Summary
Overview
Work History
Education
Skills
Timeline
Generic

Joseph Mossor

Discovery Bay,CA

Summary

Steamfitter, Plumber with leadership experience and exceptional people skills. Versed in all aspects of design-build, installation, repairs on plumbing, building core utility piping, HVAC, and fire suppression systems.

Desires a challenging role in a results-oriented, performance driven, positive working environment.

Overview

27
27
years of professional experience

Work History

Journeyman Steamfitter

Lawrence Livermore National Laboratory, LLNL
06.2025 - 11.2025
  • Installed and repaired piping systems in industrial settings.
  • Interpreted blueprints and technical drawings for accurate installations.
  • Collaborated with team members to troubleshoot system failures efficiently.
  • Ensured compliance with safety regulations during all operations.
  • Trained apprentices on proper installation techniques and safety protocols.
  • Collaborated with cross-functional teams for successful completion of complex projects within deadlines.
  • Implemented innovative solutions to overcome obstacles during the installation or repair process, resulting in minimal delays.
  • Reduced project completion time by accurately measuring, cutting, and threading pipes according to design requirements.
  • Coordinated with other tradespeople such as electricians or welders when required for seamless integration of piping systems in various construction projects.
  • Ensured optimal system performance by conducting thorough pressure tests on completed piping systems.
  • Minimized downtime during repairs by diagnosing and addressing issues in a timely manner.

Lead Steamfitter / Plumber

Lawrence Berkeley National Lab
07.2007 - 06.2024

Maintain systems involving hazardous chemicals, gases and liquids.
Repair and maintain fire sprinkler systems, waste, water systems and fire pumps.
Recommended various training programs, maintenance procedures, design recommendations to the facility management.

  • Installed and maintained piping systems for HVAC and plumbing applications.
  • Collaborated with engineering teams to troubleshoot and resolve mechanical issues promptly.
  • Utilized advanced tools and equipment for precision fitting and assembly of pipework.
  • Assisted in training junior steamfitters on best practices and safety protocols.
  • Developed efficient workflows to enhance productivity in high-pressure environments.
  • Implemented process improvements that reduced downtime during maintenance activities.
  • Led small teams in executing complex installation projects within specified timelines.
  • Read and interpreted blueprints and schematics to determine locations, quantities, and sizes of materials required.
  • Conducted routine inspections to ensure system integrity and compliance with safety standards.
  • Delivered cost-effective solutions for clients by accurately estimating material requirements and labor hours needed for jobs.
  • Consistently met or exceeded client expectations regarding quality standards set forth in contracts for both new construction projects and renovations involving steam systems.
  • Minimized delays in project schedules by effectively communicating progress updates with clients, vendors, and team members.
  • Optimized system performance by conducting thorough inspections and recommending necessary upgrades or repairs based on findings.

Plumber, Pipe Fitter

Critchfield Mechanical Inc
05.1999 - 01.2006
Installation and repair of design built large corporate mechanical rooms and HVAC piping systems and components,IE: Chillers, Boilers, Air Handlers, Refrigeration units, Cooling towers, water pumps etc... 

Education

Nfpa 13 Certificate - NFPA 13 Installation and Maintainence

National Fire Protection Association
San Francisco, CA, USA

Plumbing, Steam Fitting 5 Year Apprenticeship

UA local 159 Plumbers & Steamfitters
Martinez, CA, USA
06.1997

Skills

Certified Pipefitter Orbital Welder

Timeline

Journeyman Steamfitter

Lawrence Livermore National Laboratory, LLNL
06.2025 - 11.2025

Lead Steamfitter / Plumber

Lawrence Berkeley National Lab
07.2007 - 06.2024

Plumber, Pipe Fitter

Critchfield Mechanical Inc
05.1999 - 01.2006

Nfpa 13 Certificate - NFPA 13 Installation and Maintainence

National Fire Protection Association

Plumbing, Steam Fitting 5 Year Apprenticeship

UA local 159 Plumbers & Steamfitters
Joseph Mossor