Toby Joseph, one of the founder members of TQ3 Travel Solutions is leaving the company as it completes its takeover by BCD Holdings.
Mr Joseph, TQ3's global chief operating officer since the agency was set up five years ago, said he plans to take a "long holiday" before resuming his career, probably in business travel management.
He told BTE: "I'll be taking a long break and then will consider a number of options, probably in the industry. There's no urgency."
Mr Joseph, 46, spent 15 years with Carlson Wagonlit Travel before joining TQ3 before its launch.
"These were amazing times. We built up a global company and aimed to have full ownership on both sides of the Atlantic and we achieved that," he said.
He said he would be leaving TQ3 in the next couple of weeks as the new coo is appointed.
In a statement, Marc Hildebrand, ceo and president of TQ3, said: "Toby will be hugely missed for his energy, drive, enthusiasm and unrivalled industry knowledge. Without his determination, global experience and vision TQ3 would not have achieved what we have done."
TQ3 Travel Solutions Management Holding was bought in January by BCD Holdings which owns WorldTravel BTI.
It was part of a series of upheavals in business travel management that month.
The takeover ended the global agreement TQ3 Travel Solutions Management Holding and its US partner Navigant International.
TQ3 Travel Solutions Management Holding transferred its 50% stake in TQ3 Travel Solutions to Navigant which owned the other 50%. The name TQ3 Travel Solutions went to Navigant.
At the same time, BCD ended its partnership with Hogg Robinson as the two companies agreed to go their separate ways.
BCD also bought The Travel Company, a leading independent UK company.
BCD is expected to announce the name for its new grouping of WorldTravel, TQ3 Management Holding and The Travel Company later this month.