Rennie’s early photographic work focused on sharing his experiences of Alaska with a global audience through social media (Instagram & Twitter), web (Buzzfeed, CNN, Complex, Highsnobiety) and print based outlets. He has continued to use photography as a means of expression and connection within his community.

In 2018, Rennie co-founded Akela Space, a gallery showcasing contemporary Alaska art. Developing projects at the intersection of art and social justice, Rennie organized the exhibition I Can’t Breathe in 2020, in response to the murder of George Floyd at the hands of Minneapolis police. He is also the creative lead for the Black in Alaska storytelling project, supported by the Rasmuson Foundation, Vice-Chair of the Municipality of Anchorage Arts Advisory Council, and previously served as an advisor for Black Lives in Alaska: Journey, Justice, Joy, an exhibition at the Anchorage Museum.