Bayliss was born and grew up in the country town of Goulburn, New South Wales, before moving to Sydney to play for the NSW state team.

[1] After the end of his playing career, Bayliss became a development officer for the New South Wales Cricket Association and coached the NSW second XI for a number of years.

He replaced Steve Rixon as NSW coach in 2004–05 and led the state to the Pura Cup final where they defeated Queensland by 1 wicket.

Trevor Bayliss succeeded Tom Moody as the coach of the Sri Lankan national team in August 2007.

He was selected ahead of Queensland Bulls coach Terry Oliver by a selection committee comprising former Sri Lanka Cricket officials and captains including Aravinda de Silva, Ranjan Madugalle, Michael Tissera, Sidath Wettimuny and Bandula Warnapura.

In the Commonwealth Bank series with Australia and India, Sri Lanka finished bottom of the group, 2-5 (one game was abandoned).

They beat the Hobart Hurricanes in the semi-final stage of the competition to qualify for the final, where they met the Perth Scorchers.

In the 2013/14 season, Sydney finished second in the league after winning six of their eight games, meaning they qualified for the knock out stage of the competition.

[7][8] The team won twelve matches and lost just five to finish in second place in the league stage and qualify for the knock out rounds of the competition.

In the final they met Kings XI Punjab again and won the game, chasing down a total of 200, to secure their second title in three years.

In the second Test England named an unchanged team but suffered a heavy defeat by 405 runs after a batting collapse in the second innings.

The decision to move Moeen Ali up the order did work out, and England's spinners didn't offer a genuine threat throughout the series.

While England had modified their approach on the sub continent, they still played an aggressive brand of cricket, scoring 355 in the final game of the series.

Sam Billings and James Vince both came into the side and impressed, with Vince being named man of the series, while Chris Jordan returned to the side and demonstrated his credentials as a death bowler, bowling the Super Over in the final game of the series to help England win it 3–0, and make it six victories on the bounce.

After a high scoring second match, in which Ben Stokes and Jonny Bairstow both hit centuries, England won the third game of the series thanks to a superb bowling display from Stuart Broad.

However, Alex Hales' form with the bat was a major positive for England as was the emergence of Reece Topley in the bowling unit.

They lost the first game against the West Indies, and looked to be heading for defeat against South Africa, but Jason Roy and Joe Root ensured they chased down 230 for victory.

It looked like a collapse would be on the cards against Afghanistan, but Moeen Ali and David Willey lead the recovery to help England to a 15 run victory.

Good death bowling from David Willey and Chris Jordan saw England restrict their opponents to 153–8, and they went on to win the match by seven wickets.

England won the first Test by an innings and 88 runs, with James Anderson taking ten wickets in the match.

England followed this up with another convincing victory, this time winning by 9 wickets after a Moeen Ali century and further impressive bowling performances from James Anderson and Stuart Broad.

England won the next match by 10 wickets after a record breaking opening stand from Alex Hales and Jason Roy, before the third game finished in a draw due to rain.

Dawson was particularly impressive, tasking figures of 3–27, before an unbeaten 73 from Jos Buttler saw England record an eight wicket victory, and meant they had not lost in their nine matches against Bayliss' former side.

In the ODI series England again kept a similar squad, and secured comfortable victories over Pakistan in the first two matches.

Ben Duckett and Haseeb Hameed both received their first call-ups, with Zafar Ansari, Gareth Batty and Adil Rashid also included.

Four players, Alistair Cook, Joe Root, Ben Stokes and Moeen Ali scored centuries for England in the match.

Due to the poor form of both Ben Duckett and Gary Balance, Jos Buttler played in the third Test as the only other reserve batsman in the squad.

Haseeb Hameed batted well for England in their second innings, although India chased down their small target to win by eight wickets.

The second game proved closer, but an impressive partnership between Joe Root and Chris Woakes saw England chase down their target of 226 to win by four wickets.

Bayliss was appointed Officer of the Order of the British Empire (OBE) in the 2020 New Year Honours for services to cricket.