Senior ISSM

Job#: 3033138

Job Description:
Senior Information System Security Manager (ISSM)

Location: Fairfax, Virginia

Work Arrangement: Hybrid

Employment Type: Permanent/Direct-Hire

Role Overview

We are seeking a seasoned Senior Information System Security Manager (ISSM) to support cybersecurity for a hybrid enterprise environment spanning cloud and on-premise systems. This role is responsible for managing the Cybersecurity Program, ensuring compliance, managing risk, and maintaining the security posture of information systems. The ISSM will navigate the Risk Management Framework (RMF), assess the security of existing solutions, and architect hybrid approaches to optimize system capabilities while maintaining robust cybersecurity defenses.

Key Responsibilities

• Lead the creation and enforcement of enterprise-wide security policies, standards, and procedures to ensure compliance with federal mandates.
• Oversee the full execution of the RMF process, including system categorization, security control selection, and continuous monitoring.
• Coordinate the preparation and maintenance of System Security Plans (SSP) and assessment packages to secure and maintain formal system authorizations to operate (ATO).
• Lead vulnerability assessments, prioritize remediation activities, and interpret technical threats for executive leadership.
• Direct high-level incident response efforts, ensuring proper forensic investigations and post-event analysis.
• Manage and mentor Information System Security Officers (ISSOs) and other cybersecurity professionals.
• Translate complex technical security challenges into business risk language for senior leadership.
• Act as the primary point of contact for external auditors, government customers, and regulatory bodies.
• Support business development activities by enabling secure system authorizations and ensuring compliance with CMMC and DFARS requirements.

Required Qualifications

Clearance: Candidates must be able to obtain and/or maintain a Department of Defense (DoD) Top Secret (TS) Security Clearance as a condition or continuation of employment.

Education: A Bachelor's degree in Computer Science, Cybersecurity, Information Systems Management, or a similar STEM discipline is required.

Experience: 16+ years in cybersecurity, information assurance, or IT security is required, with 8+ of those years in a senior leadership, ISSM, or Security Architect role. Candidates must have an active Top Secret security clearance.

Technical Skills:

• Active IAT or IAM Level III certification (e.g., CISSP, CISM, CASP+).
• Proficiency with NIST SP 800-53, NIST RMF SP 800-37, CNSSI No. 1253, NISPOM, and DCSA DAAPM.
• Experience with the full RMF lifecycle, network architecture, cloud security (FedRAMP), and data protection.
• Knowledge of threat modeling, vulnerability management, and incident response leadership.
• Familiarity with compliance tools such as eMASS, XACTA, ACAS/Tenable Nessus, SCAP, and STIGs/SRGs.
• Demonstrated knowledge of Windows Domain and Linux systems architectures.
• U.S. Citizenship is required.

Preferred Qualifications

• A Master's degree in a STEM discipline.
• Expertise with artificial intelligence and machine learning (AI/ML) systems.
• Hands-on experience with Atlassian's Jira and Confluence.

#clearance
Compensation & Benefits

The anticipated salary range for this position is $210,000.00 to $240,000.00 annually. This employer offers a comprehensive benefits package.

Company Overview

Our organization is a leading provider of technology solutions, supporting critical national security missions. We value operational security and foster a culture of innovation and continuous improvement. We are committed to aligning our initiatives with our strategic goals and objectives.

This employer is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability.

Apex uses a virtual recruiter as part of the application process. Click for more details.

If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at or .

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRated's Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico. Everforth Apex uses a virtual recruiter as part of the application process. Click for more details.

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our 'Welcome Packet' as well, which an Everforth Apex team member can provide.