Our Team

ACT employs the best and the brightest in the industry.  Our service group is trained extensively on all required programs, as well as additional programs ACT has put into place internally. ACT provides all personnel, equipment, materials and other resources required to service your environmental needs.  Our senior management team has over 200 years of industry experience.

ACT Team
Walter H. Singer, President

Walter H. Singer, President

CEO, President and Founder of ACT, Walt has led the company to become a market leading environmental presence in California. ACT has experienced consistent financial growth while having an exemplary…

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Harold DeGuzman, CFO

Harold DeGuzman, CFO

Harold joined ACT in May 2013 as the Chief Financial Officer (CFO). In this role, he has oversight for finance, accounting and human resources. He also plays a key role…

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Pasquale M. Paduano, Vice President Of Operations

Pasquale M. Paduano, Vice President of Operations

Pasquale has over 25 years of successful operations management and sales leadership experience in the environmental management services industry. He is responsible for driving revenue growth and profitability for all…

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Krista Wood Harsono, Director Of Compliance

Krista Wood Harsono, Director of Compliance

As ACT’s Corporate Compliance Director, Krista brings more than 12 years of experience in the environmental industry. Under Krista’s guidance ACT has received several commendations and awards for its stellar…

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Vince Cavaliere, Director Of Sales Southern California & Southwest

Vince Cavaliere, Director of Sales Southern California & Southwest

Vincent M. Cavaliere (Vince) joined ACT on August 15, 2011 and has over 22 years of environmental sales and marketing experience. Over the years, he has successfully managed annual sales…

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Russ Cowperthwaite, Transportation Manager

Russ Cowperthwaite, Transportation Manager

Russ’ career in the transportation industry began over 30 years ago as a heavy duty diesel truck technician and he developed into a top notch ASE Certified Master Heavy Duty…

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Adam Brandin, Director Of Sales Northern California

Adam Brandin, Director of Sales Northern California

Adam has been with ACT for 12 years and has been instrumental in the continued growth of the firm including ACT’s expanded lines of services. Adam has over 24 years…

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Shawn Moudy, General Manager – New Mexico

Shawn Moudy, General Manager – New Mexico

Shawn joined ACT in May 2008 and has held multiple positions during his time here, currently Shawn is the General Manager of ACT’s New Mexico office, handling our TSDF and…

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Brian Trefault, Branch Manager – Merced

Brian Trefault, Branch Manager – Merced

With over 22 years of sales and management experience, Brian is the General Manager at ACT’s Merced, California facility. Brian was hand-picked for this position by the CEO because of…

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Larry Moore, Vice President Of Federal Operations

Larry Moore, Vice President of Federal Operations

Larry has over 30 years of senior management experience in the environmental industry, with extensive background in the Federal arena. He has managed work for all branches of the military,…

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Daniel Busbee, Regional General Manager

Daniel Busbee, Regional General Manager

Dan Busbee has over twenty one years of experience in the hazardous waste management industry, including; transportation scheduling, personnel training, emergency response, site remediation, laboratory packs, and drum and bulk…

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Chris Dean, Contractor Manager

Chris Dean, Contractor Manager

Chris’ promotion to Onsite Contract Manager is well deserved based on his tenure since 2006 as Characterization Chemist. He joined ACT in February 2012 at Sandia. Prior to 2006, he…

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John Smrdeli, General Manager Of Sunnyvale

John Smrdeli, General Manager of Sunnyvale

John has 25 years of operations and sales experience in all aspects of the hazardous waste management industry, and has worked with several different Hazardous Waste firms. After obtaining his…

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Tobi Moore, GM For Denver

Tobi Moore, GM for Denver

Tobi joined ACT in December 2014 and is currently the General Manager of ACT’s Colorado office, handling our 10-day Transfer Station. During her 19 years in the field of Environmental…

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Mark Owens, President Of Federal Services Division

Mark Owens, President of Federal Services Division

Mark has more than 30 years of experience in leading successful organizations in the Environmental Industry. He is a licensed general engineering, remediation and general contractor with multiple professional certifications.…

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Rick Marshall, Director Of Sales Northern California And Northwest

Rick Marshall, Director of Sales Northern California and Northwest

Rick Marshall brings over 20 years of sales management experience to ACT, having held multiple leadership positions in the global semiconductor industry. During his career, Rick has developed hundreds of…

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Ramon Robles, Branch Manager – Los Angeles

Ramon Robles, Branch Manager – Los Angeles

Jesus “Ramon” Robles-Copas has over 20 years of experience as an environmental professional working on projects throughout California and the Southwest U.S. Ramon has managed TSDFs and several 10-day locations,…

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Ray Ortega, Branch Manager – Albuquerque

Ray Ortega, Branch Manager – Albuquerque

With over 10 years of sales and management experience, Ray joined ACT in June 2014 as an Account Manager and has moved up to Branch Manager of ACT’s Albuquerque Facility.…

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Jeff Ruhl, Branch Manager – San Diego

Jeff Ruhl, Branch Manager – San Diego

Jeff Ruhl started his career in the environmental industry with ACT over 13 years ago. Jeff was hired as a technician but quickly moved through the ranks, working as a…

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Keith Munnerlyn, Branch Manager – Portland, OR

Keith Munnerlyn, Branch Manager – Portland, OR

Keith Munnerlyn has 30 years’ experience in the environmental field. He has vast knowledge of tankers, roll-offs, project management, heavy equipment operations, emergency response and tank cleaning. Keith has also…

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Frank Sanchez, Branch Manager – Phoenix

Frank Sanchez, Branch Manager – Phoenix

Frank is responsible for business development and operations in Arizona. He has over 30 years’ experience in the environmental services and hazardous waste management industry, dating back to 1984, when…

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