McDermott will develop sales opportunities that include design, digital and direct mail production services at the Nottingham-based group.
He joins from Oryx Print Solutions and brings more than 12 years experience working for a number of major print management companies.
Tony Cowlishaw, sales director at Perspektiv, said: "Liam's knowledge of print, direct mail and digital production, combined with his graphics background, makes him ideal for our future development plans here at Perspektiv and we are pleased to welcome him."
McDermott said he aims to "carry the business forward further still" in the new position.
The company, which is part of direct mail and print arm of marketing group Perspektiv, installed a Xerox iGen3 110 to boost its digital print capacity, earlier this year.
Perspektiv Direct aims to boost sales with new appointment
Perspektiv Direct has bolstered its management team with the addition of Liam McDermott in the role of business development manager.