Carollo Engineers, a water/wastewater engineering firm, relocated its Omaha office from Miracle Hills to the Carson 2 Building in Heartwood Preserve southwest of 144th & West Dodge Road. The firm is leasing space from Felsburg Holt & Ullevig, which also recently relocated to the building. California-based Carollo has locations across the country. The new office will allow the firm to add new engineers, project managers and BIM designers.