Nick Davies followed manager Chris Hughton from Birmingham to Norwich in 2013 and became City's Head of Sport Science. He had previously worked for West Ham twice.

On 19th June 2017, the club announced that Davies was leaving following Stuart Webber's reshuffle and he was replaced by Chrs Domogalla.

Webber said: “We’d like to place on record our sincere thanks to Nick, who has done a great job heading up our fitness and sport science department for the past four years and we wish him all the very best for the future.”

He joined West Brom as their Head of Sport Science and Performance in June 2018.

Davies left the Baggies on 26th June 2021 days after Barnsley's Valerien Ismael was appointed as the head coach after Sam Allardyce stepped down following the Baggies relegation from the top-flight last season. The following month he joined West Ham for the third time in his career.

In March 2023 he took on the role of Head of Performance for the Welsh national team replacing Tony Strudwick.