Senior Information Systems Security Officer

Data Intelligence LLC; Vienna (VA); On-site; USD 83,000 - 96,000; Part time

Job summary

Data Intelligence, LLC in Vienna, VA seeks a part-time Information Systems Security Officer (ISSO) to support a federal client in national security operations. The position is on-site in Vienna, VA, 8 hours per week, and involves ensuring compliance, risk management, and cyber defense.

Candidate must have at least five years as an ISSO or similar role, familiarity with NIST/ISO/CIS controls, and experience with incident response. Top Secret/SCI with CI Polygraph clearance is required.

Qualifications

• Minimum of five years as an ISSO or in a closely related cybersecurity role.
• Experience supporting 24/7 operational systems.
• Strong knowledge of federal cybersecurity practices and policies.
• Hands-on incident response, investigation and management experience.
• Familiarity with NIST, ISO 27001, and CIS Controls.
• Experience with security tooling: firewalls, IDS/IPS, SIEM.
• Knowledge of data encryption and cryptographic key management.
• Experience ensuring FISMA compliance and agency standards.
• Windows and Linux security features and controls knowledge.

Responsibilities

• Support system security planning, implementation, and maintenance.
• Ensure compliance with agency policies, FISMA, and regs.
• Monitor security controls and respond to incidents and events.
• Conduct risk assessments and develop mitigations.
• Maintain SSPs, POA&Ms, and security documents.
• Coordinate with stakeholders on A&A activities and continuous monitoring.

Skills

ISSO / cybersecurity leadership

NIST CIS Controls

FISMA compliance

Incident response

Windows & Linux security

Security monitoring (SIEM)

Threat monitoring

Network security fundamentals

Cryptographic key management

Documentation (SSP/POA&M)

Tools

SIEM platforms

Firewalls

IDS/IPS

Threat monitoring tools

Job description

Data Intelligence, LLC is seeking a part-time skilled Information Systems Security Officer (ISSO) to support a top-tier federal client engaged in national security and counterterrorism operations. This position, based in Vienna, VA, plays a critical role in securing complex IT systems in a high-visibility, mission-driven environment. The selected candidate will work closely with government and contractor stakeholders to ensure compliance, manage risk, and defend against evolving cyber threats.

This position is part-time andis for 8 hours per week. The work location is fully on-site in Vienna, VA.

Key Responsibilities:

• Support system security planning, implementation, management, and maintenance in accordance with federal cybersecurity standards and requirements.
• Ensure compliance with agency security policies, FISMA, and other applicable regulations.
• Monitor and manage security controls and respond to cybersecurity incidents and events.
• Conduct system risk assessments and develop appropriate mitigation strategies.
• Maintain and update system security plans (SSPs), POA&Ms, and other security documentation.
• Coordinate with stakeholders on A&A activities and provide continuous monitoring of system security postures.

Required Experience:

• Minimum of five (5) years of professional experience serving as an Information Systems Security Officer (ISSO) or in a closely related cybersecurity role.
• Experience supporting systems within a 24/7 operational environment.
• Strong understanding of systems security requirements, cybersecurity policies, and federal information security practices.
• Hands-on experience supporting cybersecurity incident response, investigation, and management.
• Familiarity with recognized cybersecurity frameworks and standards, including NIST, ISO 27001, and CIS Controls.
• Experience using threat monitoring and security event management platforms.
• Working knowledge of cybersecurity technologies and tools, including firewalls, IDS/IPS solutions, and SIEM platforms.
• Understanding of network protocols, network architecture, and associated security considerations.
• Knowledge of data encryption methods and cryptographic key management practices.
• Experience supporting compliance with FISMA and related federal cybersecurity requirements.
• Working knowledge of Windows and Linux operating systems and their associated security features and controls.
• Experience developing, implementing, or maintaining internal security policies, agency standards, and cybersecurity procedures.
• Proficiency with cybersecurity risk assessment, risk analysis, and risk management methodologies.
• Hands-on experience configuring, administering, or managing cybersecurity tools and security systems.

Required Certifications (One or more):

• CISSP
• CISSO
• CISM
• CISA

Security Clearance:

• Top Secret / SCI with CI Polygraph

Why Join Data Intelligence, LLC:

Join a mission-driven team where your cybersecurity expertise directly supports U.S. national security. At Data Intelligence, LLC, we offer competitive compensation, a collaborative culture, and the opportunity to work alongside top talent in support of our country’s most critical operations.

Data Intelligence, LLC 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, or protected veteran status and will not be discriminated against on the basis of disability.