J. Lambek had 6 appointments :

Publications Ad-Hoc Committees		1957 - 1957
C.J.M. - C.M.B. Specialized Editors		1957 - 1959
C.M.B. Editorial Board (1949-1985)		1959 - 1960
Board of Directors		1961 - 1965
C.M.B. Editorial Board (1949-1985)		1966 - 1970
Board of Directors		1971 - 1973