Information Systems Security Manager (ISSM)

Adelphi • Washington, DC

1d

About The Position

As Adelphi’s ISSM, you will own the company’s security program and drive its work through Department of War authorization on the IL2 (NIPR) path and toward a defensible IL5 trajectory. You will operate on a continuous-ATO cadence aligned with the engineering team’s weekly sprint pace. The role combines security architecture, compliance program management, and day-to-day security operations. You will serve as the primary interface to the Department of War Authorizing Official, assessors, and the customer program office, working closely with a small, high-velocity engineering team.

Adelphi builds AI/ML-enabled secure data access and sharing technology for U.S. intelligence and defense communities. Its Connector product enables federated data discovery. The company’s mission is to eliminate data silos, build trust in automation without compromising security, and improve information flow across mission-critical environments.

Requirements

• Active Top Secret/SCI clearance.
• At least 8 years of experience in cybersecurity, information assurance, or security engineering, with a substantial portion directly supporting DoD or IC systems.
• Prior ISSM or ISSO experience on a DoD or IC contract.
• Personally led at least one DoD or IC system through the NIST RMF authorization process to an ATO and sustained it through continuous monitoring.
• A current DoD 8140 / 8570 IAM-qualifying certification at hire, maintained throughout the role.
• Experience owning a government security program end-to-end, from initial authorization through continuous monitoring.
• Technical depth in security architecture across identity, authorization, cryptography, and audit.
• Experience in environments where security boundaries between systems matter, and ability to design for those boundaries.
• Experience running security operations and leading incident response in complex environments.
• Experience serving as the primary security interface to government customers, assessors, and internal engineering leadership.

Nice To Haves

• Prime contractor experience.
• Experience with FedRAMP inheritance modeling and CSP shared-responsibility mapping.
• Familiarity with AI agents and security of their interactions with data and tools.
• Familiarity with Palantir Foundry, O365/SharePoint, or Databricks in classified or IL5 environments.
• CISSP or CISM (IAM Level III); CASP+ is accepted.
• Experience establishing a security program at a startup or small company.

Responsibilities

• Own Adelphi’s security program.
• Drive the company’s authorization work through the Department of War IL2 (NIPR) path and toward an IL5 trajectory.
• Operate the security program on a continuous-ATO cadence aligned with weekly engineering sprints.
• Manage security architecture, compliance program management, and day-to-day security operations.
• Serve as the primary security interface to the Department of War Authorizing Official, assessors, and the customer program office.
• Work closely with the engineering team to advance security work without becoming a bottleneck.
• Lead security operations and incident response.
• Write clear, structured findings for technical and executive audiences.
• Maintain certification currency throughout the role.

Benefits

• Healthcare coverage with 100% of the employee premium and 50% of dependents’ premium covered for a platinum-level plan.
• 401K with 2% company match.
• $500 monthly physical and mental health reimbursement program.
• Unlimited time-off policy.
• Competitive salary and equity compensation.
• Opportunity to work on impactful projects in the national security sector.
• Career growth and leadership opportunities in a dynamic, innovative environment.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed