CSfC Network Engineer Subject Matter Expert (SME)

Leidos•Fort Belvoir, VA

5d•Onsite

About The Position

Leidos is seeking an experienced Network Engineer (SME) to join our Integrated Information Technology Support Services (I3TS) team. This role will support an extensive digital modernization program critical to the Defense Threat Reduction Agency (DTRA) in Fort Belvoir, VA. The Network Engineer will work closely with Leidos and Government technical leadership to drive innovation, growth, and efficiencies within the I3TS portfolio. A TS/SCI clearance and U.S. Citizenship are required.

Requirements

Bachelor's degree or higher in Computer Science, Information Technology, Engineering, Engineering Management, Management Information Systems, or related STEM degree program, and 12-15 years of relevant experience. Specific experience, education and training may be considered in lieu of degree.
12+ years of progressive network engineering experience within DoD/DoW, federal, or defense contractor enterprise environments.
Active TS/SCI Clearance.
Active DoD 8570.01-M / DoD 8140 IAT Level II or III baseline certification (e.g., Security+ CE, CySA+, CASP+, or CISSP).
Active Computing Environment certification, including one or more of: Cisco CCNA, CCNP, Aruba ACSA or ACSP.
Proven expertise configuring Cisco (IOS-XE/ASR) and Aruba (Mobility Controllers/Gateways) IPsec and SSL VPNs, including IKEv2, Suite B/CNSA cryptography, and dynamic routing (BGP, OSPF).
Demonstrated engineering experience with Palo Alto Networks firewalls (PAN-OS), Panorama central management, and advanced IDS/IPS inspection profiles.
Hands-on deployment experience with both Cisco ISE and/or Aruba ClearPass implementing 802.1X, EAP-TLS authentication, and role-based access policies.
Strong working knowledge of X.509 certificates, CA hierarchy integration, certificate revocation lists (CRLs), OCSP, and secure NTP stratum synchronization.
Direct prior experience preparing and successfully registering NSA CSfC Capability Package solutions (Mobile Access, Multi-Site Connectivity, or Campus WLAN).
Deep understanding of Commercial National Security Algorithm (CNSA) Suite requirements, post-quantum readiness considerations, and hardware security modules (HSMs).

Nice To Haves

Campus Wireless LAN (WLAN) experience.
Familiarity with Ansible, for automating network device configuration backups, policy compliance checks, and certificate rotations.
Certified in any of the following - Cisco CCNP/CCIE (Security or Enterprise), Palo Alto PCNSE, Aruba Certified ClearPass Expert (ACCX), or Aruba Certified Mobility Expert (ACMX).

Responsibilities

Architect and operate secure, dual-layer cryptographic boundaries utilizing Cisco and Aruba IPsec/SSL VPNs and dynamic routing (BGP/OSPF) in strict compliance with NSA Capability Packages.
Author and tune Palo Alto NGFW security policies and IDS/IPS threat prevention signatures.
Implement enterprise network access control and 802.1X policies via Cisco ISE and Aruba ClearPass.
Integrate enterprise PKI/OCSP services and hardened NTP.
Generate key engineering artifacts required for NSA CSfC PMO registration and compliance auditing.
Architect, deploy, and maintain CSfC infrastructure operating within Black/Gray/Red networks.
Design, configure, and maintain multi-layered Commercial Solutions for Classified (CSfC) architectures in alignment with NSA Mobile Access (MA), Multi-Sight (MSC) Capability Packages, with Campus Wireless LAN (WLAN) experience as a bonus.
Ensure strict compliance with vendor diversity and dual-tunnel encryption mandates.
Understand the NIAP approved list and monitor for changes.
Implement enterprise routing protocols (BGP, OSPF) alongside redundant outer and inner IPsec VPN tunnels across Cisco and Aruba appliances.
Configure remote access SSL VPNs and ensure end-to-end traffic separation.
Optimize and audit Palo Alto Networks firewalls (PAN-OS), Panorama central management, and advanced IDS/IPS inspection profiles.
Manage Cisco Identity Services Engine (ISE) and Aruba ClearPass policy managers for 802.1X network access control, RADIUS/TACACS+ administration, posture assessment, and endpoint profiling.
Manage X.509 certificate lifecycles, Certificate Authorities (CAs), CRL/OCSP validation, and hardened, authenticated Network Time Protocol (NTP) infrastructure.
Prepare CSfC compliance artifacts, Key Management Plans (KMPs), Continuous Monitoring Plans (CMPs), and registration packages for NSA CSfC PMO submission.
Automate network device configuration backups, policy compliance checks, and certificate rotations using Ansible.