Network Engineer

Company Description

Join us and make YOUR mark on the World!

Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world‑changing impact advancing science and technology to strengthen U.S. security and promote global stability.

Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi‑domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

We have an opening for a Network Engineer
. You will primarily work in a classified environment to support LLNL's diverse enterprise network architecture by helping design and operate IP/MPLS backbone networks, cloud connectivity, and services such as VPN, Internet edge, DNS, remote access, wireless, and security across both unclassified and classified environments. You will install, configure, and maintain network hardware and software in a highly technical environment similar to a major service provider, with exposure to modern networking, AI‑assisted automation, and top vendors like Cisco, Palo Alto Networks, Aruba, AWS, Azure, and GCP.

This position is in the Enterprise Infrastructure Services (EIS) Division with the Computing Directorate, in support of LivIT and the Strategic Deterrence Group (SD).

This position requires full‑time on‑site presence due to the nature of the work.

This position will be filled at either the SES.
2 or SES.
3 level based on knowledge and related experience as assessed by the hiring team. Additional job responsibilities (outlined below) will be assigned if hired at the higher level.

• Collaborate on the design and architecture of campus, and datacenter networks utilizing advanced network technologies such as EVPN VXLAN, MPLS, and MVPN.
• Perform network administration and troubleshooting tasks to configure, operate, and maintain network equipment including switches, routers, firewalls, load balancers, and other equipment.
• Collaborate with Cyber Security Team to implement comprehensive network security architectures, policies, and monitoring.
• Engage with vendors to evaluate network products and services.
• Work in a fast‑paced and challenging environment, with multiple competing priorities, while managing to maintain sound judgement and excellent customer service.
• Work within the unclassified environment inside ENS until a Q clearance is obtained.
• Stay up to date with the latest industry network architectures and best practices.
• Perform occasional work outside normal business hours in order to provide support for network operations and maintenance activities.
• Participate in an on‑call duty rotation.
• Perform other duties as assigned.

• Design and deliver advanced, customized networks, in alignment with customer requirements and enterprise network strategies.
• Independently design, test, configure and effectively utilize network management and monitoring tools.
• Diagnose, resolve, and document complex network problems.

• Ability to obtain and maintain a US DOE Q‑level security clearance which requires U.S. Citizenship.
• Bachelors degree in Information Technology, Computer Science, Engineering, or related discipline, or the equivalent combination of technical training and related experience.
• Broad experience in network system design, configuration, implementation, documentation, and operations.
• Broad and in‑depth knowledge of and experience with network routing and switching, including OSPF, IS‑IS, or BGP, and Spanning‑tree.
• Familiarity with common network automation frameworks such as Ansible and Python.
• Broad and in‑depth knowledge of and experience in firewall configuration and maintenance, particularly Palo Alto NGFW.
• Comprehensive working knowledge of edge port security features, such as 802.1x.
• Broad experience of F5 Load Balancers.
• Proficient interpersonal and verbal and written communications skills, with the ability to work independently and interact with customers and team members.

• Significan…