David Mannix

Mannix was a youth England international at under 15/16, 17 and 20 levels and gained 15 caps in total. He scored his first international goal against Poland in a 5–0 victory on 22 November 2001. David was also part of the England team in the 2002 UEFA European Under-17 Football Championship who reached the semi-final in Denmark and finished in 3rd place.

Mannix is a product of Liverpool Football Club's Academy, and played regularly for the reserves, making over 60 appearances. Mannix was one of the youngest ever players to play for Liverpool reserves: he was 15 and was moved to train at Melwood with the first team aged 16. His progress was restricted by a number of serious injuries, including an injury to his right knee in 2001. He was sent to the world-renowned Dr Richard Steadman in Colorado, America who specialises in knee surgery. David returned after his lengthy 3-year injury nightmare and seen himself gain his first team squad number 'Mannix 38' and become a member of the first team squad . He enjoyed being involved in the first team squad which won the UEFA Champions league trophy in 2005 in Istanbul . David Came back to represent England at U20 level . 12 months later he suffered a broken leg whilst playing for Liverpool reserves against Newcastle united . Under-18 Academy manager John Owens said: "At Under-15/Under-16 level David was such a shining light in central midfield. He is a very strong but gifted midfield player. But for his injuries he would be playing regularly for the reserves and making tremendous progress towards being the next Academy player through to the first team squad." In November 2006 he went on loan to Accrington Stanley, but after making a promising debut and being selected in the league 2 team of the week, a slight injury picked up in the game forced him to return after less than a week…

Mannix went on to coaching, becoming a part of management teams across the North West and Wales. He was appointed assistant manager of Clitheroe in April 2018, before joining Bangor City in the same role in 2019. He joined Rylands as assistant manager and first team coach in May 2020. In August 2021, Mannix joined Glossop North End as assistant manager, a position he held until 2022. Mannix also had an International Football Academy based in Liverpool called 'Platinum International Football Academy'. This was dissolved in 2015. He has numerous Qualifications within football which includes FA UEFA A license & Youth.