John F.O'Gorman completed his learning in London and was appointed by the Department of Agricultural and Technical Instruction, to teach the Theory of Road Carriage Building.

Shortly after the First World War, John F. O'Gorman went to Germany and captured the first main dealership in Ireland for Mercedes-Benz cars.

[2][3] In the late 1920s this enterprise, situated at the factory premises, held a ten-week course at the school and included (a) Mechanism and Ignition and (b) Driving and Tyrefitting.

[4][5] The administrative offices of O'Gormans were situated over the shop front show room, garage at 36 & 37 Parnell Street (next to Hearns Hotel, where Charles Bianconi established his horse-drawn coach travel empire, 90 years earlier).

[4][6] The O'Gorman brothers were discussed in Dáil Éireann Volume 3–18 May 1923 with regard to a strike at their Clonmel factory and bringing in workers (non-union strikebreakers) from London.

It was proposed the company should not be allowed to carry out Government work, under conditions which are a distinct breach of the Fair Wages Clause.

[7] O'Gorman Brothers supplied Mercedes-Benz 4 ton vehicles to the Irish Free State army authorities in 1927.

[11] John F. O'Gorman voiced a complaint in the Dáil Éireann, Section 554 - 25 February 1931,[12] about the ease and amount of ash being exported (the principal raw wood material for the industry).

Messrs O'Gorman, were also quoted by Seán Lemass during a Dáil Éireann debate, Volume 45–22 December 1932 (Finance (Customs Duties) (No.

On part of the grounds near Clonmel railway station, a large factory was built, to make bodywork for road vehicles.

Prior Park house, lived in by John F. O'Gorman and his large family,[14][15] was originally a girls' boarding school (run by Quakers).

After her death he married again on 16 January 1929, Catherine O'Brien of Shanagolden, County Limerick (1902 – 20 October 1970) and they had 5 boys and 4 girls.

In his obituary in The Nationalist, it describes him as having exceptional ability and he took a keen interest in the development of Irish industry generally and worked for its advancement for many years, especially in Clonmel.

In April 1925 a group of local business people including John F. O'Gorman established the Clonmel Chamber of Commerce — J.F.

They include a picture of J.F.O'Gorman, the directors, workers, the factory premises, Prior Park house and various machinery in the workshop.