Clinch will start in early March and previously worked at J Rothschild Capital Management, where he was an investment manager.
Prior to J Rothschild, he was a director of US equities at F&C (2005 to 2008) and before that a senior fund manager and head of North American equities at Aberdeen (2001 to 2005).
At both fund houses he was responsible for the management of a range of portfolios for both retail and institutional clients.
Nick Mustoe, chief investment officer at Invesco Perpetual, said his appointment would enable the firm to further develop its global and US equity franchises