Senior ISSO: RMF, ATO, and Security Compliance Lead

Base-2 Solutions, LLC; Maryland; On-site; USD 110,000 - 150,000; Full time

Job summary

Base-2 Solutions is seeking an Information System Security Officer to work with application leads, system administrators, database administrators, developers, and testers to ensure systems achieve or maintain Authority to Operate (ATO).

The role focuses on RMF execution, loading Xacta artifacts, and updating SSPs, SCTMs, STPs, and POAMs while collaborating with the ST&E team, ISSMs, and SCAs to mitigate findings and sustain secure operations.

Qualifications

• Bachelor’s degree in computer science, software engineering, or a field applicable to the position.
• 9 or more years of relevant experience required with a Bachelor’s degree.
• Additional experience may be considered in lieu of degree.
• Demonstrated experience in developing, implementing, and enforcing security policies, standards, and procedures to ensure regulatory compliance and protect organizational information assets.
• Proven track record in conducting risk assessments and identifying vulnerabilities in systems, networks, and applications.
• Experience in developing and overseeing implementation of mitigation strategies to reduce security risks.
• Strong background in monitoring systems and networks for security breaches and suspicious activity.
• Successful history of responding to security incidents, investigating root causes, and implementing corrective actions.

Responsibilities

• Work with application leads, system administrators, database administrators, developers, and testers to ensure assigned systems are security compliant and achieve or maintain ATO.
• Follow the RMF process for full test, partial test, continuous monitoring (CONMON), and no test scenarios.
• Update Xacta documentation including SSPs, SCTM, STPs, and POAMs.
• Load artifacts such as STIG checklists and ACAS scans.
• Help implement STIG checklists and mitigate scan findings.
• Answer questions to ensure systems are developed with security compliance built in.
• Support security assessment events and respond to all questions from the PAT team, ISSMs, and SCAs.

Skills

RMF process

Risk assessments

Vulnerability management

Security incident response

Xacta documentation

STIG/ACAS loading

Regulatory compliance

Security policies and standards

Education

Bachelor’s degree in Computer Science / Software Engineering

High School with 13 years experience

Associate degree with 11 years experience

Master’s degree with 7 years experience

PhD with 5 years experience

Tools

Xacta

STIG checklists

ACAS

Job description

Base-2 Solutions is seeking an Information System Security Officer to work with application leads, system administrators, database administrators, developers, and testers to ensure systems achieve or maintain Authority to Operate (ATO).

The role focuses on RMF execution, loading Xacta artifacts, and updating SSPs, SCTMs, STPs, and POAMs while collaborating with the ST&E team, ISSMs, and SCAs to mitigate findings and sustain secure operations.