Information Systems Security Engineer - ACTIVE SECURITY CLEARANCE REQUIRED

LLNL; Livermore (CA); On-site; USD 176,000 - 267,000; Full time

Benefits offered by this job

Employee Referral Bonus $1500

On-site work environment

Job summary

Lawrence Livermore National Laboratory (LLNL) is seeking an Information Systems Security Engineer (ISSE) to provide cyber and technical support for classified networks, standalone systems, and security tools for vulnerability management, patch management, and auditing.

You will manage complex security plans, lead incident response, and drive large-scale security projects within the ITS Division for the Field Intelligence Element (FIE).

Job description

Information Systems Security Engineer - ACTIVE SECURITY CLEARANCE REQUIRED

• Full-time


• Organization: Computing


• Category: Information Technology/Computing


• Job Code 2: SES.4 Science & Engineering MTS 4


• Employee Referral Bonus: $1500


• Job Code 1: SES.3 Science & Engineering MTS 3


• Pre-Employment Drug Test: Required for external applicant(s) selected for this position (includes testing for use of marijuana)


• Pre-Placement Medical Exam: Not applicable


• Security Clearance: Active DOE Q clearance (or active Top Secret clearance) with Sensitive Compartmented Information access

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 an Information Systems Security Engineer to provide cyber and technical support for classified networks, standalone systems, security systems, security tools for vulnerability management, patch management, and auditing. You will manage complex security plans and component configurations, maintain cyber security tools, lead incident response, and lead large scale computer security projects. You will interact regularly with team members, customers, management, and sponsors to solve a variety of complex cyber problems in a timely manner. This position is in the Information Technology Solutions (ITS) Division supporting the Field Intelligence Element (FIE) within the Computing Directorate.

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

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

• Serve in the Information Systems Security Engineer (ISSE) role as the author and owner of comprehensive cyber security document packages.


• Plan, design, and evaluate complex cybersecurity solutions.


• Perform computer security tasks such as vulnerability remediation, audit of computer logs, and creation of documentation on policies, procedures, test plans, and risk analyses.


• Inspect information systems to verify compliance and work closely with system administrators to maintain security and accreditation status.


• Collaborate with customers in the design of their computing environment and security management processes.


• Research solutions and manage cyber-security related projects with a diverse scope over multiple environments.


• Perform other duties as assigned.

Additional job responsibilities, at the SES.4 level

• Partner with the FIE Cyber Manager to assist with collaboration and negotiation with internal and external stakeholders, including LLNL, DOE, and other agencies, to identify, prioritize, and oversee implementation of information system security solutions that meet mission requirements.


• Provide security architecture guidance and oversight to ensure information systems are designed and engineered in compliance with LLNL, DOE, and external customer requirements, and that they meet programmatic risk and authorization objectives.


• Establish priorities, allocate resources, manage schedules, and deliver complex cybersecurity projects within required cost and time constraints.




• This position requires an active Department of Energy (DOE) Q-level clearance or active Top Secret clearance issued by another U.S. government agency at the time of hire.


• Bachelor’s degree in Computer Science, Computer and Network Security, Engineering, Business, Information Systems, or related field.


• Experience with cloud computing environments and/or artificial intelligence, including large language models (LLMs), their security considerations, implementation, and practical applications.


• Advanced knowledge of cyber-related tools for auditing, compliance verification, vulnerability testing, and continuous system monitoring.


• Significant experience setting priorities and solving complex problems in a fast-paced, customer-focused team environment.


• Advanced knowledge of computer security principles, practices, and procedures with experience independently applying this expertise to analyze complex cybersecurity risks and develop technically sound solutions.


• Ability to work in a dynamic, technical team environment with competing priorities and meet deadlines that are important to project success.


• Experience approaching difficult problems with enthusiasm and creativity, and to change focus when necessary.


• Advanced verbal and written communication skills necessary to collaborate multidisciplinary teams to influence technical decisions and document, present and explain complex cybersecurity risks, findings, and recommendations.

Additional qualifications at the SES.4 level

• Expert-level experience providing strategic technical leadership to resolve highly complex, ambiguous cybersecurity challenges with significant organizational or programmatic impact; integrating conflicting technical, operational, and stakeholder requirements to establish innovative, risk-informed solutions, technical direction, and long‑term security approaches.


• Expert verbal and written communication skills, with experience providing strategic technical advice to senior management, sponsors, and multidisciplinary teams; influencing consequential cybersecurity decisions.


• Subject matter expertise in interpreting and implementing DOE, DoD, and Intelligence Community security policies and requirements in classified environments to support system authorization and ongoing security compliance.

Qualifications We Desire

• Professional IT/Cyber certification (e.g., CISSP, CISM, SANS Certification).

Pay Range

$175.530 - $267,030 Annually

$175,530 - $222,564 Annually for the SES.3 level

$210,630 - $267,030 Annually for the SES.4 level

This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. An employee’s position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs.

#LI-Onsite

Position Information

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

Why Lawrence Livermore National Laboratory?

• Included in 2026Best Places to Work by Glassdoor!


• Flexible schedules (*depending on project needs)

This position requires an active Department of Energy (DOE) Q-level clearance or active Top Secret clearance issued by another U.S. government agency at time of hire. Also, you must have the ability to obtain and maintain Sensitive Compartmented Information (SCI) access. Please note that your current active Q or Top Secret clearance with DOE or another agency does not guarantee DOE SCI access approval; if you are denied access, you may be subject to reinvestigation of your existing Q or Top Secret Clearance.

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 useand/or possession ofmobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area whereyou are not permitted to have a personal and/or laboratory mobile devicein your possession. This includes, but not limited to cell phones, tablets, fitness devices, wireless headphones, and other Bluetooth/wireless enabled devices.

Ifyou useamedical device, whichpairs with a mobile device,you must still follow the rules concerningthe mobile device in individual sections within Limited Areas. Sensitive Compartmented Information Facilities requireseparate 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.

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.

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