Information Systems Security Officer (ISSO) Senior

Company: Avint
Location: Washington
Posted on: February 16, 2026

Job Description:

Job Description Job Description Avint LLC is seeking a highly motivated, solution-oriented, and customer-focused Information Systems Security Officer (ISSO) III to join our growing team. We are looking for a senior-level ISSO who is confident working independently and demonstrates deep technical and operational expertise. This position is 100% on-site 1750 Pennsylvania Ave, Washington, DC Requirements 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. Position Requirements: US citizen without dual citizenship Ability to obtain a Public Trust clearance Currently possess at least 8570 IAT II certification Thorough knowledge of and experience with executing the seven key steps of the Risk Management Framework (RMF) Thorough knowledge of and experience with completing the components of a FedRAMP system package, to include the System Security Plan (SSP) and the Control Implementation Summary (CIS)/Customer Responsibilities Matrix (CRM) Experience with security control implementation statement development and testing Familiarity with AI-based systems Benefits Joining Avint is a win-win proposition! You will feel the personal touch of a small business and receive BIG business benefits. From competitive salaries, full health, and generous time off and Federal Holidays. Additionally, we encourage every Avint employee to further their professional development. To assist you in achieving your goals, we offer reimbursement for courses, exams, and tuition. Interested in a class, conference, program, or degree? Avint will invest in YOU and your professional development! Salary range $115,000-125,000

Keywords: Avint, Washington DC , Information Systems Security Officer (ISSO) Senior, IT / Software / Systems , Washington, DC