A determining moment for the rest of his life was the day his attempt to gain admittance to the base amateur theatre company was rebuffed on the grounds that this was reserved to officers.
There was a sufficient air of success to ensure that a number of these early members opted to continue working together when the war ended and they were demobbed and returned to England.
The club was later to become very successful as the Mountview Academy of Theatre Arts, now located in custom-built premises in the South London suburb of Peckham.
Furthermore, especially in later years, he also handled convincingly roles as the Nazi Grand Admiral Karl Dönitz and the Romanian dictator Nicolae Ceausescu.
He was active on the stage at least as late as 2003, when he acted in Adrian Noble's production of Oscar Wilde's play, A Woman of No Importance at London's Theatre Royal Haymarket, where the cast included Rupert Graves, Prunella Scales and Joanne Pearce.
From an early date Nossek appeared in a wide range of TV series, including (in approximately chronological order) the following: The Children of the New Forest, As I Was Saying, Overseas Press Club - Exclusive!, The Black Arrow, Television Playwright, BBC Sunday-Night Theatre, Solo for Canary, McFarlane’s Way, Hancock's Half Hour, The Blackness, Boyd Q.C., Citizen James, Maigret, The Avengers, The Sword in the Web, Thirty Minute Theatre, The New Avengers, A Tale of Two Cities, Undermind, Steptoe and Son, Object Z, Mysteries andcles, Object Z Returns, No Hiding Place, King of the River, Blackmail, Emergency-Ward 10, The Newcomers, Virgin of the Secret Service, Detective, The Power Game, The Flaxton Boys, Macbeth, Fraud Squad, Callan, Poldark (1975), Bill Brand, Little Lord Fauntleroy, ITV Playhouse, Crown Court, Whodunnit?, The Sweeney, Telford’s Change, Prince Regent, We, the Accused, Flickers, The Borgias (1981), Great Expectations (1981), Brideshead Revisited, Theatre Box, Jackanory Playhouse, Jemima Shore Investigates, The Old Men at the Zoo, Cockles, Chance in a Million, Them and Us, Screen Two, Boon, Mr Pye, Worlds Beyond, Drummonds, Bergerac, Behaving Badly, Screenplay, Agatha Christie's Poirot, Parnell and the Englishwoman, Strauss Dynasty, T-Bag, That's Love, Inspector Morse, Kinsey, A Touch of Frost, The Blackheath Poisonings, Maigret (1992), The House of Eliott, Under the Hammer, Dandelion Dead, Peak Practice, Chiller, Pie in the Sky, The Life and Crimes of William Palmer, The Bill, Urban Gothic, Micawber, Waking the Dead, and 20 Things to Do before You’re 30.