Leidos Digital Modernization Sector is looking for a APPGATE Engineer to work on the Army Global Unified Network (AGUN) – Increment 1 (INC1) program. The Global Enterprise Network Modernization – OCONUS (GENM-O) is a critical mission provider responsible for keeping the Army connected through global network modernization projects. The Army Global Unified Network (AGUN) - Increment 1 (INC1) will unify the next generation of Army transport to comply with the Joint Regional Security Stack (JRSS) divestiture mandate. A phased systematic approach is required to provide individual sites with standardized, updated technology systems to ensure the Army’s Information Technology (IT) infrastructure is equipped to provide soldiers with cutting-edge technology to ensure applications, data, and enterprise services are accessible, trusted, and interoperable across the globe.
Primary Responsibilities:
Build and maintain new APPGate environment for the AGUN program.
Mentor junior members of the team in rolling out and maintaining new solutions / Implementations.
Work with O&M team to develop and Maintain knowledge base and TTPs.
Work with security teams to secure AppGate environments with the latest patches and configurations.
Develop and maintain APPGATE best practices.
Work with other engineering disciplines to troubleshoot enterprise issues with in the AGUN environment.
Performed vulnerability scans and implemented patching strategies to secure network infrastructure.
Basic Qualifications:
Must currently possess and be able to maintain an active DoD SECRET security clearance. (US Citizenship required)
Holds an active DoD 8570 IAT-II certification.
Typically requires BS degree and 8 – 12 years of prior relevant experience or Masters with 6 – 10 years of prior relevant experience. A combination of education and experience will be considered in lieu of a degree.
Appgate SDP Administrator certification
5 or more years’ experience with 2 or more of the following technologies:
Zero Trust & Appgate: Appgate Secure Access (SDP/ZTNA), Single Packet Authorization (SPA), Context-based Policies, Zero Trust Architecture, Access Control.
Cisco RAVPN solutions
Automation & Scripting: Terraform, Python, PowerShell, RESTful APIs, Infrastructure as Code (IaC).
Demonstrated experience working within the Agile framework.
Preferred Qualifications:
Prior experience working within Army’s IT infrastructure.
Direct or indirect experience working on the Joint Regional Security Stacks.
Networking & Security: TCP/IP, DNS, VPN (IPSec, SSL), Firewalls, IDS/IPS, LDAP, RADIUS, SAML, OIDC, PKI, TLS.
Operating Systems: Linux (e.g., RHEL, Ubuntu), Windows.
Containerization: Docker, Kubernetes.
At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”
If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.
Original Posting:September 11, 2025For 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.
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.
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What We Do
We Are Leidos
For 50 years we have been tackling some of the biggest problems that face our nation and our world.
OUR MISSION
Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020.
Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®.
Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos.
Your most important work is ahead.
