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Space Cyber Security Engineer (Senior)

Modern Technology Solutions, Inc.
401(k)
United States, California, San Diego
Apr 23, 2026
Modern Technology Solutions, Inc. (MTSI) is seeking a Space Cyber Security Engineer (Senior) to support the Narrowband Satellite Communications (NBSC) program at Space Systems Command (SSC) in San Diego, CA. This professional requires computer science and Cyber Security engineering experience to support the design, development, integration, test, and sustainment of cyber solutions, defensive and offensive for the Mobile User Objective System (MUOS) program. MUOS is a United States Space Force (USSF) narrowband military communications satellite system that supports a worldwide, multi-service population of users in the ultra-high frequency (UHF) band.
Responsibilities:
As a Space Cyber Security Engineer (Senior) with MTSI, you will support the NBSC program at SSC.The Cyber Security Engineer (Senior) will improve and oversee Risk Management processes required to maintain Authorization to Operate (ATO) including strengthening vulnerability management, Plan of Action & Milestones (POA&M) tracking, continuous monitoring, execution of Annual Control Validations, and execution of other risk-reduction tasks. In addition, the Cyber Security Engineer (Senior) will ensure alignment between engineering operations, Information System Security Managers (ISSMs), Agent of the Security Controls Assessor (ASCA), and Authorizing Officials (AOs) to streamline critical decision-making processes, uphold mission readiness, and effectively manage oversight requirements throughout the program.Furthermore, the Cyber Security Engineer will be leading the MUOS contractor Cyber Team as the Key Personnel (KP) and A&A Team Lead with MUOS program Government Cyber Security Lead oversight, input and direction. MUOS is a USSF narrowband military communications satellite system that supports a worldwide, multi-service population of users in the ultra-high frequency (UHF) band.In this position, you will provide Advisory and Assistance Service (A&AS) to SSC for procurement of additional satellites, ground systems and follow-on capability to the MUOS program. A successful candidate should be a leader and problem solver with a proven ability to deliver superior results as part of a high-performing team in a high-profile, fast-paced environment.
Your essential job functions will include but may not be limited to:
  • Assist the MUOS Program Government Cyber Security Lead as the A&A Lead and KP in managing and overseeing tasks assigned to Information Systems Security Engineers (ISSEs) and System Security Engineers, scheduling, and ensuring that the team successfully completes all objectives and security best practices for Risk Management Framework (RMF) requirements.
  • Provide oversight into Assessment and Authorization (A&A) activities to ensure consistent compliant RMF execution across all MUOS systems.
  • Address increasing system complexity due to evolving Department of War (DoW) Cyber Security requirements.
  • Work high-visibility, mission critical aspects of programs and performs all functional duties independently- oversees and responsible for efforts of subordinates.
  • Perform System monitoring and verify the integrity and availability of hardware, network, and server resources and systems.
  • Review System and application logs and verify completion of scheduled jobs, including system backups.
  • Assist network modeling, analysis, planning, and coordination between network and data communications hardware and software.
  • Communicate clearly, concisely, and with technical accuracy-oral and written.
Qualifications:
  • Minimum 10 years DoD/IC, or relevant industry work experience.
  • Knowledge of evolving space cyber threats, strategy, policy, and regulation.
  • Understanding of NBSC operational environment and corresponding mission user needs.
  • Experience managing Cyber Security/IA issues such as secure provision, operate and maintain, protect and defend, analyze/investigate, respond, recover, and oversee/govern networks and systems.
  • Experience in interface with cyber authorities such as NSA to support Key Management Infrastructures (KMI) and manage Assessment and Authorization (A&A) approvals.
  • Expertise providing Information System Security Engineering (ISSE) subject matter expertise to obtain and maintain system authorizations such as: Interim Authority to Test (IATT), Interim and full Authority to Operate (IATO/ATO), Interim and full Authority to Connect (IATC/ATC), Cross Domain Solution Authorization (CDSA) and Assessment and Authorizations (A&A) in both the developmental and operational environments.
  • Experience in system tests including the ability of systems designs to support test ability requirements.
  • Experience with Statements of Work (SOW) and Performance Work Statements (PWS).
Qualifications Desired:
  • Relevant DoD and/or Industry work experience in SATCOM/MUOS.
  • Advisory and Assistance Service (A&AS) to Government program office.
  • Experience with space and/or multi-domain warfighter operations.
  • Experience with integrated air, space and cyberspace capabilities.
  • Experience with ACAT I/II level acquisition programs.
  • Experience in Space Systems Command (SSC) acquisition.
  • Fluency with Naval Information Warfare Systems Command (NAVWAR) organizations.
Education Requirements:
  • Bachelor of Arts/Bachelor of Science (BA/BS) degree from an accredited college or university.
Certifications Requirements:
  • The ability to obtain DAWIA Level III certification in Information Systems or equivalent within 12months after hire date.
Security Clearance Requirements:
  • Candidate must have active TOP SECRET clearance as a condition of employment.
  • U.S. Citizenship is required for this position.
Location/Travel Requirements:
  • Must live within the vicinity of San Diego County, CA.
  • Required to travel up to 25% of time within the continental United States, Hawaii and OCONUS.
The pay range for this position in is $150,000/year to $185,000/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. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled.
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  • 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 December)


    • 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

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.


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