Following two years supporting Travelmarvel in Ireland, Ryan will now help drive growth for both Travelmarvel and APT Luxury in Northern Ireland too.
The company said Ryan had played "a key role" in developing the Irish market since joining in 2024.
It confirmed the Travelmarvel brand in Ireland had achieved double-digit, year-on-year sales growth and had also strengthen trade relationships during Ryan's stint there.
Brad Bennetts, Head of Sales, APT Luxury and Travelmarvel, said: “Ireland represents a significant growth opportunity for both APT Luxury and Travelmarvel, and we're delighted to expand Michelle's role to provide dedicated, on-the-ground support for agents.
"Already well known in the market from her years of industry experience, Michelle has a strong track record of supporting and growing brand recognition in the Northern Irish market."
He added: "When we entered the Irish market, we were one of only a handful of river cruise operators actively investing in the region.
"As the market continues to evolve and attract new entrants, maintaining a strong local presence is more important than ever.”
Meanwhile, Ryan said: "With the rapid growth of the Irish market over the last two years, I am excited to extend my support to agents in Northern Ireland.
"I’ve had the pleasure of working with the market previously and know firsthand how important having dedicated on-the-ground support is."
