Jobs and Careers

Senior Information Systems Security Officer (ISSO)

Washington, United Statesfull_timeVerifiedPosted 28 May 2025

About the role

At MetaPhase, we believe Quirky is Cool and being authentic is the only way to be! We take the work we do very seriously and do a lot of important mission-focused work for our clients. We are individuals with different passions and strengths who take as much joy in the work we do as from those we work with. Today, we have a team that is invested in creating new solutions that lean forward, challenge the status quo, but also reflect our intimate knowledge of our customers’ business. Over the years we have fostered a culture in which we are united by shared values—passion, solidarity, generosity, curiosity, and boldness—and these come alive in the work we do and how we do it. Together, we know our people are our difference—for our clients and our colleagues. Are you ready to:

Work alongside a dedicated and diverse set of people to offer honest advice and practical guidance to our clients?
Learn and grow by taking advantage of every opportunity available to you?
Be the difference and make it happen?

MetaPhase is seeking an experienced Senior Information Systems Security Officers (ISSO) to support a mission-critical federal program. This cybersecurity leader will guide the authorization and accreditation (A&A) process and oversee the implementation of robust security practices across Windows, Linux, and cross-domain environments. Ideal candidates will have deep expertise in User Activity Monitoring (UAM), federal compliance standards, and Sensitive Compartmented Information (SCI) network security policies. What You Will Be Doing:

Provide subject matter expertise on Authorization & Accreditation (A&A) processes across classified and sensitive network environments
Support security design and engineering for cross-domain solutions, UAM, and both Windows and Linux platforms
Manage and maintain System Security Plans (SSPs), Security Assessment Reports, and related documentation in compliance with CNSS and NIST frameworks
Lead the reconciliation of Plans of Action and Milestones (POA&M) and maintain Approvals to Operate (ATO) for enterprise systems
Interpret and apply national security policies, including those governing cross-domain solutions in SCI environments
Oversee assessment and authorization of UAM and Enterprise Audit applications
Develop, monitor, and report security metrics related to system compliance, vulnerabilities, and remediation status
Collaborate with system administrators and engineers to ensure continuous monitoring and compliance across all systems

Required Qualifications:

Bachelor’s degree in Information Technology, Cybersecurity, Engineering, or a related technical field, OR equivalent work experience
At least seven (7) years of hands-on experience with Assessment & Authorization (A&A) of federal systems
Proven experience managing UAM and enterprise audit tools within federal environments
Demonstrated understanding of CNSS policies and specific SCI/cross-domain solution requirements
Strong background in drafting and maintaining IT security documentation including SSPs and POA&Ms
Proficient in cybersecurity operations on both Linux and Windows platforms
Experienced in capturing, building, and maintaining meaningful cybersecurity metrics and dashboards
U.S. Citizenship required; Must hold an active Top Secret clearance with ability to obtain access to Sensitive Compartmented Information (SCI)

Work Setup & Clearance:

Washington, DC - Onsite
Clearance: Must hold an active Top Secret clearance with ability to obtain access to Sensitive Compartmented Information (SCI)

About MetaPhase

MetaPhase is different with a purpose - demonstrating a new approach to the industry that puts employees and culture first! We continue to be recognized by industry as one of the fastest growing and most impactful consultancies in the nation, and are aggressivel