For over 74 years, Oscar W. Larson Company has served the Midwest as a leader in full service petroleum and fluid handling eq ... uipment contracting. It's nice to know that when you choose Oscar W. Larson Company, you'll be working with a company that brings decades of expertise to every project. With over 350 skilled employees across 10 locations in 4 states, we are uniquely qualified to provide comprehensive solutions for all of your project needs. Our factory trained technicians and licensed mechanical, electrical, and HVAC contractors deliver "one stop" shopping to meet all design, construction, excavation, remodeling, installation, service, building maintenance, product consultation, and sales needs. read more