Information System Security Officer

General information

Requisition # R62701 Locations USA-VA-Chantilly Posting Date 08/14/2025 Security Clearance Required TS/SCI w/ Poly Remote Type Onsite Time Type Full time

Description & Requirements

Unlock the secrets of intelligence with MANTECH! Join a dynamic team at the forefront of national security, providing advanced solutions to government intelligence agencies. Since 1968, we’ve been solving the toughest challenges with groundbreaking tech. Explore thrilling projects in Digital Transformation, Cybersecurity, IT, Data Analytics and Software Development. Elevate your career and make a difference. Your adventure begins now—unleash your potential with MANTECH!

MANTECH seeks a motivated, career and customer-oriented Information System Security Officer ISSO to join our team in the Chantilly, VA area.

A qualified ISSO will help maintain the operational security posture of assigned information systems while collaborating closely with the Information System Security Manager ISSM. Ensure that cyber security requirements are effectively integrated into information systems’ operations, management, and documentation. Provide critical systems, application and infrastructure support to the customer and work with a team across multiple technical areas to include security and systems administration.

Responsibilities include, but are not limited to:

• Coordinate with government information system owners and industry partners to maintain compliance with customer requirements including supporting ICD 503 Assessments and Authorizations of industry partners’ systems
• Support the Assessment and Authorization process by performing risk assessments, preparing and reviewing documentation in accordance with the Risk Management Framework (RMF), identify deficiencies an provide recommendations for solutions, track Plan of Action and Milestones (POA&M) through mitigation and risk acceptance, and conduct weekly, monthly, and annual Continuous Monitoring (CONMON) activities
• Implement vulnerability management programs, including tracking and addressing IAVAs and security patches, accessing applicability to existing systems, and ensuring closure
• Perform data transfers between air-gapped systems at varying classification levels using tools for virus and dirty word scanning in accordance with media control and data transfer policies
• Assess and respond to security-related incidents, alerts, and requests to include software requests
• Prepare systems and components for disposal and assist industry partners with disposal of equipment
• Travel may be required up to 25% of the time CONUS

Minimum Qualifications:

• Bachelor’s degree and 4 or more years of relevant information system security experience
• Familiarity with information system security principles
• Experience with interfacing and briefing military, civilian, and contractor personnel at all levels
• Knowledge of security-related IC and DoD policies, procedures and operating instructions
• On