> Markdown version of [/jobs/ext/3948443-senior-systems-architecture-engineer-eng-iii](https://www.wearedevelopers.com/jobs/ext/3948443-senior-systems-architecture-engineer-eng-iii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Systems Architecture Engineer (ENG III) - **Company:** Mount Indie - **Location:** Fort Belvoir, VA, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Systems Engineering, Systems Architecture - **Published:** October 27, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9263813/senior-systems-architecture-engineer-eng-iii ## About the Role * 7+ years on missile defense or other large, complex DoD programs * Solid understanding of the current missile defense architecture and future concepts * Experience modeling, assessing and evaluating future missile defense architectures * Strong at interpreting results and presenting findings clearly * Excellent written and verbal communication and strong collaboration * Strong time management and prioritization * Bachelor's degree in a STEM field * Active Secret clearance with the ability to obtain TS/SCI * Onsite in Fort Belvoir, VA Preferred Qualifications * Active TS/SCI clearance * AFSIM or similar missile defense simulation tools and frameworks * Integrated air and missile defense (IAMD) or cruise missile defense systems * Space systems * Defining and applying advanced concepts and algorithms for M&S of missile defense architectures * Systems engineering support to architecture design