Early career He won the 2010
IBSF World Snooker Championship in Damascus, Syria, defeating India's
Pankaj Advani 10–7 in the final. This earned him a place on the professional Main Tour for the
2011–12 season.
Debut season Due to being a new player on the tour and therefore unranked he would need to win four qualifying matches to reach the ranking event main draws. He came closest to doing this in the
World Open when he beat
Andrew Pagett and
Liu Song, before losing to
Michael Holt 4–5. Poomjaeng played all 12 of the minor-ranking
Players Tour Championship events throughout the season, with his best finish coming in
Event 8 where he beat seven-time world champion
Stephen Hendry and
Stephen Maguire to reach the last 16, but succumbed 1–4 to
Ben Woollaston. However, his final placing of 57th on the PTC
Order of Merit was good enough to earn him a spot for next season.
2012/2013 season The
2012–13 season saw Poomjaeng qualify for the main draw of a ranking event for the first time. This came in the
2013 German Masters, by defeating
Yu Delu and
Fergal O'Brien. He lost 2–5 to
Barry Hawkins in the first round in
Berlin. Poomjaeng continued his form by winning four matches to reach the
China Open. Once at the venue in
Beijing, he saw off Zhu Yinghui 5–2 in the wildcard round, but then lost 3–5 to
Mark Davis in the first round. Poomjaeng beat
Michael Leslie 10–4,
Liu Chuang 10–9,
Anthony Hamilton 10–4 and
Jamie Cope 10–3 to qualify for the
World Championship for the first time. He faced sixth seed
Stephen Maguire in the first round and produced a huge shock with the world number 70 Poomjaeng winning 10–9, with a composed 63 break in the final frame. The crowd warmed to Poomjaeng as he walked to the wrong table at the start of play and animatedly expressed his emotions throughout the match, including applauding his own safety shot. He played
Michael White in the second round and lost the fourth frame without a ball having been potted due to missing the reds three times. The rules of snooker state that if a red can be seen full ball and is missed on three consecutive shots, the frame is conceded. Poomjaeng lost the session 1–7 and went on to be defeated 3–13. Poomjaeng finished the season ranked world number 67.
2013/2014 season In his opening match of the season, Poomjaeng defeated
Darren Cook 5–1 to qualify for the
2013 Wuxi Classic in
China where he beat
Dominic Dale 5–1 in the first round, before losing by a reverse of this scoreline to
John Higgins. Poomjaeng then won three matches to qualify for the
Australian Goldfields Open, but lost 5–1 to
Barry Hawkins in the first round. He lost in the last 32 of the
Indian Open to
Liang Wenbo and at the
UK Championship, lost 6–0 in the second round to world number four
Judd Trump, having defeated fellow Thai player
Thepchaiya Un-Nooh 6–5 in the opening round. Poomjaeng eliminated defending champion
Ali Carter 5–4 in the opening round of the
German Masters, after having trailed 4–2, but was then beaten in a deciding frame by
Xiao Guodong in the second round. His fourth exit in the last 32 of a ranking event this season came at the
China Open as
Shaun Murphy whitewashed him 5–0. Poomjaeng saw off
Zhang Anda and
Craig Steadman to stand one match away from playing in the
World Championship for the second year in a row, but from 4–2 ahead he lost eight of the last nine frames against 1997 champion
Ken Doherty to miss out. He rose 20 spots to be ranked world number 47 at the end of the season.
2014/2015 season At the
Paul Hunter Classic, Poomjaeng won three matches and then defeated
Neil Robertson 4–2 to reach the quarter-finals where he lost 4–2 to
Rod Lawler. This result would later help him finish 32nd on the Order of Merit. Poomjaeng's first appearance at a ranking event this season was at the
International Championship, but he was beaten 6–2 by
Mark Davis in the first round. At the
UK Championship he recorded wins over
Andrew Norman and
Michael Holt, before
Marco Fu knocked him out 6–3 in the third round. Fu also eliminated Poomjaeng in the second round of the
Welsh Open this time 4–2. Poomjaeng won three frames in a row from 3–1 down against Robertson in the first round of the
China Open with the match eventually going into a deciding frame. Poomjaeng took it on the final black and then whitewashed
Jack Lisowski 5–0 to play in the last 16 of a ranking event for the only time this season, where he lost 5–1 against
Gary Wilson.
2015/2016 season Poomjaeng was narrowly beaten 6–5 by
Michael White in the first round of the
International Championship. He defeated
Chris Melling 6–4 and
Ryan Day 6–2 at the
UK Championship and recovered from 5–0 down against
Mark Joyce to win 6–5 and reach the fourth round. He potted just 13 points in the first five frames against
Mark Selby and there was no comeback this time as he lost 6–1. A pair of 4–1 victories over
Craig Steadman and
Robert Milkins saw Poomjaeng reach the third round of the
Welsh Open, where he was beaten 4–3 by
Yu Delu. Poomjaeng lost 5–4 to
Ryan Day in the first round of the
China Open, but saw off
Eden Sharav 10–4 and
Robin Hull 10–5 to reach the final qualifying round for the
World Championship. He fell just short of playing at the Crucible again as he lost 10–9 to
Mitchell Mann.
2016/2017 season Poomjaeng had an extremely poor
2016–17 season. He did not get past the last 64 of a single event and was on a losing run of 11 matches until he beat
Chen Zhe 10–7 in
World Championship qualifying. Poomjaeng lost 10–4 to
Graeme Dott in the next round and finished 70th in the rankings having started the season 45th. He did not enter Q School and has therefore been relegated from the snooker tour. and then lost again in the final round of the second event to
Zhao Xintong 2022/2023 season Poomjaeng returned to the tour through Q School Asia-Oceania Event 2.
2023/2024 season On 30 October 2023, he announced he will not return to the tour during his existing two-year tour card for personal reasons. ==Personal life==