CornerStone One
Gary Koier is an experienced Plumbing BIM Designer currently working at CornerStone One and Cornerstone Plumbing LLC since November 2017. Prior to these roles, Gary served as a Plumbing Designer and Journeyman Plumber at J.M. Brennan, Inc. from April 2013 to November 2017. Earlier experience includes a Plumbing Apprentice position at Joe Debelak Plumbing and Heating from December 2010 to April 2013 and as a Journeyman Automatic Fire Sprinkler Fitter at Design Build Fire Protection of Wisconsin from April 2004 to December 2010. Additionally, Gary was an Automatic Fire Sprinkler Fitter Apprentice at Wenninger Co. from August 2002 to April 2004. Gary holds a Journeyman’s License in Automatic Fire Sprinkler Fitter Apprenticeship from Milwaukee Area Technical College, attended from 2002 to 2007.
CornerStone One
CornerStone One is the sole contractor in Southeastern Wisconsin offering excavation and grading, site utilities installation and commercial plumbing system design/installation from a single source. CornerStone expertise and experience covers everything from pre-planning to engineering to implementation. Our team uses advanced technology and clear communication to ensure every project is completed on time and on budget.