Engineer-of-Choice Relationship

Salas O’Brien’s Minnesota and Wisconsin teams were founded in 2001 to help regional hospitals in the Mayo Clinic System better manage seasonal spikes in utility fees. Twenty years later, we continue to advance Mayo’s defining commitment to sustainability with engineered systems that leverage energy-saving, carbon-reducing technologies and strategies.

Recent projects include a duel wheel desiccant approach to reducing operating room temperatures and relative humidity at Mayo Wishart, lowering operating and life cycle costs with no downtime during system changes. At Mayo Clinic Health System Menomonie, the geothermal system we designed reduces annual energy use by 40 percent, providing a two-year return on investment. Flexible engineered system elsewhere on that campus allow reconfiguration of spaces to accommodate changing therapies.

Completion Year


Construction Cost

2.5 million square feet