From Humble Beginnings

An industry leader for over 55 years, Southwest Plastics Company specializes in a custom molding of plastic and rubber parts. Over the years we have evolved and changed with the industry while maintaining the traditional family values and work ethic that make us a success. Using the latest technologies and techniques our reputation for precision molding quality service and value are well-known throughout the many industries we serve.

Dan Diaz, Quality Control Manager

Daniel Diaz has been the Quality Manager at Southwest Plastics since September 2000. He began his career in the Air Force as an Airframe Repair Specialist and was fortunate enough to have had the opportunity to cross-train over to flight crew status as a C-141 Flight Engineer. During this time, with aviation being one of his major interests, Dan also obtained his private pilot’s license at an early age. After 10 years, he left the Air Force Reserves and began his career as a Quality Assurance Inspector. While at Southwest Plastics, he was involved with the implementation of the ISO 9001 Quality System. He further went on to upgrade Southwest Plastics to the Aerospace AS9100 Quality System.

Rory Werkmeister, Production Manager

Rory Werkmeister started with Southwest Plastics in 2019. After completing his bachelor’s in Business Administration - Accounting from Cal Poly Pomona. He started his career in production management and customer service at a custom cabinet shop then moved to the transportation industry. After six years as a dispatch and driver manager of a mid-sized carrier in Southern California he made another career change back into manufacturing at Southwest Plastics. His goal is to bring new energy and insight into Southwest’s process efficiencies and further achieve superior customer satisfaction while learning the unique challenges of the plastics industry.