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Senior Cyber Lead Engineer

Modern Technology Solutions, Inc.
$195,000.00 - $244,000.00 / yr
401(k)
United States, California, El Segundo
Dec 20, 2025
Modern Technology Solutions, Inc. is seeking a Senior Cyber Lead Engineer to join our team in El Segundo, CA. In this position, your work will have a profound impact on the country's most critical role - protecting our national security.
You will join a systems engineering team defining the next generation of space communication systems supporting US Space Force (USSF) satellite communications. You will support Systems Engineering & Integration (SE&I) activities in a multidisciplinary and collaborative environment. You will interface and collaborate with SE&I team members, contractors, government civilians and members of the USSF. You will lead and support several working groups responsible for leading technical discussion, resolve and identify risk, requirement gaps, developing briefings, writing, and tracking action items, and authoring meeting minutes.
The MILSATCOM Systems Engineering, Integration, and Test (MSEIT) effort provides leading edge Systems Engineering & Integration (SE&I) for the Space Force's Space Systems Command. We support the Space Force's acquisition of state-of-the-art Military 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:
  • Proposing, coordinating, implementing, and enforcing all Department of the Air Force information system security policies, standards, and methodologies
  • Understanding of vulnerability assessments using the Assured Compliance Assessment Solution (ACAS), Defense Information Systems Agency (DISA) Security Technical Implementation Guide (STIG), and the Security Content Automation Protocol (SCAP) Compliance Checker, incorporating automated Benchmarks in support of an Risk Management Framework (RMF) Approval to Operate decision.
  • Experience reviewing security control continuous monitoring, security audits, risk analysis and developing mitigation strategies for DoD information systems
  • Ensures software, hardware, and firmware complies with appropriate security configuration guidelines (e.g., security technical implementation guides /security requirement guides)
  • During system development, recommends protective or corrective measures, in coordination with the ISSM, when a security incident or vulnerability is discovered.
  • During system development advises acquisition program leadership on RMF process and artifacts required to obtain an ATO.
  • Coordinates activities of cyber security staff to support program cyber security requirements and generate artifacts to obtain a system ATO.
  • Recommends exceptions, deviations, or waivers to cybersecurity requirements.
  • Preparing certification letters and Memoranda of Agreement (MoA), Authorization to Connect (ATC) packages, Interconnection Security Agreement (SIA), and Security Impact Assessments with system owners for interface and networking implementations.
  • Support SSC program offices with ensuring security, quality, timeliness, mission partner support, completeness, and regulatory compliance of ATO RMF documentation.
  • Support the following responsibilities: security control assessor (SCA) and Security Technical Implementation Guide (STIG) curated to DOD/DAF/USSF baselines, audit standards, and plan of actions and milestones (POAM).
  • Attend cleared expert threat briefings; have oversight of security program design, incident response plans, cyber risk assessments, and attack surface assessments, conduct tabletop exercises, and breach readiness reviews.
  • Completes and maintains required cybersecurity certification in accordance with (IAW) AFMAN 17-1303.
Work Environment:
  • Location:On-site
  • Travel Requirements:Minimal
  • Working Hours:Standard
Qualifications:
Required:
  • Hold and maintain a Top Secret clearance
  • BA or BS degree in engineering, physics, chemistry, mathematics, computer science, network, and telecommunications; information systems, information technology, or computer information systems.
  • 25+ years of work experience in Information Assurance/Cybersecurity
  • 25+ years of experience leading teams to mission success in a dynamic fast paced environment.
  • 15 years of experience working in a military organization cybersecurity role with military tactical, space, or enterprise systems.
  • 5 years experience writing measurable and testable cyber security system requirements to ensure the defense industrial complex delivers cyber survivable systems in support of national defense.
  • 5+ years experience working in a military system program office fielding new capabilities.
  • Cybersecurity certification (IAM Level III) in accordance with DoD 8570.01-M guidance.
  • Experience creating reviewing and updating artifacts in support of NIST SP 800-37 Risk Management Framework (RMF) in accordance with DODI 8510.01.
  • Senior developer or reviewer of system security plans, Security Assessment Plans/Reports, Risk Assessment Plan/Report, Plan of Action and Milestones (POA&M), and associated cybersecurity artifacts.
  • Experience identifying Common Criteria and National Information Assurance Partnership (NIAP) certified technologies and the DISA Approved Products List (APL).
Preferred Skills and Experience:
  • Master's degree in Computer Science/Engineering with emphasis in Cyber Security
  • 25+ years of work experience in Cyber Security
  • 15+ years of work experience in System Engineering Architecture/Design
  • Previous experience supporting military satellite communications programs such as Milstar, AEHF, GPS, SMART-T
  • Security Test and Evaluation (ST&E)
  • TS/SCI Clearance
Compensation: The pay range for this position in California is $195,000/year to $244,000/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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  • 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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