High Quality Plastic Products
Design to Distribution

ISO 9001:2015 Certified 
Call: 1-800-860-3205

About Us

Our History

Selmax Corporation was founded by Ken Mease, a native of Selinsgrove, Pennsylvania. Ken graduated from Selinsgrove Area High School and attended Susquehanna University. He honorably served his country during World War II in the Army Air Corp. After the war, Ken returned home to start a family with his wife Mildred.

In 1971, Selmax began as machine-tool facility but the business quickly expanded to include plastic injection molding products and services. Ken embraced new technologies and industry best practices to grow Selmax into what it is today.

While serving as the CEO of Selmax, Ken’s dedication to public service lead him to serve as Mayor as well as a borough councilman for Selinsgrove for several years. Needless to say, “Made in the USA” meant a lot to Ken.

Although Ken is no longer with us, we strive to continue to honor his legacy. For us, “Made in the USA” is more than just a location. It means integrity, quality, innovation, loyalty and taking great pride in the work we deliver to our customers.

Our Management Staff

Paul Koster, CEO

Paul joined Selmax in 2015 with more than 20 years of experience in project management with Raytheon Company, one of the world’s largest Aerospace and Defense companies. He spent the majority of his career working on commercial and government satellite projects, primarily with NASA. He holds a Bachelors degree in Electrical Engineering from Brigham Young University and a Masters degree in Business Administration from the University of Denver.


Craig L. Boyer, President

Craig joined Selmax in 1972 and worked closely with its founder over the years to make Selmax what it is today. With over 40 years of experience there isn't an mold making or injection molding problem that Craig hasn't seen and solved. He become President of Selmax in 2013 and is intimately involved in every aspect of the company and every customer account to ensure they receive the best products and services Selmax can offer.


Michelle Ettinger, Secretary

Michelle joined Selmax in 2006. She is the friendly voice on the phone when you call the office. She is involved in every customer account to ensure all the paperwork is done right.

Our Team

We believe in "People - Process - Product". Each day the Selmax team is committed to delivery the highest quality products to our customers. We have refined our processes over the years to ensure the team does all the right things to get the right results. They are our greatest asset.

Upcoming Trade Shows & Expos