Modern Technology Solutions, Inc. (MTSI) is seeking a Software Architect to join our team in El Segundo, CA or Colorado Springs, CO.
The MILSATCOM Systems Engineering, Integration, and Test (MSEIT) effort provides leading edge Systems Engineering & Integration (SE&I) for the US Space Force’s Space Systems Center (SSC). We support the Space Force’s acquisition of state-of-the-art satellite communications systems, providing global secure, survivable, and protected communications for our nation’s warfighters. We seek technical individuals who will thrive in a highly collaborative work environment of small teams, using the most modern tools and methodologies to tackle the challenges of integrating complex space and ground communications systems.
Key Responsibilities:
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Design and implement high‑quality software while maintaining architectural integrity across the stack.
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Lead architectural decision‑making, setting technical direction and balancing key trade‑offs.
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Own solutions end‑to‑end, from design through deployment and long‑term stewardship.
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Work autonomously, showing initiative and strong problem‑solving capability.
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Collaborate closely within a small, high‑impact team and contribute to shared delivery.
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Operate effectively in a fast‑moving environment with evolving requirements.
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Shape foundational architecture and establish best practices for long‑term success.
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Adopt and explore emerging AI‑assisted development tools to enhance delivery and quality
Work Environment:
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Location: On-site
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Travel Requirements: Minimal
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Working Hours: Standard
Qualifications:
Required:
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Ability to obtain and maintain a Secret clearance
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Bachelor’s degree in engineering, computer science, mathematics, or equivalent field
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5 years of applicable experience
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Demonstrated experience designing and delivering large‑scale, production‑ready systems
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Strong cloud and Kubernetes expertise, including ecosystem tooling and Infrastructure‑as‑Code (Terraform, Ansible, or similar)
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Familiarity with GitOps, secure system design, supply‑chain security, and air‑gapped environments
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Strong understanding of DevSecOps principles
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Experience with messaging or event‑streaming platforms (e.g., Kafka).
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Broad technical capability, able to reason across the stack and make sound architectural trade‑offs
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Experience with Go, TypeScript, or Java; proficiency with Git workflows, code review, and CI/CD
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Experience with AI‑assisted and agentic development tools, including safe integration practices
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Effective technical communicator able to document and justify architectural decisions
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Proficient in Microsoft Office products (Word, Excel, Powerpoint)
Preferred Skills and Experience:
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Active Secret (or higher) clearance
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Experience supporting government or Department of War (DoW) systems
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Experience with MILSATCOM, such as AEHF, EPS, WGS, Protected Tactical SATCOM and COMSATCOM
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Experience with maintaining software requirements alongside systems engineers, and establishing requirements traceability to capabilities
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Experience integrating DevSecOps principles into software architecture
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Certifications such as INCOSE CSEP/ESEP
Compensation: The pay range for this position in California is $127,000/year to $159,000/year and for Colorado is $116,000/year to $145,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applicants should apply via MTSI's internal or external careers site.
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Vacation:
New Hires Accrue 20 days of PTO and 10 Holidays per Year
Health Insurance:
Zero Deductible Health Plans
Flexible Schedules:
Flex Schedules
Professional Development:
Up to $10,000 Annual Education/Training Reimbursement
ESOP:
Funded Stock Ownership Plan
401k Match+:
6% 401k Match + Immediate Vesting
Bonus Program:
Semi-Annual Bonus Opportunity
Mentorship:
Career Mentorship Programs
Interesting Work:
Our co-workers support some of the most important and critical programs to our national defense and security.
Values:
Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.
100% Employee Owned:
We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.
Great Benefits - Most Full-Time Staff Are Eligible for:
Starting PTO accrual of 20 days PTO/year + 10 holidays/year
Flexible schedules
6% 401k match with immediate vesting up to $9k annually
Semi-annual bonus eligibility (July and Decemeber)
Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
Up to $10,000 in annual educational reimbursement
Other company funded benefits, like life and disability insurance
Optional zero deductible Blue Cross/Blue Shield health insurance plan
Track Record of Success:
We have grown every year since our founding in 1993.
Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance
MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.
For more information about MTSI, please visitwww.mtsi-va.com
MTSI embraces nine core values including our first core value of Employees come first. Consistent with our Core Values, we are committed to Equal Opportunity, making decisions without regard to race, color, religion, sex, national origin, age, military/veteran status, disability, or any other characteristics protected by applicable law. MTSI is committed to Equal Employment Opportunity and providing reasonable accommodations to applicants and employees with physical and/or mental disabilities.
- Interesting Work: Our co-workers support some of the most important and critical programs to our national defense and security.
- Values: Our first core value is that employees come first. We challenge our co-workers to provide the highest level of support and service, and reward them with some of the best benefits in the industry.
- 100% Employee Owned: We have a stake in each other's success, and the success of our customers. It's also nice to know what's going on across the company; we have company wide town-hall meetings three times a year.
- Great Benefits - Most Full-Time Staff Are Eligible for:
- Starting PTO accrual of 20 days PTO/year + 10 holidays/year
- Flexible schedules
- 6% 401k match with immediate vesting up to $9k annually
- Semi-annual bonus eligibility (July and Decemeber)
- Company funded Employee Stock Ownership Plan (ESOP) - a separate qualified retirement account
- Up to $10,000 in annual educational reimbursement
- Other company funded benefits, like life and disability insurance
- Optional zero deductible Blue Cross/Blue Shield health insurance plan
- Track Record of Success: We have grown every year since our founding in 1993.
Modern Technology Solutions, Inc. (MTSI) is a 100% employee-owned engineering services and solutions company that provides high-demand technical expertise in Digital Transformation, Modeling and Simulation, Rapid Capability Development, Test and Evaluation, Artificial Intelligence, Autonomy, Cybersecurity and Mission Assurance
MTSI delivers capabilities to solve problems of global importance. Founded in 1993, MTSI today has employees at over 20 offices and field sites worldwide.
For more information about MTSI, please visit www.mtsi-va.com
