ABOUT WESTERMAN
Built to last. Built by owners.
Since 1909, Westerman has manufactured the equipment that keeps energy and industry moving.
From production equipment and midstream packages to hydronic systems for data centers, nuclear packaging and containment, and controlled program fabrication for federal customers — Westerman builds critical equipment for demanding markets. Employee owned since 2024 — every job has an owner’s name on it.
MARKETS WE SERVE
One Manufacturer, Six Demanding Markets
OUR HISTORY
More Than a Century of Manufacturing
Westerman has designed and built process equipment since 1909. What began as a single shop has grown into a company serving customers from the wellhead to the data center, from four manufacturing locations
across three states.
For decades, Westerman has grown through strategic expansion, new partnerships, and an unwavering commitment to the people who make the business run. That growth reached a defining moment in 2022, when two celebrated manufacturers joined forces — Westerman and J.W. Williams — bringing together fabrication equipment, field-ready modular process systems, and engineered packages under one roof. Two years later, that same spirit of shared ownership carried forward as Westerman became employee owned, placing the future of the company directly in the hands of the people who built it. Explore the milestones below that have shaped who we are today.
1909
Manufacturing begins
2014
Expanded operations with acquisition of Tulsa, Oklahoma facility
2022
Expanded operations with acquisition of J.W. Williams
2024
100% employee owned
2026
Expanded Ohio operations with new Hebron, Ohio facility
Capabilities
Engineering and Fabrication Under One Roof
Our shop handles the full scope, from ASME code vessels and atmospheric tanks to skidded systems, weld end assembly, and packaging. Weld and component validation happen in place, with full receiving equipment ready to set and connect.
- ASME code pressure vessels for gaseous and liquid fabrication
- Modular skid packaging, piping, and structural assembly
- Aqueous parts washing, FPI, and final dimensional inspection
- Procurement, subcontract, and project management
- Controls, maintenance, controls retrofits, and repairs
QUALITY
Certified Where It Counts
Quality is engineered, not inspected. Our programs are audited, our welders are qualified, and every weldment is developed to match the traceability package the customer’s program requires.
CREDENTIALS
Programs and Certifications
ASME U/UM
Pressure vessel design and fabrication to the ASME Boiler & Pressure Vessel Code, with U and UM stamps.
ASME PP/R
Pressure piping fabrication and repair to the National Board R stamp.
NQA-1
Nuclear quality assurance program for DOE, NRC, and commercial nuclear work.
CMMC Level 2
Certified to handle controlled defense information (CUI) on DOD programs.
API Standards
Fabrication to API standards for production equipment built to energy industry specifications.
Employee Owned
100% employee owned since 2024