The company will trade as HRG Peru and will support HRG’s clients with dedicated local and regional expertise.
Diners Travel was established in 1975 and has two offices in Lima, employing 28 staff.
The company provides a full travel management service for clients in sectors including banking, pharmaceutical, construction, mining and retail.
HRG central services director Keith Burgess said: "There is a lot of excitement about the burgeoning corporate travel market in Peru.
"The country has benefited from a stable political and economic situation, leading to growth of 6.4% per year since 2002. Peru’s convenient location is also a factor in its emergence as a business travel hub, and connectivity to the region is improving consistently."