Dennis Eagle's history dates back to 1907, when Eagle Engineering Company was incorporated in Warwick. The company specialized in refuse collection vehicles and road sweepers.

In the early 1920s, Dennis Brothers, a builder of buses, fire engines, and haulage lorries, began to produce specialized vehicles for municipal authorities.

In 1971, Hestair Group bought Yorkshire Vehicles Limited in Leeds and Eagle Engineering Co in Warwick. Six months later Hestair bought Dennis Motor Holdings and thereafter managed the businesses as the Vehicle Division of Hestair Engineering. Municipal bodies were made in Warwick by Hestair Eagle (incorporating Yorkshire Vehicles), municipal chassis were made by Dennis in Guildford, cabs were made in Blackpool. Hestair set up a special Environmental Vehicles Division for its waste management activities.

In 1974, the Environmental Vehicles Division was renamed Dennis Eagle.

Dennis Eagle has a long history of innovation in the waste management industry. In 1980, the company introduced the first rear-loading refuse collection vehicle (RRV) to the UK market which are the standard type of refuse collection vehicle used in the UK.

They have been a leader in the development of alternative fuel refuse collection vehicles. In 2004, the company introduced the first compressed natural gas (CNG) refuse collection vehicle to the UK market.

The Dennis Eagle Olympus Refuse Truck is a rear-loading refuse collection vehicle (RRV) that is designed to be efficient and reliable. It is available in a variety of configurations to suit different operational needs.