Network Engineer AppGate Security Clearance

Position: Network Engineer AppGate with Security Clearance
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- Description 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 App Gate 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, Power Shell, 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. 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:
September 11, 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. Pay Range:
Pay Range $ - $ 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 Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more…