Dumbrell will take up the role next month, the line confirmed on Thursday (28 January).
He joins from ROL Cruise and brings extensive travel sector experience to the role.
The line said Dumbrell was passionate about working with its trade partners, and would use his knowledge of the British travel sector to builder stronger ties with agents.
Alfredo Spadon, Swan Hellenic senior vice-president global sales and marketing, said: “I’m excited to welcome Tom into the Swan Hellenic family.
"His solid experience, dynamism and passion for the cruise industry will, I am sure, play a key role in re-establishing the Swan Hellenic brand and building awareness within the UK trade, where our heritage began some 70 years ago.”
Dumbrell started his career with Fred Olsen, to which he returned after a stint with STA Travel.
He joined APT in 2016 before a lengthy spell with Belmond, serving first as senior sales manager and later director of sales across the firm’s rail and cruise operators.
He moved to Tauck in January last year and then to ROL Cruise before joining Swan Hellenic.
The line said Dumbrell would bring "an exceptional combination of youthful energy, out-of-the-box thinking and extensive cruise industry sales management experience" to the role.
It added he would be instrumental in identifying gaps in the market to drive "rapid expansion" as people return to the seas following the Covid crisis.
