About J & M Manufacturing, Inc.

J & M Manufacturing is a precision sheet metal fabricator, located in Cotati, California near Petaluma. We serve customers throughout Silicon Valley and Northern California, from the Medical, Industrial, Electronics and Consumer Products industries.

Utilizing the latest CAD and solid modeling software and CNC Laser cutting and Turret punch tooling enables us to be a full-service shop, able to meet critical turnarounds on small run and prototypes -or- to run large production jobs for our customers.

We offer MIG, TIG and spot welding, a complete paint shop and silkscreening, assembly and full contract manufacturing services, including vendor inventory management to help customers "lean" production, reduce cycle-times and preserve capital.

Executive Team


Jim Judd
Co-Owner
Paul Matthias
Co-Owner