Leadership Team

Jeff Nieman — President
Jeff founded Evergreen Air Conditioning in 2003 to address a gap in the HVAC market.

Jeff Nieman

  • 25+ years of multisite HVAC experience
  • Commercial Territory Manager at York:
    • Responsible for sales territory calling on HVAC commercial contractors in the greater Chicago area
  • National Account Manager at York
    • Responsible for customers such as McDonalds and Kohl’s Department Stores



Brock Studinski — VP Energy & Technical Services
Brock joined Evergreen Air Conditioning in 2014, bringing over a decade’s worth of multisite HVAC experience with Kohl’s and Trane. Brock earned LEED accreditation in 2009.
Brock Studinski

  • 11+ years of multisite HVAC experience
  • Senior MEP Engineering Manager at Kohl’s:
    • Responsible for the management of the design and enhancement of Kohl’s Mechanical, Electrical, Plumbing, Fire Protection, and Building Automation
    • Performed detailed analysis of different HVAC equipment types and manufacturers in order to determine optimal selection for each store considering cost of energy and climate zone
  • Repairs & Maintenance Manager at Kohl’s:
    • Implemented call center program for all Energy Management calls, saving an estimated $9.6M in utility spend
  • Served as Project Manager at Trane:
    • Oversaw multiple simultaneous projects, including building automation, turnkey replacement, and chiller plant projects