The final seasons of Jackman's Surrey career were to be among his most successful, and he played a leading role in the county reaching the final of the NatWest Trophy in 1982, where they trounced Warwickshire by nine wickets. After playing in an ODI for England against New Zealand in February 1983, he announced his retirement, just one short of 400 career First Class matches, in which he took 1,402 wickets. As a lower order batter, usually going in at 10, he also scored 17 domestic half-centuries with a career highest score of 92 not out.