APS-4: Gunsmith II

Location Seoul Category Logistics & Government Services Job Type Full time Job Id R3000796 Posted Date 10/21/2026

Title:

APS-4: Gunsmith II

At KBR, we deliver science, technology and engineering solutions to governments and companies around the world. KBR employs approximately 37,000 people worldwide with customers in more than 85 countries and operations in over 28 countries. KBR is proud to work with its customers across the globe to provide technology, value-added services, and long-term operations and maintenance services to ensure consistent delivery with predictable results.

Trinzic is the future independent company to be created through the planned spin-off of KBR's Mission Technology Solutions business, expected in January 2027. Our people work at the frontier of what is possible, delivering solutions in challenging environments and advancing some of the world's highest-priority national security and space missions.

Backed by decades of mission success, deep expertise, and trusted partnerships, Trinzic will launch as a global organization with more than 18,000 employees supporting customers around the world. Join us at a defining moment and help shape the future of a company built to tackle complex challenges and make a meaningful impact.

Candidates who join KBR's Mission Technology Solutions business before the spin-off will transition to Trinzic when the separation is complete and will not need to reapply for employment.

Belong, Connect, Grow, with KBR!

Program Summary

KBR Government Solutions delivers full life cycle professional and technical solutions that improve operational readiness and drive innovation. Our solutions help ensure mission success on land, air, sea, space and cyberspace for the Department of Defense, intelligence community, NASA, and other federal agencies. KBR’s areas of expertise include engineering, logistics, operations, science, program management, mission IT and cybersecurity.

This position supports the Army Prepositioned Stocks – 4 Program located in Camp Carroll, Korea. The Gunsmith II will comply with all applicable safety and environmental regulations, local safety policies, and KBR’s Zero Harm program.

Job Summary

The Gunsmith II is responsible for inspecting, repairing, rebuilding, overhauling, and performing allied trades functions in one or more of the following commodities: pistols, rifles, automatic weapons, and other arms, as well as other types of weapons systems or equipment maintained on the APS-4 program, with minimal supervision. The Gunsmith II has a thorough understanding of firearm operation principles, machine tools, and equipment, and inspects for accuracy in workmanship, including diagnosing the source of trouble and determining the extent of repairs required, proper performance of PMCS and corrective maintenance, and the serviceability of parts and the action of weapons during cycling.

Roles and Responsibilities

• Inspect, repair, rebuild, overhaul, and perform allied trades functions on pistols, rifles, automatic weapons, and other arms, as well as other weapons systems and equipment maintained on the APS-4 program, with minimal supervision.
• Apply a thorough understanding of firearm operation principles, machine tools, and equipment to diagnose the source of trouble and determine the extent of repairs required.
• Perform PMCS and corrective maintenance; inspect for accuracy in workmanship and serviceability of parts and the action of weapons during cycling.
• Consult with the Section Lead on all facets concerning the Armament Repair Section, including weapons, mounts, suppressors, and optic systems (including NVDs), prototype development, and reverse engineering projects.
• Perform modifications, Safety of Use Messages (SOUMs), Maintenance Advisory Messages (MAMs), and Engineering Changes.
• Ensure proper use of automated maintenance systems and the accurate completion of documentation related to maintenance.
• Comply with all applicable safety and environmental regulations, local safety policies, and KBR’s Zero Harm program.
• Perform other duties as assigned.

Basic Qualifications (Required Education, Experience, Skills, and Certifications)

• Must be a U.S. Citizen with a valid U.S. Passport.
• Possess a valid State Motor Vehicle Operator License.
• Ability to provide documentation to qualify as US EXPAT Invited Contractor Status and SOFA Visa IAW USFK 700-19 Regulation.
• High School/GED plus five years directly related work experience in the maintenance and repair of U.S. Army small arms inventories.
• Completion of the Unit Armorer course or equivalent.
• In lieu of formal course work, a combination of college credits, on-the-job training, other formalized training, or experience may be considered.
• Ability to work from technical manuals, work instructions and work orders.
• Ability to comply with all established methods, quality standards, and time schedules applicable to this position.
• Favorable adjudication of an NACI background check.
• Must be able to work in a non-temperature controlled environment, heat and humidity.
• Ability to lift 50 pounds to waist level and 35 pounds to shoulder height.
• Required to pass initial and periodic drug screening.

Preferred Qualifications (Preferred Education, Experience, Skills, and Certifications)

• Certificate from a vocational school or other recognized source such as a military school with a major study in Small Arms/Ordnance repair is preferred.

Belong, Connect and Grow at KBR

At KBR, we are passionate about our people and our Zero Harm culture. These inform all that we do and are at the heart of our commitment to, and ongoing journey toward being a People First company. That commitment is central to our team of team’s philosophy and fosters an environment where everyone can Belong, Connect and Grow. We Deliver – Together.

KBR is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law.