Lead ISSO & Security Compliance Architect

Applied Information Sciences, Inc.; Washington (District of Columbia); On-site; USD 101,000 - 152,000; Full time

Benefits offered by this job

Employee Ownership

Continuous Learning

Inclusive Culture

Mission-Driven Work

Job summary

Applied Information Sciences, Inc. is seeking a Lead Security Engineer (ISSO) in Washington, DC to execute RMF-based security controls across systems, develop documentation, and oversee continuous monitoring.

This proposal-based role supports ATO activities and strong collaboration with ISSMs and system owners. The ideal candidate will bring 9+ years in cybersecurity, DoD-style certification, and hands-on tooling experience with Nessus, Splunk, Guardium, and WebInspect.

Qualifications

• Minimum 9+ years of work experience in computer science or cybersecurity related field.
• Minimum 7+ years of ISSO or ISS Engineer experience in a cleared environment.
• Bachelor's degree in Cybersecurity, Computer Science, IT, or related field. An additional 4 years of experience will be considered in lieu of a degree.
• DoD 8570/IAT Level III certification or equivalent (e.g. Security+)
• Hands-on experience with tools such as: Tenable Nessus / Security Center, Splunk, IBM Guardium, HP WebInspect, NMAP or similar tools
• Strong understanding of: RMF, NIST 800-53 security controls, System accreditation processes
• Active Top Secret clearance.

Responsibilities

• Perform documentation, testing, and ongoing assessment of security controls
• Ensure complete system scoping, including all assets, components, and technology stacks
• Clearly document and articulate control implementation in SSPs and related artifacts
• Lead activities supporting system ATOs and reauthorizations
• Ensure proper system lifecycle management, including decommissioning activities
• Maintain consistent and compliant continuous monitoring practices
• Coordinate with ISSMs, engineers, and system owners to resolve security findings

Skills

RMF

NIST 800-53

System accreditation

Top Secret clearance

ISSO/IS Engineer experience

Security controls documentation

Education

Bachelor's degree in Cybersecurity/CS/IT

4 years experience in lieu of degree

Tools

Tenable Nessus

Splunk

IBM Guardium

HP WebInspect

NMAP

Job description

Applied Information Sciences, Inc. is seeking a Lead Security Engineer (ISSO) in Washington, DC to execute RMF-based security controls across systems, develop documentation, and oversee continuous monitoring.

This proposal-based role supports ATO activities and strong collaboration with ISSMs and system owners. The ideal candidate will bring 9+ years in cybersecurity, DoD-style certification, and hands-on tooling experience with Nessus, Splunk, Guardium, and WebInspect.