The men, now unemployed, had worked on an Islington Council utilities contract for six years, but claim that Dartford-based FM Conway started victimising them after taking over the contract in January 2008.
The Kosovans claim that FM Conway wanted them to work 'self-employed' on piecework when they wished to remain PAYE employees. They were dismissed in June 2008 on what they claim were 'trumped-up' charges that they were blackmailing the company with the intention of extorting money.
The men also claim that they were called 'Kosovan Mafia'.
The tribunal will take place on 3 and 4 December.
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