Job#: 3041514 Job Description: Senior Information System Security Officer
Location: Washington, DC (Hybrid)
Work Environment
This position is currently 100% remote. However, candidates must be located within a local radius of Washington, D.C., and be available to come onsite occasionally if requested.
PLEASE NOTE: Candidates must be able to obtain and/or maintain a Department of Defense Secret TS/SCI security clearance as a condition and continuation of employment* (sponsorship unavailable)
Role Overview
We are seeking a Senior Information System Security Officer to support a federal government client. This role involves leading efforts to remediate and stabilize a security environment that has been neglected. The primary goals are to clean up existing security and compliance issues and increase automation. The successful candidate will be part of a team responsible for managing security controls across approximately 90 systems, focusing on enterprise-wide control families rather than individual system ownership.
Key Responsibilities
- Lead the Risk Management Framework (RMF) lifecycle and the development of Authority to Operate (ATO) packages from start to finish.
- Manage and oversee Plans of Action and Milestones (POA&M), vulnerability remediation, and continuous monitoring activities.
- Provide hands-on support for incident response, threat assessments, and investigations.
- Develop and maintain System Security Plans (SSPs), Configuration Management Plans, Contingency Plans, and Incident Response Plans.
- Conduct risk assessments, annual security assessments, and vulnerability assessments.
- Lead security audits, accreditation efforts, and compliance reviews to ensure adherence to federal standards.
- Support the integration of security throughout the System Development Life Cycle (SELC) by working with development teams.
- Perform security architecture reviews and contribute to the design of secure solutions.
- Brief leadership on security posture and mentor junior ISSO staff.
Required Qualifications
Education and Experience:- Bachelor's degree with 10 years of experience, OR
- Associate's degree with 13 years of experience, OR
- 16 years of experience with no degree.
Technical Skills and Certifications:- Must hold one of the following: Certified Information System Security Professional (CISSP), Certified Information Security Manager (CISM), or CompTIA Advanced Security Practitioner (CASP+).
- Deep expertise in FISMA, NIST, and DHS 4300A compliance frameworks.
- Experience with GRC tools such as Xacta IA Manager and/or CSAM.
- U.S. Citizenship is required for this position.
- Experience supporting federal systems in a hands-on and leadership capacity.
Preferred Qualifications
- Previous DHS or DoD experience.
- Experience with Supply Chain Risk Management.
- Experience with GRC tools such as RegScale or eMASS.
- Knowledge of Intelligence Community directives.
- Experience supporting emergency operations or disaster response missions.
- Strong communication skills for presenting to senior leadership.
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 ClearlyRateds 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. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at
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.
Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.
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