FORT WORTH, Texas (July 16, 2019) – FIRST ONSITE continued its steady growth in the North American market with the acquisition of ASR Property Restoration, the largest restoration company in California’s Ventura County.

FIRST ONSITE has completed the transaction to add all of ASR’s assets and its three divisions (restoration, special services and construction). Terms of the FIRST ONSITE-ASR transaction, including purchase price, were not disclosed.

“We are pleased to welcome the excellent managers and staff of ASR into the FIRST ONSITE family, and we look forward to the additional strengths that this new combination will give us in Southern California,” said FIRST ONSITE CEO Stacy Mazur.

ASR has about 80 employees, and the staff will begin working immediately in conjunction with the Anaheim office that FIRST ONSITE had already established.

“We are eager to combine forces with FIRST ONSITE as we help businesses in Southern California recover from wildfires, floods, mudslides and other disasters,” said Kirk Prouse, founder and CEO of ASR.

Prouse will continue to provide his skills in the Southern California market, serving as regional director of Southern California. ASR was heavily involved in the recovery from the recent Woolsey and Hill wildfires, and those efforts are ongoing.


Founded in 1998 and based in Fort Worth, Texas, FIRST ONSITE LLC is one of the largest emergency restoration and reconstruction service providers for commercial enterprises in North America. FIRST ONSITE is a wholly owned subsidiary of FirstService Corp. In 2016, FIRST ONSITE acquired FirstOnSite Restoration, the leading independent Canadian disaster restoration services provider. With approximately 1,500 employees,  FirstOnSite assists property owners and businesses in recovering from fire, flood, natural and human-caused disasters. For more information on FIRST ONSITE, visit, call (800) 622-6433 or on Twitter, @InterstateRest.

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