Aaron Muller, Founder & CEO, Mr. Pressure Wash
Aaron Muller is the Founder and CEO of Mr. Pressure Wash, bringing more than three decades of hands-on experience in the pressure washing and commercial cleaning industry. He began his career in the late 1980s working in the field, learning firsthand what it takes to clean efficiently, safely, and profitably—long before environmental compliance and water regulations became a major focus.
Aaron is widely recognized for his deep systems knowledge. He understands that professional pressure washing isn’t just about high pressure—it’s about the right equipment, proper chemistry, water control, and repeatable processes. Under his leadership, Mr. Pressure Wash was built around proven systems that deliver consistent results while protecting surfaces, equipment, and the environment.
A strong advocate for eco-friendly pressure washing, Aaron has implemented water-efficient cleaning methods, biodegradable detergents, and advanced water recovery and filtration systems to minimize runoff and environmental impact. His approach prioritizes compliance with local, state, and federal regulations while still delivering powerful, visible cleaning results for commercial and industrial clients.
Today, Aaron continues to lead Mr. Pressure Wash with a hands-on, old-school work ethic supported by modern technology and environmentally responsible practices. His focus remains the same: provide reliable, high-quality pressure washing services, operate responsibly, and build long-term relationships with customers who value professionalism and accountability.
Mayumi Muller, Vice PresidentMayumi is the CEO and President of Mr. Pressure Wash, the leading commercial pressure washing company in Washington State that specializes in eco-friendly cleaning methods. Mayumi brings over 20 years of business development, marketing, and management experience to lead Mr. Pressure Wash, an award-winning company that pressure washes millions of square feet of parking garages, sidewalks, and commercial properties every year. Born to a Japanese mother and African-American father, Mayumi’s goal is to run a diverse business of many cultures. She works hard everyday to run a company with 50+ employees and educate potential customers on the importance of hiring an eco-friendly pressure washing company so that grease, oil, and heavy metals do not run down the storm drains and enter Puget Sound. Fun fact: Mayumi is a former Mrs. Washington and still models to this day.
Matt Eartherahm plays a key role in field operations at Mr. Pressure Wash, bringing hands-on experience and a detail-driven approach to commercial and residential pressure washing. He works directly with crews, equipment, and job sites to ensure every project is completed safely, efficiently, and to company standards.
Matt is responsible for overseeing daily operations in the field, coordinating schedules, and maintaining quality control across jobs of all sizes. His focus is on proper surface preparation, correct pressure and chemical use, and consistent results—making sure every property is cleaned thoroughly without damage or shortcuts.
With a strong understanding of pressure washing equipment, detergents, and cleaning methods, Matt helps maintain high service standards while keeping crews productive and accountable. He is known for his reliability, problem-solving mindset, and commitment to getting the job done right the first time.
Matt takes pride in delivering dependable pressure washing services and supporting a team culture built on professionalism, safety, and results.
Gary Oswold, Operations Manager (Truck Washing Division)Gary joined us at MPW in 2008. 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.
Jackson Muller, Operations & Pressure Washing Services
Jackson Muller represents the next generation of leadership at Mr. Pressure Wash, with hands-on experience in commercial and industrial pressure washing operations and day-to-day field execution. Having grown up around the pressure washing business, Jackson learned early that this industry is built on consistency, efficiency, and doing the job right the first time.
Jackson works directly with crews, equipment, and customers to ensure properties are cleaned safely, thoroughly, and on schedule. His focus is on execution—making sure proper procedures are followed, quality standards are met, and customers receive dependable results without excuses or shortcuts.
With a strong understanding of professional pressure washing equipment, detergents, and workflow optimization, Jackson helps bridge old-school work ethic with modern, efficient cleaning systems. He plays a key role in maintaining service quality while supporting growth as Mr. Pressure Wash continues to expand.
Jackson takes pride in delivering reliable, high-quality pressure washing—because in this business, results matter more than talk.
