Paul J. Grunau establishes Grunau Company for plumbing and repair services
Grunau Company adds heating system installation to offered services
Grunau Company adds fire protection systems to its capabilities
Paul E. Grunau joins Grunau Company to help manage the business
Grunau Company adds sheet metal services
Gary Grunau joins Grunau Company as 3rd generation of family leadership
Grunau Company expands fire protection services to Indianapolis, IN
Grunau Company adds structural and specialty metals to its capabilities
Grunau Company expands fire protection services to Pittsburgh, PA
Grunau Company expands fire protection services to Orlando, FL
Paul W. Grunau joins Grunau Company marking the 4th generation of family leadership
Grunau Company expands fire protection services to Youngstown, OH
Grunau Company brands its specialty metals division as Grunau Metals
Grunau embraces the Lean Construction culture
Grunau is first Wisconsin mechanical contractor to have LEED Accredited Professionals on staff
Grunau Company is acquired by APi Group, a family of specialty contractors
Lawrence E. Loomis becomes President of Grunau Company
Bill F. Ball named President to lead Grunau Company into the future as Grunau marks its 95th year of being in business
Grunau celebrates 100 years of serving our customers as the benchmark of excellence
Sal B. Angelo takes on the presidential responsibilities at Grunau Company
Grunau Metals moves to our APi sister company, LeJeune Steel
Grunau Fire Protection joins our APi sister company, Davis Ulmer Fire Protection family of companies
