Cybersecurity SME Modern Technology Solutions, Inc. 401(k) United States, Virginia, Tysons 1961 Chain Bridge Road (Show on map) Oct 16, 2026 How you will contribute to our National Security and Defense mission:

MTSI is seeking a Cybersecurity Subject Matter Expert (SME) to support enterpriselevel cybersecurity, compliance, and riskmanagement activities for missioncritical defense systems. In this role, you will help drive continuous risk management framework (RMF) compliance, guide cyber risk mitigation efforts, and ensure adherence to DoD and federal cybersecurity frameworks. You will work closely with system owners, engineering teams, accrediting authorities, and mission partners to assess system posture, identify vulnerabilities, and implement effective remediation plans that strengthen overall cyber readiness.

As a Cybersecurity SME, you will be responsible for evaluating system evidence, reviewing security controls, conducting formal compliance checks, and synthesizing technical data into clear recommendations for decisionmakers. Your expertise will support programs across their full lifecycle, from initial system assessments through continuous monitoring and audit readiness. This position requires strong analytical skills, deep familiarity with NIST and DoD frameworks, and the ability to lead and coordinate key cybersecurity activities in a fastpaced environment.

Responsibilities include:

Review test results (e.g., scans, STIGs), POA&Ms, and other cybersecurity artifacts for quality and completeness.

Generate, update, or maintain system security documentation, including:

System Security Plans

System Inventory

CONOPS

Authorization Boundary Diagrams

PPSM

Securityrelated plans and procedures (e.g., Media Protection, Access Control, Incident Response)

Conduct security control assessments in accordance with

NIST SP 80053.

Lead and support continuous RMF compliance cycles by ensuring documentation, processes, and controls remain current and effective.

Perform cyber risk assessments, artifact reviews, evidence evaluations, and compliance checks to validate the system's security posture.

Analyze cyber risks, system gaps, and vulnerabilities; develop actionable remediation plans aligned with mission and compliance requirements.

Interpret and apply cybersecurity and IA policies, including NIST guidelines, RMF requirements, FISMA standards, and applicable privacy directives.

Collaborate with engineering teams, system owners, ISSOs, and mission stakeholders to ensure secure system design, implementation, and sustainment.

Support audits, inspections, and formal security assessments by maintaining highquality documentation and readiness artifacts.

Provide guidance on securitycontrol inheritance, boundary definition, continuous monitoring, and governance workflows.

Qualifications Required:

5+ years of experience supporting continuous RMF compliance cycles, risk mitigation workflows, and securitycontrol documentation

Experience synthesizing cyber risk, system posture, and compliance gaps into actionable remediation plans

Experience conducting cyber risk assessments, evidence reviews, and compliance checks

Experience with IA or cybersecurity in the areas of IA policies and procedures including Privacy, NIST, RMF, and FISMA

TS/SCI clearance

CompTIA Advanced Security Practitioner (CASP+), CompTIA Security+, or Systems Security Certified Practitioner (SSCP) certification

Nice If You Have:

DoD 8140 or CWFaligned certifications

Knowledge of industrystandard tools such as Tenable or Splunk

Ability to lead or coordinate compliance readiness for audits, assessments, or enterprise governance activities

Clearance Requirements:

Must possess at Top Secret/SCI clearance.

The pay range for this position is $155,000 to $205,000/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. Notify me of jobs like this