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Corey Zarecki

Corey is responsible for the technical engineering support and operations for the Envision program. He develops and oversees construction for renewable energy projects and manages the daily operations of the Envision portfolio. Additionally, he identifies new project opportunities, fosters partnerships and drives operational improvements.

Corey has initiated and led business solutions and process improvement as an efficiency improvement leader. Prior to joining Gundersen, Corey was employed as the director of Customer Satisfaction and Six Sigma for Trane Commercial Systems. During his eight-year career with Trane, he also held positions of Six Sigma leader and certified Six Sigma-Lean master black belt driving business solutions through process improvement philosophies. He has served as a teacher and mentor to hundreds of peers around the world.

Prior to his work at Trane, Corey held a number of project engineering and leadership roles at several chemical companies.

Corey received a Bachelor of Science in Chemical Engineering from the University of Wisconsin-Madison and holds three patents.

Corey's speaking history


  • Trane Graduate Training Program, La Crosse, WI, "Energy Independence" 5/16/19
  • Medstar Washington Hospital Center, Washington, DC, "Energizing Healthcare" 7/9/19
  • Gunner High School Research Fellowship, Onalaska, WI, "Energizing Healthcare" 8/14/19


  • Island Health, Victoria, BC, Canada "Energy Independence" 2/21/18
  • Island Health, Victoria, BC, Canada "Energy Workshop" 2/21/18
  • GL Dairy Biogas, LLC, Middleton, WI "Energizing Healthcare" 6/13/18
  • GL Dairy Biogas, LLC, Middleton, WI "Digester Strategy" 6/13/18
  • GL Dairy Biogas, LLC, Middleton, WI "Energy Independence" 7/21/18
  • GL Dairy Biogas, LLC, Middleton, WI "Digester Strategy" 7/21/18
  • Aqua Innovations, Onalaska, WI "Energy Independence" 9/12/18
  • Trane Graduate Training Program, La Crosse, WI "Energy Independence" 10/5/18


  • OSF HealthCare Facilities Management & Construction Seminar, Peoria, IL "Energy Independence" 9/13/17
  • BC Hydro, Vancouver, BC, Canada "Energy Independence" 11/28/17
  • BC Hydro, Vancouver, BC, Canada "Envision" 11/28/17
  • British Columbia Institute of Technology, Vancouver, BC, Canada "Energy Independence" 11/29/17
  • Prism Engineering, Vancouver, BC, Canada "Energy Independence" 11/29/17
  • British Columbia Institute of Technology, Vancouver, BC, Canada "Envision" 11/29/17
  • Metro Vancouver, Vancouver, BC, Canada "Energy Independence" 11/29/17 


  • U.S. DOE Better Buildings Summit, Washington D.C. "Integrating Distributed Generation with Energy Efficiency" 5/10/2016
  • Gundersen Health System Emeritus Staff, La Crosse, WI "Energy Independence & Hydrogen" 7/14/16
  • CSHE Southern CA Seminar, Riverside, CA "Energy Independence" 9/15/16
  • La Crosse Chamber-Sister City of Epinal, FR, La Crosse, WI "Envision" 9/30/2016
  • Trane Graduate Training Program, La Crosse, WI "Energy Independence" 11/7/16


  • U.S. DOE Better Buildings Alliance Steering Committee, Web, "Energy Independence" 2/18/2015
  • Trane Customer for Life Conference, Dallas, TX "Envision" 3/3/2015
  • U.S. DOE Better Buildings Summit, Washington D.C. "Envision" 5/27/2015
  • U.S. DOE Better Buildings Summit, Washington D.C. "Sustainable Design" 5/28/2015
  • Vanderbilt Healthcare Design & Construction Symposium, Nashville, TN "Energy Independence" 8/6/2015
  • MHA Michigan Green Healthcare Conference, Traverse City, MI "Energy Independence" 10/9/15
  • Kaiser Permanente Annual Sustainable Resources Summit, Oakland, CA "Energy Independence" 10/12/15
  • IMAGE 2015 – SPS Amerinet Conference, Wisconsin Dells, WI "Energizing Healthcare" 11/4/15
  • Dayton Univ. Divestment/Investment Conference, Dayton, OH "Healthcare to Help Heal the Planet" 11/6/15


  • Monroe County Economic Development Conference, Sparta, WI "Energizing Healthcare" 2/27/2014
  • Trane Customer Business Event, La Crosse, WI "Envision" 3/27/2014
  • Better Buildings Conference, Winnipeg, Manitoba, Canada "Energizing Healthcare" 4/23/2014
  • Safety Training with Fire Department, Middleton, WI "Dairy Digesters" 5/19/2014
  • Yahara Lakes Association Keynote, Madison, WI "Energizing Healthcare" 6/17/2014


  • Clipper Wind Turbine Owners Group, Cedar Rapids, IA "Envision" 1/25/2013
  • EPA – Landfill Methane Outreach Program, Baltimore, MD "Project of the Year acceptance" 1/30/2013
  • EPA – Landfill Methane Outreach Program Conference, Baltimore, MD "Landfill Gas to Energy" 1/31/2013
  • Gundersen Health System Seminar, La Crosse, WI "Renewable Energy Development" 3/26-28/2013
  • GL Dairy Biogas public hearing, Middleton, WI "Envision" 5/2/2013
  • Gundersen Health System, La Crosse, WI "Energy Conservation, 9/10-12/2013
  • UW Extension - Energy on Wisconsin Group, La Crosse, WI "Envision" 9/27/2013


  • The White House - The Council on Environmental Quality (Chair Nancy Sutley) "Envision" 9/28/2012
  • House of Representative Ron Kind, La Crosse, WI "Envision" 9/28/2012
  • University of Wisconsin Energy Summit, Madison, WI "Envision" 10/30/2012
  • WI Sustainable Business Council Conference, Madison, WI "Envision" 12/7/2012


  • U.S. DOE HVAC&R/Controls Supplier Summit, Las Vegas, NV "Retro & continuous commissioning" 2/3/2011
  • Wisconsin Healthcare Engineering Association, La Crosse, WI "Energy Independence" 3/3/2011
  • Monroe County Board, Sparta, WI "Energizing Healthcare" 6/29/2011
  • Healthcare in the 21st Century Conference, Standish, ME "Sustainability Roadmap" 7/26/2011
  • Mayo Clinic Green Advisory Group, Rochester, MN "Energy Management" 11/7/2011


  • Ag Secretary Rod Nilsestuen & Public Service Commissioner Eric Callisto "Energizing Healthcare" 1/19/2010
  • U.S. DOE HVAC & Controls Supplier Summit, Orlando, FL "Hospital Energy Alliance" 1/28/2010
  • U.S. DOE Renewable Energy Supplier Summit, Austin, TX "Hospital Energy Alliance" 2/23/2010
  • U.S. DOE Renewable Energy Supplier Summit, Austin, TX "Renewable Financing" 2/23/2010
  • Practice Greenhealth's CleanMed Conference, Baltimore, MD "Hospital Energy Management" 5/12/2010
  • GL Wind Zoning & Planning Commission public hearing, Winona, MN "Energizing Healthcare" 7/15/2010
  • Healthcare Facilities Symposium & Expo, Chicago, IL "Energy Independence" 9/15/2010


  • U.S. DOE Energy Alliance Supplier Summit, Chicago, IL "HVAC Controls" 1/29/2009
  • ASHRAE Chapter Meeting, La Crosse, WI "Energizing Healthcare" 2/19/2009
  • Kaiser Permanente Energy Think Tank, San Francisco, CA "Envision" 10/15/2009
  • Biocycle Conference, Minneapolis, MN "Brewery/Hospital Renewable Partnership" 10/19/2009

Contact Us

1900 South Ave.
La Crosse, WI 54601

(608) 782-7300

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