Senior Network Security Engineer Jobs
Senior Network Security Engineer jobs are open across financial services, healthcare, defense, technology, and critical infrastructure, at every level from mid-level to principal and distinguished engineer, with specializations in zero-trust architecture, cloud security, and threat detection. Find a role that fits from the openings below and apply directly.
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Showing 5 of 74+ Senior Network Security Engineer jobs
INTRODUCTION
SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation—helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days.
Why join SimSpace?
We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers.
How Do We Work?
We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That belief shows up in action: in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth.
Who Thrives Here?
We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we’re committed to building teams that reflect the communities we serve. Whether you’re remote or office-based, you’ll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world.
We invite you to apply today!
The Senior Network Security Engineer position is a senior technology practitioner responsible for the collaborative design, implementation, monitoring, maintenance, and security of enterprise network infrastructure and security platforms across SimSpace corporate offices and data centers across the United States and Europe. This individual will serve as a senior technical resource and subject matter expert for both network and security infrastructure, helping lead operational support, architecture, modernization, and incident response efforts. The role combines traditional network engineering responsibilities with expanded ownership of network security operations, secure access technologies, firewall management, web application protection, and vulnerability management. The successful candidate will possess deep technical expertise in enterprise networking and security technologies, strong analytical and troubleshooting skills, and the ability to lead initiatives and mentor junior engineers. Effective collaboration with infrastructure, cloud, security, and business stakeholders is critical to success in this role.
What You Will Do (Responsibilities)
- Act as the subject matter expert for SimSpace network and network security infrastructure
- Design, implement, support, and secure enterprise network infrastructure and software-defined networking solutions
- Configure and maintain complex VMware environments leveraging NSX-T, DVS, and software-defined networking technologies
- Contribute to the design and implementation of resilient, secure, and scalable network architectures
- Configure and troubleshoot virtual networking, VLANs, VRFs, traffic forwarding, and hybrid cloud connectivity
- Troubleshoot all levels of network connectivity issues including, but not limited to, network outages, switch failures, network performance, network interface card (NIC), cabling, TCP/IP configuration, etc.
- Manage and optimize secure web access technologies including content filtering, secure web proxy, SSL inspection, DLP, and zero-trust remote access platforms
- Administer next-generation firewall infrastructure, including firewall policies, ACLs, NAT, IPS/IDS, VPNs, routing, segmentation, and high-availability configurations
- Manage web application firewall (WAF) and edge security technologies, including rulesets, custom protections, bot mitigation, and application-layer threat prevention
- Perform troubleshooting of complex network and security incidents, including outages, performance issues, routing failures, VPN issues, and security events
- Assist in vulnerability management activities for network and security infrastructure, including performing web application vulnerability assessments using DAST tools, coordinating remediation efforts, and validating corrective actions
- Monitor network and security infrastructure performance and execute corrective actions as needed
- Support centralized logging, security monitoring, alerting, and threat analysis activities across network and security platforms
- Assess existing network and security technologies to identify opportunities for modernization, improved security posture, and operational efficiency
- Maintain documentation, standards, and operational procedures for network and security infrastructure
- Provide technical leadership, mentorship, and guidance to junior engineers and operational staff
- Participate in maintenance activities, infrastructure upgrades, and business-driven technology projects
What You Will Bring (Requirements And Bonus Skills)
- 8+ years of network engineering experience
- 5+ years of hands-on network security or security infrastructure experience
- Strong understanding of enterprise networking concepts, protocols, and infrastructure design
- Strong knowledge of routing, switching, TCP/IP, DNS, VPNs, network segmentation, and secure remote access technologies
- Experience managing next-generation firewalls, secure web gateways, WAFs, and zero-trust security platforms
- Strong hands-on experience with firewall policy management, NAT, IPS/IDS, VPN technologies, and routing protocols including BGP
- Strong understanding of web certificates, PKI, TLS/SSL encryption, certificate lifecycle management, and troubleshooting certificate-related connectivity or inspection issues
- Experience with LAN/WAN design including IP allocations, segmentation, VLAN implementation, and hybrid cloud networking
- Proficiency with packet captures, traffic analysis, and network troubleshooting methodologies
- Experience with centralized logging, SIEM, security monitoring, alerting, and log analysis platforms to support threat detection and incident investigation
- Familiarity with vulnerability management and security assessment tools
- Experience with monitoring and observability platforms
- Ability to lead technical implementations, infrastructure upgrades, and operational initiatives
- Ability to quickly learn and adapt to new technologies and platforms
- Strong written and verbal communication skills
Preferred Qualifications
- Industry certifications such as CISSP, CCNP Security, GIAC, or equivalent
- Experience supporting cloud networking and cloud security platforms
- Experience supporting compliance frameworks such as SOC 2, ISO 27001, or CMMC
- Understanding of how to leverage AI and automation technologies to improve security operations, operational efficiency, threat analysis, and workflow optimization
COMPENSATION
- Base salary range: $135,000 - $205,000 reflecting our confidence in your expertise and impact, with the opportunity for bonuses tied to company performance and individual contributions.
Health & Wellness
Comprehensive medical, dental, and vision benefits, plus savings plans—coverage starts on day one!
Mental Health Support
Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
Financial Well-Being
Plan for your future with a 401(k)-retirement savings plan featuring a company match.
Flexible Time Off
Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members.
Parental Leave
Paid leave plans to support you and your loved ones during life’s most important moments.
Ownership Opportunities
Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success.
Referral Rewards
Earn $1,500–$3,500 for every qualified hire through our employee referral program.
Peloton Interactive Wellness Program
Full- and partial-subsidized membership plans and equipment discounts to help you reach your personalized fitness goals.
Continuous Learning
Access a LinkedIn Learning membership to prioritize your personal and professional development.
Social Connections
Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.
Extra Perks
Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life’s details.
Join SimSpace and enjoy benefits that enhance your career, health, and happiness!
SimSpace Is An Equal Opportunity Employer
In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.
SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.
Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However, no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application!
We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com.
SimSpace does not accept unsolicited resumes from employment agencies.
Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.
INTRODUCTION
SimSpace serves as an AI Proving Ground where organizations can confidently train, test, and outmaneuver adversaries in any environment. Trusted by allied governments, militaries, enterprises, and research institutions worldwide, SimSpace enables adaptive, AI-ready defenses that stay ahead of evolving threats. Founded in 2015 by experts from U.S. Cyber Command and MIT Lincoln Laboratory, the platform unifies training, testing, and validation in a realistic, live-fire simulation—helping teams evaluate security investments, optimize performance, and compress cyber readiness cycles from months to days.
Why join SimSpace?
We are an organization that is focused on building our culture and mindfully enhancing our atmosphere every day which is why we have collaborated on an integral value system. Our governing philosophy of being Human Centered is deeply embedded within our value system. We apply this philosophy to every one of our internal team members, external clients, and their customers.
How Do We Work?
We believe that people are at the center of everything we do. SimSpace fosters a culture of continuous learning, curiosity, and professional growth. That belief shows up in action: in-house training, internal and external learning platforms, cyber conferences, industry events, and dedicated time for skill development. Our people are empowered to shape their careers - and it shows. Year over year, SimSpace consistently outperforms industry benchmarks in internal mobility, promotions, and total rewards growth.
Who Thrives Here?
We are a team of innovators, protectors, and problem-solvers. We believe diversity of thought and experience fuels better solutions, and we’re committed to building teams that reflect the communities we serve. Whether you’re remote or office-based, you’ll collaborate with talented colleagues across departments and time zones, united by the mission to create a safer digital world.
We invite you to apply today!
The Senior Network Security Engineer position is a senior technology practitioner responsible for the collaborative design, implementation, monitoring, maintenance, and security of enterprise network infrastructure and security platforms across SimSpace corporate offices and data centers across the United States and Europe. This individual will serve as a senior technical resource and subject matter expert for both network and security infrastructure, helping lead operational support, architecture, modernization, and incident response efforts. The role combines traditional network engineering responsibilities with expanded ownership of network security operations, secure access technologies, firewall management, web application protection, and vulnerability management. The successful candidate will possess deep technical expertise in enterprise networking and security technologies, strong analytical and troubleshooting skills, and the ability to lead initiatives and mentor junior engineers. Effective collaboration with infrastructure, cloud, security, and business stakeholders is critical to success in this role.
What You Will Do (Responsibilities)
- Act as the subject matter expert for SimSpace network and network security infrastructure
- Design, implement, support, and secure enterprise network infrastructure and software-defined networking solutions
- Configure and maintain complex VMware environments leveraging NSX-T, DVS, and software-defined networking technologies
- Contribute to the design and implementation of resilient, secure, and scalable network architectures
- Configure and troubleshoot virtual networking, VLANs, VRFs, traffic forwarding, and hybrid cloud connectivity
- Troubleshoot all levels of network connectivity issues including, but not limited to, network outages, switch failures, network performance, network interface card (NIC), cabling, TCP/IP configuration, etc.
- Manage and optimize secure web access technologies including content filtering, secure web proxy, SSL inspection, DLP, and zero-trust remote access platforms
- Administer next-generation firewall infrastructure, including firewall policies, ACLs, NAT, IPS/IDS, VPNs, routing, segmentation, and high-availability configurations
- Manage web application firewall (WAF) and edge security technologies, including rulesets, custom protections, bot mitigation, and application-layer threat prevention
- Perform troubleshooting of complex network and security incidents, including outages, performance issues, routing failures, VPN issues, and security events
- Assist in vulnerability management activities for network and security infrastructure, including performing web application vulnerability assessments using DAST tools, coordinating remediation efforts, and validating corrective actions
- Monitor network and security infrastructure performance and execute corrective actions as needed
- Support centralized logging, security monitoring, alerting, and threat analysis activities across network and security platforms
- Assess existing network and security technologies to identify opportunities for modernization, improved security posture, and operational efficiency
- Maintain documentation, standards, and operational procedures for network and security infrastructure
- Provide technical leadership, mentorship, and guidance to junior engineers and operational staff
- Participate in maintenance activities, infrastructure upgrades, and business-driven technology projects
What You Will Bring (Requirements And Bonus Skills)
- 8+ years of network engineering experience
- 5+ years of hands-on network security or security infrastructure experience
- Strong understanding of enterprise networking concepts, protocols, and infrastructure design
- Strong knowledge of routing, switching, TCP/IP, DNS, VPNs, network segmentation, and secure remote access technologies
- Experience managing next-generation firewalls, secure web gateways, WAFs, and zero-trust security platforms
- Strong hands-on experience with firewall policy management, NAT, IPS/IDS, VPN technologies, and routing protocols including BGP
- Strong understanding of web certificates, PKI, TLS/SSL encryption, certificate lifecycle management, and troubleshooting certificate-related connectivity or inspection issues
- Experience with LAN/WAN design including IP allocations, segmentation, VLAN implementation, and hybrid cloud networking
- Proficiency with packet captures, traffic analysis, and network troubleshooting methodologies
- Experience with centralized logging, SIEM, security monitoring, alerting, and log analysis platforms to support threat detection and incident investigation
- Familiarity with vulnerability management and security assessment tools
- Experience with monitoring and observability platforms
- Ability to lead technical implementations, infrastructure upgrades, and operational initiatives
- Ability to quickly learn and adapt to new technologies and platforms
- Strong written and verbal communication skills
Preferred Qualifications
- Industry certifications such as CISSP, CCNP Security, GIAC, or equivalent
- Experience supporting cloud networking and cloud security platforms
- Experience supporting compliance frameworks such as SOC 2, ISO 27001, or CMMC
- Understanding of how to leverage AI and automation technologies to improve security operations, operational efficiency, threat analysis, and workflow optimization
COMPENSATION
- Base salary range: $135,000 - $205,000 reflecting our confidence in your expertise and impact, with the opportunity for bonuses tied to company performance and individual contributions.
Health & Wellness
Comprehensive medical, dental, and vision benefits, plus savings plans—coverage starts on day one!
Mental Health Support
Access to company-paid counseling, coaching, and resources for you and your family through Spring Health.
Financial Well-Being
Plan for your future with a 401(k)-retirement savings plan featuring a company match.
Flexible Time Off
Take the time you need with unlimited vacation and dedicated health & wellness days. SimSpace provides flexible solutions to meet the diverse work-life needs of team members.
Parental Leave
Paid leave plans to support you and your loved ones during life’s most important moments.
Ownership Opportunities
Equity stock options at hire, with annual performance-based grants—become an invested stakeholder in our shared success.
Referral Rewards
Earn $1,500–$3,500 for every qualified hire through our employee referral program.
Peloton Interactive Wellness Program
Full- and partial-subsidized membership plans and equipment discounts to help you reach your personalized fitness goals.
Continuous Learning
Access a LinkedIn Learning membership to prioritize your personal and professional development.
Social Connections
Monthly reimbursements for meaningful connections with teammates through our SocialSpace Community.
Extra Perks
Legal plan coverage, pet insurance, wellness reimbursements, and more to simplify life’s details.
Join SimSpace and enjoy benefits that enhance your career, health, and happiness!
SimSpace Is An Equal Opportunity Employer
In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification document form upon hire.
SimSpace is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, pregnancy, genetic information, disability, status as a protected veteran, or any other protected category under applicable federal, state, and local laws. We are committed to providing an inclusive and welcoming environment for all members of our staff, clients, volunteers, subcontractors, vendors, and clients.
Research shows that women and people from underrepresented groups only apply to jobs if they meet all of the qualifications. However, no one ever meets 100% of the qualifications. SimSpace encourages you to break that statistic and to apply. We look forward to your application!
We also consider qualified applicants regardless of criminal histories, in accordance with applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities in our job application procedures. If you need assistance or accommodation due to a disability, please contact careers@simspace.com.
SimSpace does not accept unsolicited resumes from employment agencies.
Actual compensation for the position is based on a variety of factors, including, but not limited to affordability, skills, qualifications and experience, and may vary from the range.
See All 74+ Senior Network Security Engineer Jobs
Jump back to the full list of openings and apply to any senior network security engineer role that fits.
Find JobsSenior Network Security Engineer Job Market
A snapshot from current openings nationwide, updated as new roles post.
Who's Hiring
- Palo Alto Networks11
- SiTime4
- American Credit Acceptance2
- Ampere Computing2
- Bloomberg2
Top Industries Hiring
- Technology & Software23
- Electronics & Hardware9
- Manufacturing9
- Agriculture & Farming6
- Banking & Financial Services6
What Employers Look For
The qualifications that appear most often in senior network security engineer jobs.
- Seven or more years of hands-on network security engineering experience in enterprise or critical infrastructure environments
- Deep expertise in firewalls, intrusion detection and prevention systems, and network access control tools
- CISSP, CCNP Security, or CCIE Security certification is strongly preferred or required
- Experience designing and implementing zero-trust network architecture and microsegmentation strategies
- Proficiency with SIEM platforms such as Splunk, Microsoft Sentinel, or IBM QRadar for threat monitoring
- Bachelor's degree in computer science, cybersecurity, information systems, or a closely related field
Tips for Your Senior Network Security Engineer Job Search
Align your resume to each job
Generic resumes lose out at this level. Mirror the exact stack each posting names, whether that's Palo Alto, Cisco Firepower, or SASE platforms, and lead with measurable outcomes like network segments hardened or incidents reduced, not just job duties.
Earn certifications that clear automated screens
CISSP, CCIE Security, and CCNP Security appear as hard filters in most applicant tracking systems for senior roles. If you hold one but not the others, list it prominently and note active pursuit of the next certification so screeners don't filter you out early.
Apply early to roles that fit
Migrate Mate lists senior network security engineer openings from across the United States in one place, so you can find roles that match and apply directly to each listing.
Target roles by the security domain you own
Search by domain, not just title. Cloud network security, OT and ICS security, and zero-trust implementation are distinct hiring tracks. Filtering for your strongest domain surfaces roles where your experience reads as a direct match rather than a partial fit.
Prepare a threat-scenario walk-through for interviews
Senior-level technical screens routinely ask you to architect a defense against a specific attack vector or post-breach scenario. Prepare two or three walk-throughs using a recent real-world incident type, covering detection, containment, and remediation steps in your preferred toolchain.
Negotiate scope before accepting an offer
At the senior level, titles and compensation vary widely based on whether you own architecture decisions, manage a team, or carry an on-call rotation. Clarify these responsibilities before accepting so your day-to-day matches what you agreed to.
Senior Network Security Engineer Jobs: Frequently Asked Questions
Which companies are hiring the most senior network security engineers?
The companies hiring the most senior network security engineers right now include Palo Alto Networks, SiTime, and American Credit Acceptance, with the largest share of openings in California, Texas, and New York, based on current listings on Migrate Mate as of June 2026. Defense contractors, major financial institutions, and large cloud providers consistently post the highest volume of senior-level openings.
How many senior network security engineer jobs are remote?
About 41% of senior network security engineer openings are fully remote or hybrid as of June 2026, though roles tied to classified environments or on-premises infrastructure typically require on-site presence. Cloud network security and threat detection roles are the most likely to offer fully remote arrangements, while OT, ICS, and government-adjacent positions almost always require a physical location.
How do you become a senior network security engineer?
Start with a foundation in networking, earning certifications like CompTIA Network+ and then CCNA before moving into security-specific credentials such as CCNP Security or CISSP. Build hands-on experience across firewall management, vulnerability assessment, and incident response. Progress through network security analyst or engineer roles, take on architecture responsibilities, and develop fluency in at least one major SIEM and cloud security platform before targeting senior openings.
Can I get hired as a senior network security engineer without direct senior-level experience?
It's possible if your mid-level experience directly overlaps with senior responsibilities. Candidates who have owned firewall architecture decisions, led a significant network segmentation project, or served as the de facto senior engineer on a small team often qualify. A strong CISSP or CCIE Security credential can offset a gap in title history, especially at organizations that weight demonstrated technical depth over years of service.
What does the senior network security engineer interview process look like?
Most processes start with a recruiter screen focused on your domain experience and certification status, followed by a technical phone or video interview covering network protocols, firewall logic, and threat modeling. A hands-on or whiteboard exercise asking you to design a secure network segment or respond to a simulated breach scenario is common at the senior level. Final rounds typically include a panel with the security architecture or engineering leadership team.
Where can I find and apply to senior network security engineer jobs?
You can find and apply to senior network security engineer jobs on Migrate Mate, which lists current openings from across the United States. Search the listings to find roles that match your domain expertise, seniority level, and preferred work arrangement, then apply directly to each listing that fits.
See All 74+ Senior Network Security Engineer Jobs
Jump back to the full list of openings and apply to any senior network security engineer role that fits.
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