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High Explosive Machinist/Sr. Machinist

Associate | Full-time
Engineering | tracy, CA | 08/10/2023

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Company Description

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 committed to a diverse and equitable workforce with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, experiences, and perspectives. This is important for continued success of the Laboratory’s mission.

Pay Range

$39.05 - $48.50 Hourly for the 981.2 level 
$46.90 - $58.24 Hourly for the 981.3 level

Please note that the pay range information is a general guideline only. Many factors are taken into consideration when setting starting pay including education, experience, the external labor market, and internal equity.

Job Description

We have multiple openings for High Explosive Machinists/Sr. Machinists. You will provide manufacturing support to fabricate difficult-to-machine parts, high explosive parts, components, and assemblies to customer requirements, including maintenance, safety and security responsibilities. You will work with other High Explosive (HE) Machinists and project leaders to determine priorities, schedules and process requirements.  Work hours will be consistent with site location: four, 10-hour days per week.  These positions are in the Manufacturing Engineering Section (MES) of the Materials Engineering Division (MED), within the Engineering Directorate.

These positions 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

  • Set up and operate all conventional and moderately complex precision and CNC machine tools modified for use on energetic materials to manufacture parts and assemblies. These machine tools include saws, lathes, and milling machines.
  • Handle and manage classified documents, parts, and systems.
  • Perform shop calculations utilizing intermediate knowledge of material characteristics to determine optimum feeds and speeds for energetic materials such as plastic bonded explosives.
  • Operate related shop equipment, hand tools, and measuring instruments used for machining operations (i.e., commonly used conventional and CNC machine tools, specialty micrometers, and electronic indicators).
  • Perform shop math calculations utilizing intermediate knowledge of material characteristics to achieve ultra-precision finishes, dimensions, and overall design intent.
  • Design and fabricate moderately complex fixtures and jigs to be used during a variety of manufacturing processes where conventional work holding techniques may not be used. This would include the use of specially designed vacuum fixtures or other non-traditional work holding devices.
  • Establish and plan techniques and procedures to carry out moderately complex technical assignments and set task priorities.
  • Perform other duties as assigned.

Additional job responsibilities, at the 981.3 level

  • Design and fabricate complex fixtures and jigs to be used during a variety of manufacturing processes.
  • Establish and plan techniques and procedures to carry out complex technical assignments and set task priorities.
  • Solve complex technical problems.


  • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
  • Associate degree in Machine Tool Technology or equivalent completion of an apprenticeship program in the machining trade or equivalent level of prior relevant experience.
  • Ability to perform moderately complex machining operations involving conventional and CNC machine tools, also related manufacturing and measuring equipment.
  • Intermediate knowledge of ASME Y14.5M drafting standards (read and interpret blueprints) to produce parts and assemblies.
  • Intermediate knowledge of a wide variety of materials and manufacturing processes including some difficult to machine and exotic materials.
  • Ability to identify, analyze, and provide solutions or alternate approaches to manufacturing problems using individual judgment and creativity.
  • Intermediate level knowledge of CNC programming, machining, planning, and estimating.
  • Understanding of safety awareness and safe working practices. Ability to become medically qualified to wear respiratory and protection equipment.
  • Effective verbal and written communication skills necessary to communicate tactfully and effectively in a technical environment.
  • Ability to work four 10-hour shifts per week in accordance with site location specifications.

Additional qualifications at the 981.3 level

  • Advanced knowledge of ASME Y14.5M drafting standards (read and interpret blueprints) to produce parts and assemblies.
  • Advanced knowledge of a wide variety of materials and manufacturing processes including some difficult to machine and exotic materials.
  • Advanced level knowledge of CNC programming, machining, planning, and estimating.

Qualifications We Desire

  • Familiarity with handling classified documents, classified parts, and classified removable electronic media.
  • High Explosives or hazardous materials handling/machining experience.
  • Familiarity with Mastercam and/or Creo CNC programming.

Additional Information

All your information will be kept confidential according to EEO guidelines.

Position Information

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

Why Lawrence Livermore National Laboratory?

Site 300

Site 300 is an experimental test site operated by LLNL.  Situated on 7,000 acres in rural foothills approximately six miles southwest of downtown Tracy and 15 miles southeast of Livermore, Site 300 hosts approximately 200 employees with expertise in such fields as engineering, chemistry, biology, and environmental restoration. Employees assigned to work at Site 300 may be exposed to the organism that causes San Joaquin Valley Fever (coccidioidomycosis).

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.

Pre-Placement Medical Exam

A job related pre-placement medical examination may be required.

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:

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.

We invite you to review the Equal Employment Opportunity posters which include EEO is the Law and Pay Transparency Nondiscrimination Provision.

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.

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