The singer, who made the announcement over Twitter last night (19 June), will be modelling the iconic label's denim styles and fashion collections for the upcoming fall campaign.
Max, 24, has been lined up for the campaign alongside Swimsuit Illustrated model Hannah Davis. He tweeted: "Excited to announce I'm going to be the new face for @BuffaloJeans this year! Cheers :) #Max4Buffalo."
Max was also excited to be working alongside Hannah, adding: "Thanks to @BuffaloJeans for the amazing opportunity! ...p.s. how hot is @hanni_davis ?! X #Max4Buffalo."
Max now follows in the similar footsteps of band mate Siva Kaneswaran, who is developing a fashion profile of his own after signing a modelling contract with Next Model Management.
The first look at the new campaign shows Max, who wears a blue knit and denim jeans, smouldering for the camera in a forest setting.
Meanwhile Hannah, who kneels on a leather couch, snuggles up to Max while flaunting her figure in skinny jeans and a leopard print blouse.
Buffalo's Dari Marder said, "Buffalo has always had beautiful and sexy imagery in its campaigns but we're turning up the heat this season by adding some star power with Max and Hannah."