Insider Threat Program Senior System Engineer

Leidos; Fairfax (VA); On-site; USD 148,850 - 269,075; Full time

Job summary

A defense and technology company in Virginia is seeking a Senior System Engineer to support cybersecurity initiatives. Responsibilities include designing architectures and enhancing systems for the Insider Threat Program. Ideal candidates will have 15+ years of IT experience, expertise in operating systems and networking protocols, and familiarity with cloud platforms. This role offers a competitive salary range of approximately $148,850 - $269,075 annually.

Qualifications

• 15+ years of prior relevant experience or Master's with 13 years.
• Strong proficiency in operating systems: Windows Server, Linux.
• Experience with virtualization and cloud platforms.

Responsibilities

• Create design architectures and deploy enhancements.
• Support engineering functions in designing solutions.
• Develop documentation to capture configuration baseline.

Skills

Windows Server

Linux (RHEL)

Virtualization platforms: VMware

Networking protocols (TCP/IP, DNS, DHCP)

Cloud platforms: AWS, Azure, GCP

PowerShell

Bash

Python

Terraform

Splunk

Nagios

Prometheus

ELK Stack

Ansible

Puppet

Chef

JIRA

Identity and access management (IAM)

Active Directory

NIST standards

Education

Bachelor's degree

Master's degree in relevant field

Tools

Cisco Networking Concepts

Oracle

Microsoft SQL Server

PostgreSQL DBMS

Job description

Description

The Digital Modernization Sector at Leidos currently has an opening for a Senior System Engineer supporting the HEITS Contract as part of the Department of Homeland Security (DHS) Insider Threat Program (ITP). This is an exciting opportunity to use your experience to design, develop, and advance the ITP cybersecurity infrastructure baseline. The ITP mission is to identify insider threats to the department by utilizing advanced analytics, monitoring, and data correlation which in turn help address and eliminate potential threat actors from compromising the DHS mission in safeguarding the homeland.

The selected candidate will be responsible for the following:

Creating new design architectures, Engineering and deploying the enhancements to support the ITP mission. Developing and maintaining an architectural roadmap across all ITP infrastructure functions to guide the future of the ITP program. Evaluate all ITP changes to assess for functional, security, and cost risks. Support all engineering functions in helping to design new solutions and strategies for supporting ITP functionality. Support all documentation to effectively capture the configuration baseline. Support performance management to ensure key metrics are tracked and captured reflecting the efficacy and performance of the enterprise. Develop chart decks and artifacts to support the customer in articulating the design and functional baseline of the ITP enterprise to stakeholders.

Basic Qualifications

• Bachelors degree and (15)+ years of prior relevant experience or Masters with (13) years of prior relevant experience

• Strong Proficiency in operating systems: Windows Server, Linux (RHEL)

• Experience with virtualization platforms: VMware,

• Strong understanding of networking protocols (TCP/IP, DNS, DHCP, VPN, VLANs)

• Familiarity with cloud platforms: AWS, Azure, GCP

• Scripting and automation: PowerShell, Bash, Python, Terraform

• Monitoring and logging tools: Splunk, Nagios, Prometheus, ELK Stack

• Configuration management: Ansible, Puppet, Chef, JIRA

• Backup and disaster recovery systems

• Identity and access management (IAM), Active Directory, LDAP

• Working knowledge of defense-in-depth principles, network/HW/SW security architecture, network topology, IT device integrity, and common security elements

• Knowledge of NIST, STIGS, FISMA, or FedRAMP standards

• Experience implementing STIGs and hardening systems

• Familiarity with endpoint protection, SIEM integration, and vulnerability management

• Understanding of zero-trust architecture and secure system design

• Ability to obtain DHS EOD SCI

Preferred Qualifications

• Master’s degree from an accredited college or university in IT Management, Engineering, or related field

• Proven experience (10+ years) in IT service delivery management

• Experience with User Activity Monitoring products and platforms

• Experience with Everfox High Speed Guard Platform

• Experience with Cisco Networking Concepts

• Experience with On Premise Systems Infrastructure

• Experience with Oracle, Microsoft SQL Server, or PostgreSQL DBMS platforms

Pay Range

$148,850.00 - $269,075.00

Original Posting

October 2, 2025
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.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.