Network Systems Engineer Jobs in California

(IT/OT & SCADA COMMUNICATION INFRASTRUCTURE)

SUMMARY

The Network Systems Engineer is responsible for the design, configuration, testing, commissioning, and ongoing support of communication networks and networked devices that enable both Information Technology (IT) and Operational Technology (OT) systems. This role supports mission-critical infrastructure such as distributed telemetry networks, SCADA systems, industrial control systems (ICS), and enterprise networks.

The engineer applies application-level engineering judgment to translate functional and operational requirements into secure, reliable, and high-availability communication and computing solutions. This role supports geographically distributed assets including plants, substations, control centers, and remote field installations, and collaborates closely with engineering, operations, application programmers, cybersecurity experts, and field teams.

KEY RESPONSIBILITIES

• Network & Telemetry Engineering
• Design, integrate, configure, test, and support industrial communication networks and telemetry systems supporting SCADA and OT environments
• Perform application engineering to ensure network solutions meet customer objectives, system requirements, performance targets, and environmental constraints

• Evaluate existing network and telemetry systems and recommend improvements or upgrades

• Industrial Network Integration & Configuration

• Integrate, configure, and support industrial network devices including:
  • Core and edge Ethernet switches
  • Layer 3 switches and routers
  • Firewalls, VPN appliances, and secure gateways
  • Radio transceivers, cellular modems, and telemetry devices
• Configure and maintain network equipment in accordance with internal standards and cybersecurity best practices

• Assist with equipment deployment, on-site configuration, and system troubleshooting

• Network Design, Segmentation & Topologies

• Design industrial network topologies supporting reliability, redundancy, and deterministic communications
• Configure Layer 3 switches to support:
  • VLAN creation and segmentation
  • Inter-VLAN routing
  • Traffic isolation and access controls
• Develop IP addressing schemes, subnetting strategies, and routing designs appropriate for OT environments

• Support secure IT/OT separation using firewalls, DMZ architectures, and VPN technologies

• Physical Computing Infrastructure Integration

• Ensure proper integration server rack infrastructure and network interconnection interfaces in accordance with project design, best practices, and engineering, safety, and documentation standards
• Establish physical and logical network interconnections between devices to support core network infrastructure and defined topologies

• Ensure rack and infrastructure builds align with cybersecurity, maintainability, and operational best practices

• Virtualized Computing & SCADA Support Systems

• Configure and assist with deployment of computer hardware including terminals, engineering workstations, and servers used to support SCADA and OT environments
• Install and configure hypervisors on physical hardware to enable secure, virtualized system implementations
• Deploy and configure operating systems in preparation for use by internal teams, including Automation Engineers responsible for SCADA application development and programming

• Collaborate with automation, controls, and IT teams to support development, testing, and deployment of SCADA applications

• Wireless, RF & Telemetry Communications

• Engineer and support distributed telemetry networks using wired and wireless communication paths
• Coordinate and perform radio feasibility studies and radio frequency (RF) assessments
• Analyze signal strength, interference, latency, throughput, and reliability issues
• Apply RF propagation principles to evaluate coverage, interference, throughput, and reliability
• Prepare formal documentation and reports for radio studies and system assessments
• Apply radio frequency (RF) propagation principles to design and troubleshoot wireless links

• Coordinate licensed and unlicensed radio systems and cellular communication paths

• Protocols, Interfaces & Communications

• Support IP-based and serial communication interfaces, including:
  • TCP/IP and UDP networking
  • Ethernet standards
  • Serial communications (RS-232, RS-485, RS-422)
• Configure and troubleshoot industrial communication protocols such as:
  • DNP3
  • Ethernet/IP
  • Modbus TCP/RTU
  • IEC 60870-5-104 or similar

• Ensure reliable end-to-end communications between field devices and control systems

• Cybersecurity & Compliance

• Apply cybersecurity best practices for industrial networks, including:
  • Network segmentation and least-privilege access
  • Secure device configurations and credential management
  • Encrypted communications and VPNs
• Support compliance with applicable standards and frameworks (e.g., NIST, IEC 62443, NERC CIP)

• Collaborate with IT and cybersecurity teams to identify risks and implement mitigation strategies

• Testing, Commissioning & Support

• Develop and execute factory and site acceptance testing (FAT/SAT) for network and telemetry systems
• Support commissioning activities in substations, plants, control centers, and remote field locations
• Provide Tier II/Tier III troubleshooting and operational support for network and telemetry issues

• Maintain accurate network diagrams, configuration records, and technical documentation

• Training & Collaboration

• Provide technical guidance and mentoring to engineers and technicians
• Support on-site customer and internal training as required
• Participate in ongoing training to maintain and expand knowledge of current and emerging technologies
• Collaborate with internal teams, customers, and vendors throughout the project lifecycle

QUALIFICATIONS

Education

- Bachelor’s degree in Electrical Engineering, Computer Engineering, Computer Science, Information Technology, or a related field
- Equivalent experience may be considered in lieu of a degree

Experience

- 5+ years of experience designing, integrating, and supporting industrial or mission-critical communication networks
- Demonstrated experience with Layer 3 switching, VLAN segmentation, and routed networks
- Experience supporting SCADA, telemetry, or OT network environments

Core Technical Skills

- Strong application engineering knowledge of:
- Industrial network topologies and redundancy models
- Layer 2 and Layer 3 Ethernet switching
- VLAN and IP-based segmentation
- Proficiency in:
- TCP/IP and UDP networking principles
- IP and serial communications and interfaces
- Working knowledge of:
- Virtualization and hypervisor technologies (VMware / Hyper-V / Proxmox)
- RF communication fundamentals and propagation
- Firewalls, VPNs, and secure gateways

Preferred Qualifications

- Experience in water/wastewater, utilities, energy, or critical infrastructure environments
- Familiarity with industrial networking vendors (e.g., Cisco, Ruggedcom, Hirschmann, Moxa, Fortinet, Stratix, or equivalent)
- Experience with RF propagation modeling tools
- Knowledge of OT cybersecurity standards and regulatory requirements
- Relevant certifications (CCNA/CCNP, Network+, Security+, radio, virtualization, or industrial networking certifications)

Key Competencies

- Strong analytical and troubleshooting skills across wired, wireless, and serial networks.
- Ability to translate operational requirements into secure, reliable network designs and engineering solutions.
- Detail-oriented with a focus on system availability, performance, and cybersecurity.
- Effective written and verbal communication skills. Effective communicator with engineering, operations, and field teams.
- Ability to work independently, as part of a multidisciplinary team, and collaboratively with professionalism and discretion.
- Ability to prioritize and manage multiple deadlines in a fast-paced environment.
- Proficiency with Microsoft Office and other common business and collaboration tools.

Other Requirements

- Valid California Driver’s License.

Working Conditions

- Combination of office, industrial facility, and field environments, depending on project needs.
- Office environment – sitting for long periods, standing, walking, typing, carrying, pushing, bending. Work is primarily conducted indoors with varying environmental conditions such as fluorescent lighting and air conditioning.
- Field environment – jobsite visits as required to support project work. Work is often conducted in a construction zone (indoor and/or outdoor) with PPE requirements and varying environmental conditions such as higher noise levels, dust, dirt floors, concrete floors, and no air conditioning.
- Office work anticipated at approximately 65%-75%. Field activity expected about 25%-35%.
- Regular field travel, including remote sites. Ability to travel to customer sites, vendor facilities, or project locations (typically 25%-35%).
- Ability to meet safety, training, and site access requirements.
- Ability to perform extensive computer work and work extended hours when necessary.
- May include work during off-hours for system cutovers, testing, or urgent support events.
- Occasional lifting of not to exceed 40 lbs.

We fully comply with the ADA and applicable state law, including considering reasonable accommodation measures that may enable qualified disabled applicants and employees to perform essential functions.