11 Sept 1941
Picture of the Simm Certificate of Incorporation

The company is incorporated as GE Simm (Surplus in Modern Machinery) Ltd, during the Second World War. Gilbert Edward Simm and his wife JM Simm are appointed Directors.

June 1951
Name change certificate

The company name changes to GE Simm (Engineering Ltd) as the holding company, trading under the name of GE Simm (Machinery) Ltd, with four divisions: second-hand machinery and valves, conveyor belting, hydraulic mining equipment and air compressors. These eventually go under the trading name – Simm Engineering Group.

Simm premises

Founder Gilbert Edward Simm dies in Australia and his son John Benjamin Simm becomes managing director and subsequently chairman. He changes the whole dynamics of the company and moves the business into its existing premises in Jessell Street, Sheffield.


Compressor Maintenance Ltd is acquired, expanding the compressor division and moving the company in a different direction. The revitalised division signs several large contracts, including with Tetley Brewery.

Picture of a Simm red truck

North Star Remoulds Ltd is acquired and the conveyor belt division name is changed to Simm Vulcanising Services Ltd, thus expanding this side of the business. This division wins major contracts with the Coal Board and CEGB (Central Electricity Generating Board) power stations all over the country.


John B Simm dies suddenly at the age of 57 and the company is taken over by his two daughters, Joanne and Gillian.


Simm Conveyors Services Ltd undergoes a management buyout. This part of the company continues today, run by two former Simm employees.

March 2015
A picture of one of the SImm Engineering Group at an industry event in South Yorkshire, ready to discuss vacuum pump, air compressor, and pneumatic services with potential customers.

Halifax-based company Pennine Pneumatic Services (PPS) purchases the compressed air side of the business, keeping the name Simm Engineering Group going strong in Sheffield and surrounding areas. Joanne and Gillian retain the mining side of the company, which is renamed Simm Mining Products, selling hydraulic mining equipment around the world to offshore and mining industries.


Picture of the PPS Compressed Air Specialist logo

Simm Engineering prospers under the umbrella of PPS, with new products brought on board and a growing team.

Simm Engineering Group 75 years Logo

The company celebrates its 75th anniversary.

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