Senior Information System Security Officer (ISSO)

About the role

The Senior Information System Security Officer (ISSO) is responsible for supporting all portfolio level documentation for 30+ applications, coordinating and collaborating with the government client, and assisting teams in best practices around vulnerability remediation.

Responsibilities

• Support the implementation and sustainment of security controls in alignment with the NIST Risk Management Framework (RMF).
• Ensure compliance with FDIC and NIST cybersecurity policies and frameworks.
• Maintain system Authorization to Operate (ATO) status for 30+ applications.
• Operate and maintain 30+ applications, including initiatives around Cloud Migration.
• Create and maintain documents such as Security Impact Analysis (SIAs), POA&Ms, and Security and Privacy Control Assessments (SCAs).
• Develop and maintain knowledge management across programs.
• Support project teams and promote collaboration across work streams.
• Identify and address false positives related to unused libraries or other findings.
• Conduct monthly sessions with government clients to review documentation updates and attend regular meetings for workstream support.
• Collaborate with agency and external partners to support cybersecurity risk reduction and resilience.

Qualifications

• Minimum 10 years of overall experience, with preference for experience in portfolio and O&M support.
• Knowledge of security controls, particularly in a government setting.
• Experience supporting systems in Cloud environments and Agile/DevOps environments.
• Desired certifications include CISSP, CASP, CISA, CEH, and CISM.

Skills

• Initiative, organization, responsibility, and strong customer service skills.
• Flexibility and adaptability to a fast-paced, fluid business environment.
• Effective communication and decisive problem-solving abilities.
• Ability to hold training sessions and provide office hours to support project teams.
• Experience with scanning tools and supporting ATO packages.
• Understanding of FS-191, operational directives, and compliance requirements.
• Knowledge of NIST RMF (SP 800-37) and NIST SP 800-53 controls (Rev 4 & Rev 5), CNSSI 1253.

Benefits

• 15 days of PTO including paid parental, military, and bereavement leave.
• Eleven (11) paid Federal holidays, with five of which are floating holidays.
• Health and Dental Insurance (with 100% employer-paid premiums).
• Life Insurance, STD/LTD term disability coverage (with employer-paid premiums).
• 401(k) plan with a match that is 100% vested after two years of service.
• FSA/DFSA/HSA flexible benefit plans.
• Annual Tuition & Professional Development Reimbursement benefit.

Pay and Benefits Information

The likely salary range for this position is $119,000 - $170,000. This is not, however, a guarantee of compensation or salary. There are multiple factors that are considered in determining final pay for a position, including, but not limited to, relevant work experience, skills, certifications and competencies that align to the specified role, education and certifications as well as contract provisions regarding labor categories that are specific to the position and could fall outside of this range.

Application Deadline

The application deadline for this position is August 24, 2026.

Company Overview

Alpha Omega is an award-winning solutions provider dedicated to delivering mission-enabling technology and strategic solutions for our customers. Founded in 2016, we have grown to over 700 employees nationwide, consisting of former operators, technologists, and strategists who bring decades of government and industry experience. We support agencies such as the Department of Homeland Security (DHS), Navy, Air Force, Army, and the Department of State (DOS) in the National Security unit, and agencies such as the Federal Deposit Insurance Corporation (FDIC), Treasury, Health & Human Services (HHS), National Institutes of Health (NIH), National Oceanic and Atmospheric Administration (NOAA) and the United States Department of Agriculture (USDA) in the National Resilience unit. We are committed to delivering high-impact solutions through strategic partnerships, intellectual property, and relentless drive for innovation. Alpha Omega is proud to be a Virginia Best Places to Work 8 times, an Inc. 5000 honoree 7 times, and a Washington Post Top Workplaces 4 times. Join us in driving transformation that secures the nation's future.

Culture and Values

We are guided by our core values—Harmony, Engagement, Accountability, Resourcefulness, and Tenacity (HEART)—which foster a culture of innovation, collaboration, and continuous learning. We invest in top talent through mentorship, growth, and meaningful work. We value individuality, reward integrity, and foster a diverse, high-performing team united by purpose-at work, in service, and in the community.

Equal Opportunity Employer

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.