Security Infrastructure Engineer

Leidos Holding$107K — $195K *
Information Technology
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree with 8+ years of experience, or equivalent military/work experience
  • 2+ years of hands-on experience with cybersecurity tools (IDS/IPS, SIEM, firewalls)
  • Practical knowledge of network protocols, traffic analysis, and routing/switching
  • Proficiency in Linux administration and shell scripting (Bash)
  • Active DoD Secret Clearance with TS/SCI eligibility required

Responsibilities

  • Develop and maintain Python-based tools and scripts for automation
  • Design and integrate custom APIs for cybersecurity tools
  • Evaluate and integrate AI/ML technologies for threat detection
  • Operate and upgrade core cybersecurity capabilities like IDS/IPS and SIEM
  • Manage tasks such as infrastructure outages and routine patching
  • Maintain accurate network topology for managed security equipment
  • Advise leadership on modern security infrastructure solutions

Benefits

  • Hybrid work model with partial telework
  • Opportunity to work on mission-critical security operations
  • Engagement with advanced AI/ML technologies
  • Continuous professional development and certification support
  • Collaboration with government leadership and experts in the field
Full Job Description
Leidos is seeking an AI & Security Infrastructure Integration Engineer to join our team in Alexandria, VA. This is a hybrid position allowing partial telework, but the majority of the time is spent on-site and candidates must be within commutable distance.

Position Overview

As an AI & Security Infrastructure Integration Engineer on our team, you will bridge the gap between traditional security infrastructure and modern programmatic defense. You will operate, maintain, and evolve the network security infrastructure utilized by our 24x7x365 mission-critical security operations team. Your primary focus will be transforming manual workflows into automated pipelines by leveraging Python, developing robust API integrations, and exploring AI/LLM orchestration to rapidly scale threat detection and response capabilities.

Primary Responsibilities
  • Develop and maintain Python-based tools, scripts, and frameworks to automate routine security infrastructure tasks, policy deployments, and system health checks.
  • Design, build, and integrate custom APIs to connect disparate cybersecurity tools (SIEM, IDS/IPS, Netflow, and threat intelligence feeds) into a cohesive, orchestrated ecosystem.
  • Evaluate and integrate AI/ML technologies and LLM-based solutions to optimize alert triage, automate playbook generation, and accelerate incident analysis for the SOC team.
  • Operate, maintain, and upgrade core cybersecurity capabilities (IDS/IPS, Netflow, SIEM, Snort, Linux, and Virtualization environments).
  • Manage high-priority tasks, infrastructure outages, and routine patching/updates.
  • Maintain precise network topology and elevation diagrams for all managed security equipment.
  • Ensure strict adherence to government compliance standards and coordinate changes through official Change Control Boards (CCB).
  • Advise and strategize with program and government leadership on engineering modern, code-driven security infrastructure solutions.


Required Clearance and Certifications
  • Active DoD Secret Required with DoD TS/SCI Eligibility
  • Must have DoD 8570 IAT II certification OR meet DoD 8140 Intermediate Cyber Defense Infrastructure Support Specialist requirements prior to start
  • Must obtain DOD-8570 CSSP Infrastructure Support certification within 6 months of hire.


Required Qualifications
  • Bachelor's degree with 8+ years of professional experience (additional relevant military or work experience may be considered in lieu of a degree).
  • 2+ years of hands-on experience deploying and maintaining cybersecurity tools (especially IDS/IPS, SIEM, or firewalls).
  • Strong, practical knowledge of network protocols, traffic analysis, and routing/switching.
  • Proficiency in Linux administration and shell scripting (Bash).


Preferred Qualifications
  • Strong proficiency in Python (specifically writing scripts for system automation, network interaction, and data parsing).
  • Demonstrated experience working with RESTful APIs, JSON/YAML data structures, and webhooks to integrate security platforms.
  • Exposure utilizing or fine-tuning AI/ML models, prompt engineering, or integrating AI APIs into operational workflows.
  • Hands-on experience with automation/orchestration frameworks (e.g., Ansible, Terraform, Puppet, or Chef).
  • Practical familiarity with Intelligence-Driven Defense, the Cyber Kill Chain, and mapping controls to the MITRE ATT&CK framework.
  • Prior experience working as or directly supporting a Security Operations Center (SOC) analyst team.


Original Posting:
August 12, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

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.

About Leidos Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

Explore Career Opportunities

Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

Internship Programs

For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

Benefits and Culture

Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

Join the Team

Leidos Holding is hiring! Explore job opportunities that match your skills and interests. Leidos Holding looks for driven, curious, and innovative individuals to join their team. Positions are available across various disciplines and experience levels.

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Prepare for Your Interview

To prepare for an interview at Leidos Holding, candidates should familiarize themselves with the company's missions and values, update their resumes, and be ready to discuss how their background and skills align with the position they are applying for.

Networking and Career Advancement

Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

Explore Leidos Holding Jobs and Careers

Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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