In 1967, he got a job with noted UK underground newspaper International Times delivering the paper and posters from Osiris Visions to outlets around London.
[3] He then partnered with Paul Dobson and Graham Blyth to form his first company, RSD, building custom PA systems for Roy Wood's Wizzard and Steve Harley & Cockney Rebel amongst others, with custom-built mixing consoles derived from a Bill Kelsey original design.
[5] In 1973, Dudderidge and Blyth left RSD to form Soundcraft Electronics, Ltd.,[6] the company specializing in live sound and recording mixing consoles.
Dudderidge's involvement with this company also led to his working with notable pro audio industry figures Betty Bennett (now CEO of Apogee Electronics Corporation), Wayne Freeman (of Trident USA, Fairlight, Amek, Otari, and most notably Marshall Electronics), and Shane Morris (designer of the ATI Paragon monitor console and later of PRS Guitars).
Dudderidge was appointed Officer of the Order of the British Empire (OBE) in the 2024 New Year Honours for services to business and the music industry.