Job#: 3023519 Job Description: Senior Systems Engineer - Model-Based Systems Engineering (MBSE)Clearance Required: TS/SCI with CI PolygraphLocation: Onsite - U.S. Citizenship RequiredOverviewWe are seeking an experienced Systems Engineer with strong Model-Based Systems Engineering (MBSE) expertise to support system design, integration, and digital-engineering activities within a complex, mission-critical environment. The role requires hands-on technical skills, cross-team collaboration, and the ability to work within secure government programs.
Required Skills- Practical experience applying Model-Based Systems Engineering (MBSE) principles.
- Proficiency with Cameo or similar system-modeling tools.
- Familiarity with Digital Engineering practices and toolchains supporting design, integration, and test.
- Experience with high-level programming languages (e.g., Python).
- Demonstrated engineering technical depth and project management capability.
- Experience collaborating with internal and external stakeholders in highly regulated environments.
- Active TS/SCI with CI Polygraph security clearance (transferable); must be active prior to start.
Desired Skills- Experience with systems installation, integration, and test activities.
- Additional programming proficiency (Python, C++, etc.).
- Experience performing Request for Change (RFC) impact reviews and assessments.
- Background supporting programs with rapid delivery, evolving requirements, or high operational tempo.
- Proven customer-facing communication, stakeholder engagement, and relationship-building.
- Experience collaborating across multiple contracts, teams, or locations.
- Familiarity with JIRA, Confluence, and other collaborative engineering tools.
- Strong written and verbal communication, able to convey complex technical concepts clearly.
Experience Requirements- 6+ years engineering experience for mid-level candidates (P3).
- 8+ years engineering experience for senior-level candidates (P4).
Education Requirements- Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM).
- 8+ years of relevant engineering experience (advanced degrees may count toward experience at hiring manager's discretion).
EEO Employer
Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Employee Services Department at or .
Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click for more details.
Apex Benefits Overview: Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Apex team member can provide.
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