Mr Coslett has been a community representative for the Ministry of Social Developments’ Benefits Review Committee since December 2000. He has been President and Chair of the Auckland Welsh Club and between 1992 and 1994 he was the coordinator for community sponsorship for Welsh emigrants, advising on and supporting the immigration process for a large number of Welsh emigrants to New Zealand. He has served as Chairperson of the Club’s Board of Trustees. He was the presenter of the fortnightly programme ‘Echoes of Wales’ on Access Community Radio in the 1990s. He was involved with the Auckland Chamber of Commerce from 2000 to 2005. He has been a Council member of the New Zealand Institute of Management and a Committee member of the Association of Factory and Production Managers. Mr Coslett has been involved with a number of local rugby clubs in administrative and leadership positions.