Since his first appointment in 1983 (as an umpire appointed by two LMAA arbitrators), Michael has had several hundred appointments and issued hundreds of awards covering a wide spectrum of commercial disputes.  Many of them have had a maritime flavour: charterparty disputes, cargo claims, general average, ship collisions, salvage, wreck removal and so on.  But he has also been appointed in disputes relating to sale of goods, agency and other commercial disputes.  He has acted as umpire, chairman, sole arbitrator, third arbitrator and wingman.
He has been appointed as an ICC arbitrator; an LCIA arbitrator; and LMAA arbitrator.  He was a Lloyd’s Salvage Arbitrator  for 20 years.  He is a member of the LCIA Company, and a supporting member of the L.M.A.A.