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Our Team

Management Team

Mark O'Connell

Mark O'Connell
Mark O'Connell is a graduate of The University of Kentucky with a bachelor’s degree in Business Marketing with a minor degree in Business Economics. Mark has 18 years experience in the plumbing industry. This is comprised of 5 years experience at the plumbing wholesale distribution level and 13 years experience as an independent manufacturer representative. Mark is also is a graduate of CPMR professional college for Certified Professional Manufacturers Representatives.

Randy Etter

Randy Etter
Randy Etter attended Earlham College and is a graduate of the Ohio State Plumbing School with a State of Ohio Journeyman Plumbing License. Randy has 30 years experience in the Plumbing industry. This is comprised of 11 years experience as a plumbing contractor, 2 years experience at the plumbing wholesale distribution level, and 17 years experience as an independent manufacturer representative.

Ray Lisowski


Ray Lisowski
Ray Lisowski joins our team with over 35 years of plumbing industry experience which consists of 4 years at the plumbing wholesale distribution level and 2 years as an estimator and job superintendent with a mechanical contractor. Ray also has 28 years experience as an independent manufacturer’s representative with the past 14 years managing his own multi person agency. Ray brings to us a wide range of experience for promoting sales of both specification and shelf products.
Cornerstone Marketing, LLC | 10891 Heeter Road | Brookville, OH 45309 | P 937-248-1750 | F 888-704-2242
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