In the mid-1960s he had much success in Australasian region, posting several high finishes culminating with a win at the 1967 New Zealand Wills Masters.

The following year he tried out for the PGA Tour and was successful, performing as medallist at the fall Q-School.

He played on the PGA Tour for five seasons, recording a number of top tens, including a runner-up finish in 1970.

Since then, he has worked primarily as a club professional and golf manager in the American state of Ohio.

As of January 1965, he had committed to play a number of Asia Golf Circuit events.

He demonstrated "tremendous putting" to score seven birdies and take a one stroke lead over Peter Thomson, Bob Charles, and Guy Wolstenholme.

[7] In August 1966, he finished joint runner-up at the Engadine Open in Switzerland, four strokes behind Harold Henning.

On 4 December, he shot a final round 66 (−6) to finish joint runner-up with Englishman Clive Clark, three behind champion Kel Nagle.

[10] In January 1967, he held a one-stroke lead over Bill Dunk, at 138 (−8), after the first two rounds of the New Zealand PGA Championship.

[14] In the summer, he qualified for the 1967 Open Championship at Royal Liverpool Golf Club.

In December, he played the New Zealand Wills Masters at Russley Golf Club.

Then, on the par-5 16th, he "played one of the shots of the day," a three-wood approach "clearing tall pines" to finish pin high.

In the final round, he shot a course record 63 to finish in a tie for sixth place.

He shot a final round 70 to tie Frank Phillips at the end of regulation.

[19] In late 1968, Roesink attempted to make the American Professional Golfers (APG) Tour at its qualifying school.

[21] Later in the year, he played the 1969 Open Championship at Royal Lytham & St Annes Golf Club.

[15] Late in the year, he played the 1969 World Cup at Singapore Island Country Club.