CERTIFIED FASTENERS & INDUSTRIAL SUPPLY - Key Persons


Bill Lang - President

Job Titles:
  • PRESIDENT
Following his father's footsteps, Bill Lang Jr. has been part of the Certified family for over 30 years. As President and CEO of the company, he has built upon the foundation left by Bill Lang Sr. to improve and expand the company to new heights. Regardless of how big Certified becomes, however, Bill wishes to maintain the same family-like dynamic that has led the company to prosper since its early beginnings.

Bob O'Brien

Job Titles:
  • SALES EXECUTIVE
As one of our leading fastener experts, Bob has been with CFIS for over 15 years and in the fastener industry for over 40 years. In the past, Bob has been a certified internal ISO auditor, and takes an active role in the quality process at CFIS. He was also a board member of the Midwest Fastener Association where he has served both as the President and the Treasurer.

Lonnie Barna

Job Titles:
  • SALES ENGINEER
Lonnie has been in the fastener industry since the invention of the wheel, first as an expeditor and then a buyer. He then went on to sales and sales management. Having great interest in the products propelled him into problem solving and application engineering, which he then applied to Certified and has been an invaluable member ever since.

Monica Wiatr

Job Titles:
  • PURCHASING AGENT
Having worked in many different administrative positions over the years, Monica brings a wealth of knowledge and experience to her latest role as Purchasing Agent for CFIS. Monica has always been a smart shopper in her personal life and she now uses those skills to hunt for great deals at work too! Monica is also Sam Lang's mother, which helps solidify our proud status as a family-owned and operated company.

Patricia Johnson

Job Titles:
  • AP / AR MANAGER
Patricia has been with us for over 25 years and has played a fundamental role in Certified's success. Patricia handles many of the office responsibilities - such as our accounting and finances - that keep Certified running. Just pay those bills on time so she won't come running after you next!

Sam Lang - VP

Job Titles:
  • VICE PRESIDENT
Graduated from Loyola University Chicago with a bachelor's degree in Business Administration and Operations Management, Sam is putting to use what he learned to help Certified grow and improve. Though he has been working for the company since he was a child, he still has much to learn about the fastener industry and looks forward to working with the rest of the Certified team along the way.