An investigation into the 2006 incident is being carried out by the NFDC's accident investigation committee, reports Demolition News.
Micor is still listed on the Federation website, but its entry has been marked 'suspended'.
The 43-year old Gary Drinkald, an employee of the contractor, was killed when a concrete beam fell and crushed him on a site in Basildon.
Following a Health and Safety Executive investigation, Micor was fined £100,000 and ordered to pay £20,000 in costs.
“As a Federation, we believe that the welfare of demolition workers is of paramount importance and that it must be safeguarded at all costs,” said NFDC President Gary Bishop.
“While we do not question the findings of the HSE investigation, we feel that a further investigation is required to ensure that there is no repeat of this tragic incident in the future. Of course, we do not take the suspension of a member lightly but, in this instance, we believe that it would be in the best interests of all concerned if Micor’s membership was temporarily suspended while that investigation takes place.”