June 18, 2026For 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. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
- Enterprise security experience with Checkpoint/Fortinet Firewalls, F5, Cisco platforms (ASRs, Nexus, Catalyst), routing (OSPF, EIGRP, BGP), Layer 2 STP, dot1x/EAP, NAC, TCP/IP/UDP troubleshooting (Wireshark/tcpdump). This position ensures maximum security, performance, and availability of infrastructure while providing 2nd/3rd level support in a 24x7 environment.
Key Responsibilities:
- Design, build, and maintain Checkpoint and Fortinet firewall infrastructure, including architecture for Internet/Extranet connectivity.