Kenney grew up on the coast of Maine in the town of Searsport, living an outdoorsy life that even involved hunting. He once worked at meat-centric restaurants in the state after attending the French Culinary Institute and for a time owned a vegan restaurant, The Gothic, in Belfast, Maine.

In 2021, Kenney launched Xfood, a vegan-based food delivery service initially operating out of Los Angeles. The service features meals produced using a no-waste food initiative and packaged using environmentally friendly materials.

Kenney founded Plant City, the "world's first vegan food hall and marketplace." It features four vegan restaurants, a coffee shop, a commissary kitchen, an event space, and a communal area for cooking classes and meditation sessions.

Kenney runs the Food Future Institute, a vegan culinary education program that operates online and on-site in Venice, California. The online class allows students to progress at their own pace with various educational videos, while the on-site campus classrooms include the finest cooking equipment.

Kenney has written 12 cookbooks and a memoir entitled “Cooked Raw.” His first cookbook, "Big City Cooking," is a guide on how to use and prepare the best and freshest ingredients available in large cities.