With offices in White Bear Lake and Duluth, Minnesota, Hallberg Engineering (HEI) offers a full range of services to satisfy all of your mechanical, electrical and technology systems design and operations needs. Our process includes thorough, efficient coordination with a building owner's staff and design team, project consultants and architectural and interior design firms. Our services include: mechanical, electrical and technology design services; commissioning, recommissioning and retro-commissioning; energy modeling and property condition assessments. With a team of 40+ engineering design and service professionals and support staff, plus licensing in 49 states and four Canadian Provinces, HEI is able to provide design excellence that delivers enduring value for building owners.