The foodservice and business solutions company will provide 66 vending machines across the Trust area, which spans the five council areas of Limavady, Londonderry, Strabane, Omagh and Fermanagh.
The six-figure contract will last three years, with an option to extend for a further two years.
Cathal Geoghegan, managing director of The Mount Charles Group, said: “We are actively focusing on growing our business across the West of Northern Ireland, as well as into Donegal and the Dublin corridor.
“As such, we view this contract as a strategic win that will allow us to further build our profile and reputation in a key region and we very much look forward to growing our relationship with the health and social care trust.”
The Mount Charles Group has also retained its contract with the South Eastern Regional College (SERC) after a competitive tendering process. The contact will be in place for five years.
The Group delivers catering, vending, cleaning and ancillary services for the Bangor and Newtownards campuses of SERC; catering for approximately 16,000 students and 700 members of staff.