Dato' Hj. Wan Ahmad joined Administration and Diplomatic Service in 1972 and has served SPR from 1998.

1972 - 75 : Assistant Secretary, Prime Minister's Department
1976 - 79 : Second Secretary, Higher Commission of Malaysia, Singapore
1979 - 80 : Secretary, Malacca Town Council
1980 - 82 : Principal Assistant Secretary, Prime Minister Department
1983 - 85 : Political Counsellor, Malaysia Embassy, Philippines
1989 - 91 : Minister Counsellor (Political), Malaysia Embassy, Washington D.C
1992 - 97 : Section Secretary in Prime Minister's Department
1998 - 2004 : Secretary, Commission Election Malaysia
2004 - now : Deputy Chairman, Election Commission Malaysia