IT Infrastructure Security Specialist

At Leidos, we deliver innovative solutions guided by our commitment to deliver mission success for our customers. Our Mission, Vision, and Values guide the way we do business serving government and commercial customers with smarter, more efficient digital and mission innovations.

The Leidos Digital Sector is seeking a highly skilled and experienced IT Infrastructure Security Specialist to support mission critical security operations and safeguard enterprise information systems and infrastructure. The IT Infrastructure Security Specialist will perform tasks associated with conducting employee background checks, processing and coordinating personnel security clearance investigations, and ensuring compliance with security policies and procedures.

The IT Infrastructure Security Specialist will:

• Analyze security alerts, investigate cyber and physical security incidents, and coordinate response actions.
• Conduct vulnerability assessments and risk evaluations across IT and facility environments.
• Monitor and correlate cyber and physical access events to identify potential insider threats or unauthorized access.
• Implement and maintain security controls for networks, servers, virtualization platforms, cloud services, and supporting facilities.
• Coordinate implementation and sustainment of physical security measures including controlled access systems, surveillance systems (CCTV), intrusion detection systems (IDS), and badge/access management for data centers and IT spaces.
• Manage receipt of security documents submitted from applicants.
• Verify the appropriate level of background investigation being requested.
• Ensure all documents required for suitability processing are included and completed properly.
• Conduct agency checks and evaluates results including but not limited to credit reports and processing fingerprint cards.
• Identify potential reciprocity and previous investigations.
• Assist other teams (Investigations, EOD, File Room, etc.) on special projects as needed.

Required Education and Experience:

• Requires a current Secret Security Clearance.
• Requires a Bachelor’s degree with 8+ years of prior IT relevant experience or Master’s degree with 6 + years of prior IT relevant experience.

Required Skills:

• Ability to consistently make good decisions through a combination of analysis, experience, and judgment.
• Strong organizational skills with the ability to work on multiple projects with multiple deadlines.
• Excellent written, verbal, visual/presentation, interpersonal and communications skills.
• MS Office and the ability to navigate between multiple programs simultaneously.

Clearance Required:

• Must possess an active Top Secret security clearance at time of consideration.

ECNOMS

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

October 14, 2026

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.