Senior Security Specialist – ISSO

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Description

Job Title : Senior Security Specialist – ISSO

Clearance Required : US Citizen; Public Trust

Work Location : Onsite at the Department of Treasury; 1500 Penn Ave, Washington, DC.

Alpha Omega is seeking a qualified Senior Information System Security Officer (ISSO) to join our team to support one of our government customers. The primary responsibilities for the position are to support all activities that ensure the level of security documented with the security authorization is maintained at an acceptable level of risk. The nature of the work requires that the candidate demonstrates initiative, organization, responsibility, customer service skills, and the ability to be flexible and adaptive to a fast‑paced, fluid business environment. The candidate must be able to communicate effectively and decisively with all levels of the organization, collaborate within and across teams and be able to solve practical problems as well as exercise sound judgement with regards to sensitive and confidential information.

Key Responsibilities

• Provide subject matter expertise to ensure compliance with Treasury, DHS, and NIST cybersecurity policies and frameworks.
• Support the implementation and sustainment of security controls in alignment with the NIST Risk Management Framework (RMF).
• Responsibility for and to assist system owners in maintaining system Authorization to Operate (ATO) status.
• Enhance Treasury’s ability to measure, report, and manage cybersecurity posture and control effectiveness at a maturity level consistent with OIG FISMA Metrics Level 4 (“Managed and Measurable”).
• Strengthen collaboration and information sharing across internal Treasury offices and external partners to support cybersecurity risk reduction and resilience.
• Create and maintain documents like SSPs, POA&Ms, SARs, and other continuous monitoring reports / artifacts.

Experience & Skills

Preferred Qualifications

Certifications (Must Have One Certification)

Salary And Benefit Information

The likely salary range for this position is $86,000 - $120,000.

Application Deadline

January 10, 2026.

Benefits

Culture And Values

Guided by our core values—Harmony, Engagement, Accountability, Resourcefulness, and Tenacity (HEART)— we foster a culture of innovation, collaboration, and continuous learning and are committed to delivering high‑impact solutions.

Our Company

Alpha Omega is an award‑winning Federal IT solutions provider dedicated to delivering mission‑enabling technology and strategic solutions across the National Security, Federal Financial, Healthcare, and Space & Science domains.

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Other, Information Technology, and Management

Alpha Omega Integration, LLC (Alpha Omega) 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, disability, or veteran status, or any other protected class.

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