Celebrating 35 Years In Business

1986: Walter Mechanical Service founded by Michael A. Bunting, John W. Jensen, and Howard Shand.

1990: Michael Bunting and John W. Jensen purchase all of Howard Shand’s interest. Partnership is equally divided between Mr. Bunting and Mr. Jensen.

1993: Walter Mechanical Services receives first agreement in excess of one million dollars and procures the largest ever utility rebate ($1.2 million) for Saginaw Steering Gear Division of the General Motors Corp. now Nexteer Automotive. Number of employees: 23

1997: Walter Mechanical Service begins doing business as (DBA), Air Tech Inc.

2001: Walter Mechanical Service changes DBA name to ATIGROUP. Number of employees: 27

2007: Achieved Leadership in Energy and Environmental Design (LEED) Accreditation.

2011: Mike Bunting becomes sole owner of ATIGROUP, Inc.

2012: ATIGROUP certifies first LEED Silver and LEED Gold buildings.

ATIGROUP is certified as a Veteran Owned Small Business. Definitive hiring preference provided to our nations honorably discharged, military veterans. Business reach is stretching throughout the mid-western United States. 

2013: ATIGROUP was award the Consumers Energy Award.

2013: Michelle Landon promoted to President of ATIGROUP.

2014: Walter Mechanical Services, Inc. DBA ATIGROUP was awarded #1 Veterans Small Business Award.

ATIGROUP employs approximately 50 persons.

2014: Designed first TAVR Certified System in Mid-West.

2015: Completed Energy Savings Project at local VA Hospitals.

2015: Small Business Veteran Owned Service Disabled (SBVOSD) Certified

2018: Awarded Central Plant Project, Hines, IL

2018: Awarded GSA Federal Court & Social Security Office, Flint & Saginaw, MI.

2021: ATIGROUP was named one of the “2021 Michigan 50 Companies to Watch” by the Michigan Celebrates Small Business Program as well as the “PTAC Best Small Businesses” for Flint / Genesee County.