Sr. Information System Security Officer

Who We Are:

Oasys International, LLC (Oasys) is a rapidly expanding firm that has been recognized on Inc. 5000 magazine's list of the fastest‑growing companies for five consecutive years. We’re a dynamic organization dedicated to providing world‑class technology consulting services through our team of expert technologists, consultants, engineers, and subject matter experts. At Oasys, we prioritize continuous learning, a healthy work‑life balance, and a collaborative work environment.

bastoint but a culture is merit‑based, recognizing and rewarding performance and fostering a supportive and social atmosphere.

Oasys is seeking a Sr. Information System Security Officer to support the United States Coast Guard (USCG) at the Aviation Logistics Center (ALC)-Information Systems Division (ISD). The Sr. Information System Security Officer (ISSO) will provide subject matter expertise in Risk Management Framework (RMF) execution, security control validation, continuous monitoring, and audit readiness to sustain the Authorization to Operate (ATO) lifecycle for mission‑critical systems.

The Senior ISSO will play a central role in ensuring systems maintain compliance with federal cybersecurity standards including NIST 800‑53, FISMA, and DHS 4300A, and will serve as a key security liaison across development, operations, and governance teams.

• Serve as the lead security representative for system RMF lifecycle activities, including control selection, implementation, testing, and documentation.
• Develop, review, and maintain key RMF artifacts such as System Security Plans (SSPs), Security Assessment Reports (SARs), Contingency Plans (CPs), and POA&Ms.
• Ensure systems maintain a valid Authorization to Operate (ATO) through continuous monitoring, vulnerability assessments, and compliance reporting.
• Validate the implementation of security controls and