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About the Instructor


Mark Ostertag

Instructor & Licensed Irrigator


Mark is a very knowledgeable instructor with over 32 years of experience in the irrigation industry. He has been teaching irrigation classes since 1990. When he's not teaching, Mark enjoys spending time with his wife of over 30 years, Rhoda, and his five sons. Keeping it all in the family, three of Mark's sons are also licensed irrigators. Mark also enjoys hunting and fishing whenever he can. 

- TCEQ instructor provider #528

- Texas Licensed Irrigator #4790

- Backflow Prevention Assembly Tester (BPAT) #6059

- Certified Texas A&M Irrigation Auditor

- Past President Dallas Irrigation Association (DIA)

- Past Trustee of Texas Turf Irrigation Association (TTIA)

I’m happy to answer your questions!

Thanks for your question!

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