Board Members


Dennis Wallace -President


I started in the pest control industry some 39 years ago.  I was hired right out of college to run a branch office owned by the Little Rock franchise of Terminix.  For the last 7 years I have been the Oklahoma Regional Manager for West Termite, Pest and Lawncare and have recently been promoted to Technical Service Director company wide.  My wife and I will soon celebrate our 41st anniversary, and are blessed with 2 children and 4 grandsons.  I am proud to be able to provide for my family by serving others in the pest control business.


Joel Derington - Vice President Eastern Chapter

Joel Derington is a Board Certified Entomologist and Owner of Pest Medic. Joel also owns a Marketing company in the Medical and Public Health field. Joel spent his early career as a pest control employee, business owner,  technical services entomologist, and technical sales representative for such companies as ABC Pest Control, Waste Management, Terminix, and Ciba/ Novartis Animal Health.The recent years have been spent in sales in the medical field. He is enjoying being back in the pest management realm as a Pest management company owner, and consulting technical adviser and Dealer Relationship Manager for Remington Solar's Mosquito and insect misting systems. Joel lives in Tulsa, OK.


Robert Freeman - Vice President Western Chapter


 Bio coming soon


Denver Talley - Industry Affairs


Denver Talley

I began working for Irwin Pest Control in Sulphur, Oklahoma in May of 1952. I worked through High School, College, and after completing college until 1970 at which time I became licensed and started Environmental Chemists Inc. In 1994 I purchased One Stop Pest Control of Norman. I'm married with three children, five grandsons, and four granddaughters. All my children and all my grandchildren have or do presently work in the business. I am also licensed as a Home Inspector. My license number is 1. I have a doctorate in Public Health and also do air, soil, and water testing.


Brad Lee - Public Affairs


I have worked for Arrow Exterminators for 12 years, 6 of those as the pest control manager. I started doing pest control when I was 21 years old. I order pest control supplies, oversee routes, make sales contacts and anything needed to make sure our business is successful. I'm a certified applicator in multiple categories.   I am married to my wife Samantha and have two children Gracie 11 and Gage 8. I am the Vice President of Tulsa Networking Exchange.



Eileen Imwalle - Secretary/Treasurer


I have been in the pest control industry since 1982. 1982-1987 sales and service coordinator for Parker Pest Control, Inc. 1987-1994 inside and outside sales for Univar USA (Van Waters & Rogers). 1994-2009 worked with my husband in our business, Old Time Pest Control, Inc. 2009-2012 office manager for West Termite & Pest 2012-2015 office manager for Oklahoma Pest Solutions. 2012 to current OPCA Secretary. 2011-2012 Tulsa Metro Chamber representative.1998-2017 Volunteered through my church with Family and Children's Services of Tulsa providing weekly food deliveries along with holiday meals and adopting families for the Christmas season

I have been married for 33 years and have 2 wonderful daughters, one who owns a coffee shop and bakery and one who is a proud member of the Air National Guard.