McHugh, who has previously worked for Warburtons and Unilever, has been appointed manufacturing director, and will oversee the development of the manufacturing strategy for the Genius and Livwell brands, both of which produce a range of gluten- and wheat-free bakery products.
In addition, he will help to develop the firm’s own-label capability which Genius has said will "achieve the company’s ambitious domestic and international growth targets".
It comes after it was revealed earlier this month that Genius has acquired two bakeries from Finsbury Foods, including United Central Bakeries in Bathgate and Livwell in Hull.
Roz Cuschieri, chief executive of Genius, said: "Liam brings a wealth of experience and expertise to Genius. He has an in-depth knowledge of manufacturing processes, change management, people development, plus innovation and is perfectly suited to help drive our expansion plans at home and internationally.
"Liam’s appointment reinforces our ambitions to become a truly global brand. He joins a world-class senior management team and will play a pivotal role in Genius’ future."
McHugh said: "Genius is one of the most high-profile, innovative and fast-growing food businesses in the UK. I am delighted to have an opportunity to help the company to continue to grow and expand."