A team of experienced and entreprenuerial-minded leaders keep us focused on our mission, visions and values —  so that we stay focused on delivering on the promises we make to our customers.



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Leading us to the next great Milestone

The current leadership of Milestone Environmental Services reflect the entrepreneurial spirit that bred the company 20 years ago. They bring a responsible layer of accomplished management to our established reputation for dependability and integrity. They are eager to work with our customers to find the right solution — for both the bottom line and the environment.

Gabriel J. Rio

President & Chief Executive Officer

Gabriel has over a decade of experience in oil and gas environmental services industry. He is currently the President & CEO of Milestone Environmental Services, LLC. Prior to leading Milestone, Gabriel worked as an Operating Partner with Intervale Capital, an oilfield-focused private equity fund with $1.2 billion in assets under management, and a key investor in Milestone. He was previously the Executive Vice President of Strategy and Business Development for R360 Environmental Solutions, Inc., a national provider of environmental services to the E&P industry. At R360, Gabriel orchestrated the strategy and mergers and acquisitions work which led to the formation and rapid growth of the company, and directly managed Williston Basin operations. After R360 completed a $1.3 billion sale to Waste Connections, Inc., Gabriel assumed work with the buyer to help with the integration of the R360 business into Waste Connections. Prior to R360's formation in 2010, he was an investment professional with Three Cities Research, Inc., a mid-market private equity firm, where he was principally responsible for US Liquids of LA, LP, a regional oilfield waste treatment and disposal provider in Louisiana and Texas.

Earlier in his career, Gabriel worked as an Associate Equity Research Analyst covering the global chemical industry at UBS Investment Bank, as a Petroleum Practice Fellow with McKinsey & Company a global strategy consultancy, and as an Associate at Purvin & Gertz, a Houston-based oil and gas consultancy. Gabriel holds a Bachelor’s degree in Chemical Engineering from the University of Texas at Austin.

Gabriel lives in Houston with his wife Mona, two young daughters, and great dane. He is also heavily involved in the Houston Symphony, where he sits on the Board of Trustees.

Gabriel Rio

Frank Schageman

Executive Vice President, Chief Financial Officer

Frank is responsible for the financial aspects of Milestone Environmental Services and serves on the board of directors for the company. Prior to Milestone, Frank was an operating partner at OFS Energy Fund assisting OFS and its management partners with strategic and operational guidance. Prior to OFS, Frank was Chief Financial Officer of R360 Environmental Solutions, a private equity-backed oilfield waste treatment, recycling and disposal business which was sold in October 2012. Before R360, Frank was chief financial officer for OFS Energy Services, a completion services business backed by ArcLight Capital, which was sold in 2010 to Houston-based Key Energy. Frank also spent over 16 years with Wells Fargo in various management positions including directing the bank’s Oilfield Services & Manufacturing group and commercial banking activities in the Houston region. Frank serves on the board of directors for Davis Chemical Services and Conquest Completion Services.

Frank achieved his BBA from Texas A&M University and his MBA from The University of Texas.

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Kevin Matte

Senior Vice President of Operations and HSE

Kevin has spent the majority of his career providing Risk Management services for portfolio accounts in the Oil & Gas service space.  Prior to Milestone, Kevin served as the VP of HSE at R360 Environmental Solutions where he developed a best-in-class HSE program for all companies operating under the R360 umbrella throughout the U.S.  Before that, Kevin was the VP of Operations & HSE at US Liquids in Louisiana.  There, he designed a comprehensive HSE program from the ground-up, while overseeing the company's Marine Operations Division throughout Louisiana and Texas.  Kevin has earned degrees in Fire Science and Risk Management with a minor in Environmental Science from Louisiana State University and a Master's degree in Occupational Safety & Health from Eastern Kentucky University.

He enjoys hunting, fishing, golf and spending time with his wife and two kids in Louisiana.

Kevin Matte

Jason Larchar

Vice President of Engineering

Jason is responsible for the design, renovation and construction of facilities for Milestone from concept to completion. This includes managing the regulatory and permitting for projects as well as meeting the operational functionality and safety considerations for the sites.  His prior career experience encompasses the design, estimating, scheduling and construction management of pipelines, oilfield water treatment/disposal facility projects, water treatment plants, and highway projects for Environmentally Clean Systems and Kiewit Co. 

Jason attended Utah State University, where he obtained his Bachelor’s and Master's degree in Civil and Environmental Engineering with an emphasis in Hydraulics and Fluid Mechanics. He is a licensed Professional Engineer. 

Jason and his wife, Rachel, have four young children.  He is actively involved in his church and enjoys outdoor sports activities, spending time with family, and annual visits to work on the family dairy farm in upstate New York.  

Jason Larchar