Joe McDonald is Co-Founder and CEO of tem, a London-based AI-native energy transactions platform that connects businesses directly with renewable energy generators, reducing energy bills by up to 30%.

Joe studied at Queen Mary, University of London and became a founding employee at Limejump, rising to Vice President of Sales and Product before the company was acquired by Shell in 2019.

Joe was named to Forbes 30 Under 30 Europe in 2019 for his commercial work in the energy industry. After being rejected by Google for not being considered 'Google material,' he was advised to pursue startups instead, which led him to the energy sector.

tem has raised $94M in total funding from investors including Lightspeed, Atomico, AlbionVC, Hitachi Ventures, and Allianz. The company serves over 2,600 customers including Boohoo Group, Fever-Tree, Silverstone Circuit, and Newcastle United FC.

tem facilitated over 2 TWh of energy transactions in 2025 (equivalent to powering Liverpool for a year) and has saved customers $35M in energy bills since launching its RED utility in November 2024. The platform processes 1.8 billion matches per second.