About Us

Multi-process Integration With Integrity

Weldmac specializes in complex, large-format assemblies that combine forming, machining, welding, and laser processing into fully integrated structures.

Our leadership culture emphasizes continuous advancement — adopting new technologies, expanding forming capability up to 800 tons, and pursuing projects that demand tighter tolerances and greater structural complexity. The result is hardware designed for vibration, thermal stress, and extreme load environments.

History & Experience

Founded in 1968 and acquired by PennAero Aerospace in April 2023, Weldmac has built a reputation as a premier supplier of large-scale, precision-formed and welded assemblies.

For more than 50 years, Weldmac has pursued increasingly demanding fabrication challenges — seeking closer tolerances, more complex geometries, and higher structural performance standards. Today, Weldmac serves aerospace, defense, power-generation, and space launch customers from its multi-building campus in El Cajon, California.

Certified to AS9100D, Weldmac’s quality system spans planning, procurement, fabrication, inspection, and first article validation.

The quality department is engaged throughout the entire production lifecycle — ensuring traceability, conformance, and readiness for flight-critical applications.

Unrivaled Quality

PRI AS9100 D / ISO 9001:2015
NADCAP for Welding
NADCAP Nonconventional Machining
Dozens of Weld certifications kept and maintained for individual customer requirements.

Weldmac also obtains additional certifications as jobs require.

Our Process Capabilities

Weldmac’s strength lies in multi-process integration—combining in-house machining, forming, welding, and laser cutting—to produce turnkey, high-precision assemblies with repeatable quality and reduced lead times.

Our AS9100-certified processes support exotic alloys and complex geometries for mission- critical applications.

Forming

Deep drawing
Hydro/bladder press
Roll forming
Expanding
CNC spin forming
Press brake (200–800 ton hydraulic presses)

Machining & Laser

CNC mills/lathes/boring mills
Wire EDM
CO2/fiber laser cutting (holes to .020″ dia., ±.001″ tolerances)

Welding

Complex MIG/TIG/seam
Manual/semi-automatic welders Circumferential/flat welders
X-ray qualified

Engineering & Tooling

In-house tooling/fixture design
Solid modeling for process optimization
CAD/CAE simulation

Treatments & Inspection

Heat treating
Anodization
Chemical film
Passivation
NDT/qualification testing

Assembly

Multi-process integration for reduced part count
Scalable from prototypes to high-volume

Key Customers

Weldmac partners with major aerospace primes, defense contractors, and space launch providers, delivering rugged, precision components for airframes, propulsion, and launch systems.