Kilmarnock boss makes his return to the game in Essex following his departure from Rugby Park in January. Dyer, 55, will be No 2 to Hayden Mullins who kept the U's in Sky Bet League Two following a wretched campaign.Colchester parted company with last summer's appointment Steve Ball and then dispensed with the services of interim gaffer Wayne Brown in March with Mullins ultimately getting them over the safety line as Essex rivals Southend United and Grimsby Town went down to the Vanarama National League.
