Senior Network Engineer

Join us and make YOUR mark on the World!

Are you interested in joining some of the brightest talent in the world to strengthen the United States’ security? Come join Lawrence Livermore National Laboratory (LLNL) where our employees apply their expertise to create solutions for BIG ideas that make our world a better place.

We are dedicated to fostering a culture that values individuals, talents, partnerships, ideas, experiences, and different perspectives, recognizing their importance to the continued success of the Laboratory’s mission.

Pay Range

$168,780 - $214,032 annually for SES.3

$202,500 - $256,824 annually for SES.4

We have an opening for a Senior Network Engineer to provide advanced level engineering in the areas of network design, configuration, and management considering emerging technologies, best practices, and industry standards. You will articulate advanced networking concepts to programmatic management and systems architects to collaboratively design a cohesive, structured, and secured network environment. The position is in the Livermore Computing (LC) Division’s Network and Security Operations Group within the Computing Directorate.

Business needs require that this position have an on-site presence multiple days a week.Telecommuting options will be limited.

This position will be filled at either 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.

You will

• Provide SME-level knowledge in configuring and troubleshooting VLANs, routing protocols, software defined networks (SDN), policy-based routing, spanning tree protocol, and firewalls in large, complex networks, network services, enterprise services and applications relating to network technologies.
• Architect and implement complex HPC datacenter networks, utilizing modern networking overlay technologies including EVPN, VXLan, Cisco Application Centric Infrastructure (ACI), etc.
• Design and implement enterprise-class network infrastructure based on technology from Cisco, Arista, Palo Alto Networks, F5, and other related network technologies.
• Provide advanced network troubleshooting and advanced operational support in Linux environments, network security, as well as support for edge, core, distribution, and access layers of the network.
• Perform other duties as assigned.

Additional job responsibilities, at the SES.4 level

• Develop innovative solutions that will lead to a cohesive, structured, and secured network environment in collaboration with team members.
• Define network requirements and solutions to meet customer needs while interfacing with LLNL customers.

• Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
• Bachelor’s degree in Computer Science, Engineering, or Information Systems or related field, or the equivalent combination of education and related experience.
• Advanced ability to troubleshoot infrastructure capacity/performance problems and provide proposed solutions.
• Significant experience configuring and managing a medium to large datacenter and enterprise networks in LAN & WAN environments, including significant experience troubleshooting complex issues within those environments.
• Significant experience supporting secure, highly reliable enterprise networks with comprehensive knowledge of L2/L3 network principles and routing protocols, and experience designing, configuring, operating, monitoring, and management of switches and routers or equivalent network equipment.
• Advanced knowledge of the standards governing bot TCP/IP and Ethernet.
• Advanced written and verbal communication skills to prepare, present, document, and explain technical information, effective interpersonal skills, and the ability to collaborate in a multi-disciplinary team environment and to interact with all levels of management and staff.
• Ability to support occasional schedule-driven project deliverables and off-hours infrastructure upgrades with the ability to participate in after-hours on-call rotation.

Additional qualifications at the SES.4 level

• Demonstrated ability to make sound technical decisions in high-pressure or complex scenarios, including the ability to troubleshoot highly complex infrastructure capacity / performance problems and provide advanced solutions.
• Substantial experience designing and operating Data Center infrastructure and leading significant network improvement or deployment projects.
• Expert-level skill and knowledge of networks and network-based security technologies.

Qualifications We Desire

• Advanced knowledge of computer science fundamentals in algorithms and data structures and / or computer networking fundamentals, including proficiency in one or more scripting languages, such as Python, Perl.
• Experience configuring and managing HPC networks, and experience troubleshooting networks, services, and systems within an HPC environment.

#LI-Hybrid

Position Information

This is a Career Indefinite position, open to Lab employees and external candidates.

Why Lawrence Livermore National Laboratory?

• Included in 2025 Best Places to Work by Glassdoor!
• Flexible Benefits Package
• 401(k)
• Relocation Assistance
• Education Reimbursement Program
• Flexible schedules (*depending on project needs)
• Our values - visit https://www.llnl.gov/inclusion/our-values

Security Clearance

This position requires a Department of Energy (DOE) Q-level clearance.  If you are selected, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing.  Q-level clearance requires U.S. citizenship. 

Pre-Employment Drug Test

External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

Wireless and Medical Devices

Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the use and/or possession of mobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mobile device in your possession.  This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices.  

If you use a medical device, which pairs with a mobile device, you must still follow the rules concerning the mobile device in individual sections within Limited Areas.  Sensitive Compartmented Information Facilities require separate approval. Hearing aids without wireless capabilities or wireless that has been disabled are allowed in Limited Areas, Secure Space and Transit/Buffer Space within buildings.

How to identify fake job advertisements

Please be aware of recruitment scams where people or entities are misusing the name of Lawrence Livermore National Laboratory (LLNL) to post fake job advertisements. LLNL never extends an offer without a personal interview and will never charge a fee for joining our company. All current job openings are displayed on the Career Page under “Find Your Job” of our website. If you have encountered a job posting or have been approached with a job offer that you suspect may be fraudulent, we strongly recommend you do not respond.

To learn more about recruitment scams: https://www.llnl.gov/sites/www/files/2023-05/LLNL-Job-Fraud-Statement-Updated-4.26.23.pdf

Equal Employment Opportunity

We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws.

Reasonable Accommodation

Our goal is to create an accessible and inclusive experience for all candidates applying and interviewing at the Laboratory.  If you need a reasonable accommodation during the application or the recruiting process, please use our online form to submit a request. 

California Privacy Notice

The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitles job applicants, employees, and non-employee workers to be notified of what personal information LLNL collects and for what purpose. The Employee Privacy Notice can be accessed here.