Management Team

Aaron Muller, President

With Paul Whittier, Aaron founded Mr. Pressure Wash in 2007 because he saw that other pressure washing companies damaged the environment by generating pollutants that flowed into the groundwater. Aaron helped develop innovative, proprietary equipment that recaptures and recycles water after a pressure washing job is done. Many industrial sites are permeated with oil, gasoline, heavy metals, and other waste. MPW’s mandate is to get these out safely. Aaron sees green business as a calling. An entrepreneur since high school, he zealously merges the practical and idealistic at MPW.

Paul Whittier, Vice-President

Paul co-founded MPW with Aaron Muller in 2007 with the aim of running a full-service pressure washing company that could guarantee its clients that by using it, they would be in compliance with all applicable environmental regulations. Already a successful entrepreneur, Paul helped fill a hole in the Pacific Northwest’s market with the start of MPW. Proud of the company’s eco-friendly record, Paul helps generate new business and ensures that all aspects of MPW remain on the cutting edge of green cleaning technology.

Mayumi Muller, Vice President of Business Development

Mayumi seeks out potential customers for MPW and educates them about the unique methods and results on offer. She focuses on business owners who are concerned about the environment and introduces them to MPW’s eco-friendly techniques and equipment. Formerly an business development rep. with Sherwin-Williams, a Fortune 500 company, Mayumi joined MPW because she believes in its community-focused, green mission. She enjoys meeting new customers and sharing with them the mechanics and benefits of our proprietary water recapture system. Mayumi believes that small, conscientious businesses can make a big impact in the community and is proud to be part of MPW.

Gary Oswold, Operations Manager (Truck Washing Div)

Gary started work with MPW more than five years ago – he left an 18-year position to join the team because he believes in the company’s eco-friendly mission. “I call it next generation washing,” he said of the recapture and recycle systems. “I think what we do is pretty cool.” Gary ensures that operations run smoothly and that each job strictly complies with best practices. He deals with customer service, schedules jobs, and oversees operations both at the office and at job sites. A Seattle native, Gary has been involved with the truck washing industry since he helped his father in high school.

Liz Soltero, Office Manager

As the office manager, Liz is responsible for making sure every cleaning job MPW takes on runs smoothly, from the first telephone conversation with a client to billing after work is completed. She started work at MPW this year and cites the camaraderie the office shares as a primary reason she likes coming to work every day. Liz earned both a B.A. and M.A. in accounting and does payroll and billing for MPW. She also communicates with a wide variety of customers and assists with scheduling and coordination when needed.

Darin Sell, Wastewater Compliance

Darin maintains the MPW equipment and the shop where it it stored. He coordinates repairs on various items to that no job is ever short necessary tools. To that end, he also keeps track of parts and orders them in a timely fashion. Darin said his favorite part of the job was troubleshooting repairs – he likes to keep his mind working at a high level. Educated at Highline Community College and South Seattle Community College, Darin has worked for MPW for the past four years.