4.6 Google Rating
About Us
Proudly Serving Tulsa Homes for Generations
Mullin Plumbing has been a trusted name in Tulsa for decades, built on a foundation of honesty, quality, and dependable residential service. From the beginning, our mission has been simple: take care of people the way we’d want to be treated. We’ve grown through hard work, word of mouth, and a true commitment to our community. Whether we’re fixing a leak or installing a new HVAC system, our goal is to make life easier for local homeowners. When you call Mullin, you’re calling a neighbor who cares.Over 50 Years of Experience
We’re Here To Help 24/7

Our Story
Mullin Plumbing, Inc. has proudly served the plumbing needs of Oklahoma residents since 1973. Founded by Jim Mullin as a local drain and septic service provider, the company built its reputation on honest work and dependable service. In the early 1990s, Jim’s son Markwayne Mullin stepped in to lead the company and transformed it into a full-service plumbing business offering installation, repairs, and maintenance. Under Markwayne’s leadership, Mullin Plumbing expanded rapidly, reaching more homeowners and building a loyal customer base. When he left the business in 2011 to pursue a career in politics, he passed the torch to trusted long-time managers Rob Morris and Ray Trimble.Rob, now CEO, and Ray, now COO, brought decades of internal experience and a shared commitment to continuing Mullin’s legacy. Together, they added a heating and air conditioning division, modernized operations, and ensured the company stayed rooted in the communities it serves. Their leadership has kept Mullin grounded in its core mission: being reliable, local professionals who care deeply about the people they serve. Today, with 105 signature red vans on the road, Mullin Plumbing continues to serve homes across Tulsa and Oklahoma City. As we celebrate 50 years, our promise remains the same—honest service, done right.


105
red service vans are ready to help keep your home comfortable.Meet Our Leadership Team

Ray Trimble, Chief Operating Officer
Ray Trimble is the Chief Operating Officer at Mullin Inc, bringing over 20 years of dedicated service to the company. Residing in Broken Arrow, Oklahoma, he is happily married to Missy Trimble, celebrating 29 years together. Their family includes two sons, Triston and Tyler, as well as a daughter-in-law, Sanora. Ray is a seasoned radio host, having led the “House Talk” shows for 18 years on both 1170 AM The Blitz and KRMG 102.3 FM.
His guiding philosophy is encapsulated in his favorite quote: “If serving is beneath you, then leading is beyond you.” Ray’s passion for people and commitment to his work are the hallmarks of his professional journey.

Robert Morris, Chief Executive Officer
Robert Morris serves as the Chief Executive Officer of Mullin Inc. He has been a resident of Tulsa, OK since 1984. Happily married with three grown children and five grandchildren, enjoying the family life. His career in plumbing industry began at Mullin Plumbing in 1988, where he started as an apprentice. Demonstrating commitment and skill, he obtained his journeyman and contractor’s licenses in 1995.
His exemplary leadership and extensive industry knowledge led to his appointment as CEO of Mullin Plumbing in 2011, marking a significant milestone in his professional journey.
Hear from a technician
Lupe has been a Mullin Employee for over 25 years
Careers at Mullin Plumbing
People are the heart of Mullin Plumbing, Inc., which is why we invest in hands-on training, monthly safety and skills classes, and a dedicated support team. Our employees enjoy competitive benefits—including health, dental, and prescription coverage—plus generous PTO and a 401K with company match. Ready to grow your career with a company that invests in you? Join Mullin Plumbing.Comprehensive Training
Excellent Benefits
Safety First



