About Us

Mark Powley, President, grew up in a family owned sand & gravel operation.  After returning from mechanics school, Mark went to work at his family’s gravel operation.  He started in maintenance and worked himself up to Superintendent of the gravel operation.  He started selling sand & gravel equipment in 1998 and came to work at Loos Service & Supply, Inc. in 2001.  Mark has over 37 years of working knowledge in the aggregate industry.

Ron Witt, Outside Sales, came to work for Loos Service in the spring of 2006.  He previously worked at a gravel operation where he was involved in crushing, screening, dredging and equipment maintenance. Ron has over 36 years of experience in the gravel industry.

Craig Wood, Outside Sales, I was the first salesperson for Horton Supply’s branch in Fenton, MO in the late 90’s selling to sand and gravel plants, quarries, and miscellaneous industrial accounts like Ready Mix and asphalt producers. In 2000 I went to work for power techniques selling equipment and labor mainly to coal yards in Power Plants while maintaining customers from my previous position at Horton. In 2016 I went to work for RB Scott selling Superior parts and equipment throughout Illinois to sand and gravel producers, quarries, and other industrial customers before coming to work with Loos Service & Supply in August of 2020.

Jared Powley, Shop Manager, came aboard in 2015. He has a welding degree along with several years of experience in welding and fabricating.

Joel Powley, Fabricator, has been part time with us since 2016. He joined the team full time in February of 2020. He was in home construction for 2 years and fabricating for about a year.

Don Kohler, Mechanic (alias-The Professor), just joined the team this year and is putting his expertise to great use.

Tony Parsons, Fabricator, has several years of experience with fabricating, welding, and painting. Tony joined our team in June.

Dani Fitch, Office Assistant, joined our team in August 2021. She is bringing a lot of great skills and knowledge to the office and is great with our customers-you may have already spoke with her on the phone.

Nicki Powley, Secretary/Treasurer and Inside Sales, rejoined the company in January of 2018 after previously working here for 5 years.


We have over 100 years of experience in the sand and gravel industry to offer our customers.  We look forward to working with each of you.