The agency will trade as HRG Tunisia, and manager Mehdi Eljawadi said the country was experiencing a boom in business activity.
"It is a promising time for North Africa as the region experiences an upward trend in business activity and foreign investments," added Eljawadi. "Working closely with HRG offers our clients the knowledge and technology from the full global network, ensuring they are getting the very best service."
HRG central services director Keith Burgess said: "We're pleased to welcome Corporate Travel & Events to the HRG worldwide network. They are well respected in Tunisia and we look forward to working with their forward-thinking team to bring their regional services and expertise to our global clients."