D'Mello will be based in the UK and is responsible for advancing existing and developing new global partnerships with both clients and suppliers.
The widely-travelled D'Mello said: "Living like a local brings tremendous depth in truly understanding what an international assignee would experience and need to get comfortably settled."
She added: "With the rapid growth of a global economy fuelling the need to mobilise talent, the high demand necessitates the need for efficient technology. ReloQuest provides a universal solution to alleviate the workload for global mobility and travel professionals. This offers actionable insights via analytics, and a cohesive method to source serviced apartments and hotels worldwide. I am ecstatic about unveiling ReloQuest's Certified Supplier Program next month which will standardise the vetting process in the temporary housing and serviced apartment industry."
ReloQuest founder and CEO Darin Karp said: "We are very pleased to welcome Denise D'Mello as part of our team. I am confident Denise's 15 years of accomplishments in global business development, providing exceptional service and her expertise in growing a supply chain will bring value to all clients and play an integral role in fulfilling the exponential growth ReloQuest is experiencing."