Senior ISSO | Hybrid Role Protecting Mission-Critical Systems

Piper Companies; Washington (District of Columbia); Hybrid; USD 145,000 - 205,000; Full time

Benefits offered by this job

PTO

Paid Holidays

Medical Insurance

Dental Insurance

Vision Insurance

401K

Tuition Reimbursement

Sick Leave

Job summary

Zachary Piper Solutions is seeking a Senior Information Systems Security Officer (ISSO) to lead security compliance initiatives for government systems in a hybrid setup (3 days onsite, 2 days remote) across Reston, Annapolis Junction, or Washington, DC. The role emphasizes RMF accreditation activities, risk management, and continuous monitoring to strengthen enterprise cybersecurity posture.

The Senior ISSO will develop and maintain SSPs, POA&Ms, accreditation artifacts, and coordinate IATT/ATO

Qualifications

• 18+ years of cybersecurity, security engineering, systems engineering, or related experience.
• Experience with RMF, accreditation processes, and compliance management.
• Experience using XACTA and supporting IATT and ATO activities.
• Proficiency with Splunk.
• Experience implementing and assessing NIST 800-53 security controls.
• Experience with ICD 503 and related security frameworks.
• Experience developing and maintaining SSPs, POA&Ms, SAPs, and assessment documentation.
• Prior ISSO or ISSE experience.
• Current Security+ or equivalent IAT Level II/III certification.
• Active TS/SCI with Active Polygraph.

Responsibilities

• Conduct security assessments, evaluate compliance posture, and manage RMF activities supporting accreditation efforts.
• Develop and maintain SSPs, POA&Ms, accreditation documentation, and security artifacts within XACTA.
• Coordinate IATT and ATO activities with stakeholders, system owners, and Authorizing Officials.
• Implement, assess, and monitor NIST 800-53 security controls while supporting audit and assessment events.
• Collaborate with engineers, developers, administrators, and security personnel to maintain compliance and implement risk mitigation strategies, including Zero Trust principles.

Skills

RMF experience

Accreditation management

Risk management

Zero Trust

IATT/ATO coordination

Security+ IAT Level II/III

Tools

XACTA

Splunk

Job description

Zachary Piper Solutions is seeking a Senior Information Systems Security Officer (ISSO) to lead security compliance initiatives for government systems in a hybrid setup (3 days onsite, 2 days remote) across Reston, Annapolis Junction, or Washington, DC. The role emphasizes RMF accreditation activities, risk management, and continuous monitoring to strengthen enterprise cybersecurity posture.

The Senior ISSO will develop and maintain SSPs, POA&Ms, accreditation artifacts, and coordinate IATT/ATO