Mid Level Third Assistant Engineer Jobs
Mid level third assistant engineer jobs go to engineers ready to own projects end to end, mentor junior colleagues, and make technical decisions with limited oversight. Openings are concentrated across Banking & Financial Services, Technology & Software, and Insurance, with a mix of on-site, hybrid, and remote positions, and employers like TikTok USDS Joint Venture, Optum, and Stripe hiring at this level now.
Find JobsOverview
Showing 5 of 11+ Mid Level Third Assistant Engineer jobs











Explore opportunities with Kelsey-Seybold Clinic, part of the Optum family of businesses. Work with one of the nation's leading health care organizations and build your career at one of our 40+ locations throughout Houston. Be part of a team that is nationally recognized for delivering coordinated and accountable care. As a multi-specialty clinic, we offer care from more than 900 medical providers in 65 medical specialties. Take on a rewarding opportunity to help drive higher quality, higher patient satisfaction and lower total costs. Join us and discover the meaning behind Caring. Connecting. Growing together.
This individual repairs, maintains, and operates HVAC, plumbing, and electrical systems in the Pearland Administrative Building in a manner consistent with a first-class corporate office facility. The third-grade engineer has the authority to repair, maintain, and coordinate vendors as per the established guidelines of the Facility Manager and the Facilities Group.
You'll be rewarded and recognized for your performance in an environment that will challenge you and give you clear direction on what it takes to succeed in your role as well as provide development for other roles you may be interested in.
Required Qualifications:
- High School Graduate or Equivalent
- 3+ years of experience in medical office, commercial office or similar critical infrastructure buildings with specific environmental requirements
- Current City of Houston Third Grade 3rd Engineer license holder OR candidate to be test ready with required City of Houston verification letter stating 2 years of hands -on-boiler operating experiences meeting current City submittal requirements
- Applicants must meet all City Of Houston requirements and be test ready for the Third Grade Engineer position, if not already awarded
- If not already awarded, service letter verifying at least 2 years of hands-on boiler operating experience meeting current City of Houston submittal requirements must be provided. This documentation will be utilized for verification prior to consideration for the position
- The selected candidate must obtain a Third-Grade Stationary Engineer License within 6 months of employment date, if not already awarded
- Maintain knowledge state, local and federal building codes and ordinances
- Proven excellent organizational skillsets, strong communication and interpersonal skills
Preferred Qualifications:
- Current City of Houston Third Grade 3rd Engineer license holder
- Computer skills; validated skillsets in MS Office (all)
- Intermediate Building Automated Systems BAS - primarily Siemens Desigo & JCI Metasys)
- HVAC systems & repairs (all) and MEP operating systems & repairs
Pay is based on several factors including but not limited to local labor markets, education, work experience, certifications, etc. In addition to your salary, we offer benefits such as, a comprehensive benefits package, incentive and recognition programs, equity stock purchase and 401k contribution (all benefits are subject to eligibility requirements). No matter where or when you begin a career with us, you'll find a far-reaching choice of benefits and incentives. The hourly pay for this role will range from $24.00 - $43.00 per hour based on full-time employment. We comply with all minimum wage laws as applicable.
At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone-of every race, gender, sexuality, age, location and income-deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes - an enterprise priority reflected in our mission.
OptumCare is an Equal Employment Opportunity employer under applicable law and qualified applicants will receive consideration for employment without regard to race, national origin, religion, age, color, sex, sexual orientation, gender identity, disability, or protected veteran status, or any other characteristic protected by local, state, or federal laws, rules, or regulations.
OptumCare is a drug-free workplace. Candidates are required to pass a drug test before beginning employment.
See All 11 Mid Level Third Assistant Engineer Jobs
Find roles that match your experience and apply in just a few clicks.
Find JobsMid Level Third Assistant Engineer Job Market
Who's Hiring



Top Industries Hiring
- Banking & Financial Services
- Technology & Software
- Insurance
- Agriculture & Farming
Mid Level Third Assistant Engineer Jobs: Frequently Asked Questions
How do I get a mid level third assistant engineer job?
Position the depth of your experience, not just the breadth. Highlight projects where you owned outcomes, resolved technical problems independently, and influenced decisions beyond your immediate task. Applications that show progression from executing tasks to leading them stand out. Tailor your resume to demonstrate ownership and measurable results, and be ready to discuss how your work connected to larger engineering goals.
Which companies hire mid level third assistant engineers?
Companies hiring mid level third assistant engineers right now include TikTok USDS Joint Venture, Optum, and Stripe, based on current listings on Migrate Mate as of November 2026. Employers at this level tend to be established operations with active engineering teams that need experienced contributors who can work independently and step into project leadership.
Are there remote mid level third assistant engineer jobs?
Yes, though availability varies by industry and employer. About 22% of mid level third assistant engineer openings are remote or hybrid as of November 2026, reflecting broader flexibility across engineering roles. On-site positions remain common in sectors where hands-on equipment access or facility presence is required, so filtering by work setting before applying saves time.
How do I move up to a mid level third assistant engineer role?
Moving into a mid level third assistant engineer role comes from building a consistent record of independent contribution. Early-career engineers get there by taking on progressively complex assignments, owning a project or system component from start to finish, and demonstrating that they need less oversight over time. Gaining exposure to cross-functional work and mentoring newer teammates signals readiness for mid level responsibility.
Which industries hire the most mid level third assistant engineers?
Mid Level third assistant engineer roles concentrate in Banking & Financial Services, Technology & Software, and Insurance, based on current listings on Migrate Mate as of November 2026. These sectors drive hiring at this level because they operate complex systems and equipment that require engineers with enough experience to contribute independently without extensive day-to-day supervision.