In his first season at Melbourne Victory in 2005/06, the club failed to live up to its championship aspirations. With SocceroosArchie Thompson and Kevin Muscat in the squad, and the experience of 2 European internationals in Geoffrey Claeys and Richard Kitzbichler, expectations from the Melbourne fans were high. But they were left disappointed when the club finished the season 7th out of the 8 teams. After a promising start which saw them 1st after round 8, when they beat eventual champions Sydney FC 5–0, the team then won only 3 of the last 13 games. During the second season, The Victory won the 2006–07 A-League Premiership, 12 points clear of second placed Adelaide United. Melbourne Victory faced Adelaide United in the A-League Grand Final at the Telstra Dome on 18 February, winning the match 6–0 with Archie Thompson scoring an incredible five goals. The 2007–2008 season was a return to the disappointment of Merrick's first year in charge however, with the team finishing outside the Top 4 spots and thus failing to progress to the Finals Series. Melbourne Victory finished second in the group phase of the 2008 Asian Champions League. Gamba Osaka won the group and went on to win the Asian Champions League. In the 2008–2009 season, Melbourne Victory won the treble; the Pre-Season Cup, the Premiership and the Grand Final. In the Grand Final, Melbourne Victory defeated Adelaide United 1–0 to secure their second championship under Ernie Merrick's coaching. During the 2009–2010 season, Melbourne Victory, despite severe season-ending knee injuries to key players, Billy Celeski, Matthew Kemp and star striker Archie Thompson once again reached the Grand Final. Sydney FC took out the title after extra timeon penalties. Kevin Muscat and Marvin Angulo missed their penalty kicks, allowing Sydney to take out the championship. On 12 March 2011, Ernie Merrick was sacked from his post at Melbourne Victory. The board of Melbourne Victory stated that they were unhappy with Victory's season and the 5–1 defeat by Gamba Osaka in Japan in the opening match of the Asian Champions League. Anthony Di Pietro, chairman of Melbourne Victory, said "Our club sets extremely high standards and we are disappointed with the results of the recent A-League season and also our start to the Champions League campaign" and that "Our intent is to continue to be the benchmark club in the A-League. We wish to be successful in Asia and believe this decision will assist in taking us to that level." Merrick was the last foundation coach to be sacked. Ernie Merrick was awarded coach of the year in 2007 and again in 2010.
The Hong Kong Football Association, on 16 December 2011, confirmed the appointment of Ernie Merrick as the new National Head Coach. On 26 October 2012, it was confirmed that Ernie Merrick left his position as the team's Head Coach.
Wellington Phoenix
On 20 May 2013, Merrick was announced as the head coach for Wellington Phoenix on a two-year contract, with an option for a third year. On 5 December 2016, Merrick resigned from the Phoenix following a 2–0 loss to Adelaide United.
Newcastle Jets
In May 2017, Merrick was announced as the new coach of Newcastle Jets, following the sacking of Mark Jones after Newcastle Jets finished bottom of the league in the 2016–17 season.Merrick took the Jets to the Grand Final in his first year at the club. The Jets played Melbourne Victory and lost the game after a controversial VAR decision. The following year Sydney FC made an offer to him but he declined and on 17 April 2018, Merrick signed an improved contract keeping him with the Jets until the end of the 2019/20 Hyundai A-League season. Merrick was sacked by the Jets on 6th January, 2020
Personal life
Merrick was born in Edinburgh to a circus family. Before entering the head coaching ranks, he was a PE teacher as well as an amateur football player.
