Information System Security Engineer

SAIC; Arlington (VA); On-site; USD 120,001 - 160,000; Full time

Job summary

SAIC is seeking an Information System Security Engineer (ISSE) to join our team in Arlington, VA. This position requires an active TS/SCI clearance and involves implementing and maintaining cybersecurity controls in accordance with DoD policies, RMF, and STIGs.

You will monitor security, conduct vulnerability assessments, support RMF processes for ATO, prepare security documentation, and collaborate with IT and engineering teams to ensure security is integrated into system designs.

Qualifications

• Bachelor's degree in a technical field; five years' experience preferred or four years' substitute.
• Solid understanding of DoD cybersecurity policies and RMF guidance.
• Experience with security documentation and audits.

Responsibilities

• Implement and maintain cybersecurity controls per DoD policies, RMF, and STIGs.
• Monitor security events, analyze incidents, and respond promptly.
• Perform vulnerability assessments and remediation with DoD tools.
• Collaborate with IT, engineering, and program teams to embed security into designs.
• Prepare and maintain SSPs, POA&Ms, and risk assessments.
• Support RMF process for ATO and continuous monitoring.
• Assist with security audits and remediation of findings.
• Stay informed on emerging cyber threats and directives.

Skills

DoD cybersecurity

Network security

Authentication protocols

Scripting (PowerShell/Python)

Active Directory/Group Policy

Education

Bachelor's degree in a technical field

5 years of experience (4 years may substitute)

Tools

ACAS

ESS

SIEM platforms

Evaluate-STIG

STIG Viewer

Red Hat Enterprise Linux

Windows Server

Job description

Minimum Clearance Required TS.SCI

Job ID 2614441

Location Arlington, VA, US

Date Posted 2026-07-09

Category Cyber

Subcategory Cyber Engineer

Schedule Full-Time

Shift Day Job

Travel No

Clearance Level Must Be Able to Obtain None

Potential for Remote Work ORA_ON_SITE

Description

SAIC is seeking an Information System Security Engineer (ISSE) to join our team. This position is in Arlington, VA and requires an active Top Secret/SCI clearance.

Job Responsibilities

• Implement and maintain cybersecurity controls in accordance with DoD policies, including NIST SP 800-53, RMF, and applicable STIGs.
• Monitor network and system security, analyze security events, and respond to incidents in a timely manner.
• Conduct vulnerability assessments and remediation activities using approved DoD tools and processes.
• Collaborate with IT, engineering, and program teams to ensure security requirements are integrated into system designs and operations.
• Assist in the preparation, review, and maintenance of security documentation, including System Security Plans (SSPs), Plan of Action & Milestones (POA&Ms), and risk assessments.
• Support the Risk Management Framework (RMF) process for system accreditation and continuous monitoring, including activities related to obtaining and maintaining Authority to Operate (ATO).
• Participate in security audits, inspections, and assessments, and assist with remediation of findings.
• Stay current on emerging cyber threats, vulnerabilities, and DoD cybersecurity directives.

Qualifications

Education Requirements

• Bachelor’s degree and five (5) years experience; Four (4) years' experience can be considered in lieu of degree.

Clearance Requirements

• Must possess and maintain an active TS/SCI clearance; US Citizenship required.

Required Skills

• Experience with DoD cybersecurity tools (e.g., ACAS, ESS, SIEM platforms, Evaluate-STIG, and STIG Viewer).
• Familiarity with network protocols, firewalls, intrusion detection/prevention systems, and endpoint security.
• Experience with Network Access and Authentication to include RADIUS (NPS, ISE, ClearPass), 802.1X Wired/Wireless Authentication, and Device Posture Validation.
• Red Hat Enterprise Linux and Windows Server administration.
• Scripting language such as PowerShell or Python.
• Active Directory and Group Policy administration.
• Certifications CISSP / CASP+ / CISM / CCSP, Security+, Azure Security or Administrator Certifications, Network Security Certifications.

Desired Skills

• Experience working in a Microsoft Azure cloud environment.

Target salary range $120,001 - $160,000. The estimate displayed represents the typical salary range for this position based on experience and other factors.