Omaha, Neb.-based HDR, an engineering consulting firm, has acquired New York-based Daniel Frankfurt, an architecture-engineering firm, and Lexington, Ky.-based Quest Engineers.

Beverly, Mass.-based Gatsometer, a manufacturer of speed and red light enforcement devices, is expanding its services in the United States to include citation mailing and fine collection.

Hauppauge, N.Y.-based Odyne has entered into an agreement with Chino, Calif.-based Creative Bus Sales to sell Odyne's hybrid electric trucks and buses.

Atlanta-based design and engineering firm Heery International has acquired Miami-based architectural and project management firm Sequeira & Gavarrete.

Harrington Park, N.J.-based United Water, a provider of water and wastewater services, has acquired the New York subsidiary of Bridgeport, Conn.-based Aquarion Water. The new company is named United Water Westchester.

Wayne, Pa.-based Resun has acquired Norwalk, Conn.-based General Electric Capital Corporation's modular space business. The new company is named Modspace.