Maintenance Tech

The Maintenance Tech is a minor character in Rise of the Tomb Raider.

He sells weapons and equipment to Lara Croft via the supply shack.

Story
Upon finding the area in Siberia they needed to search for the Divine Source, Trinity dispatched their forces, bringing the maintenance tech with them to repair weapons and equipment. However he quickly began to regret working for them, seeing how they were torturing and killing the Remnants in search of divine power, which he thought to be insane.

He had been stockpiling equipment to leave when Lara Croft stumbled upon him.

He persuaded Lara that he was on her side, and that he wanted to get as far away from Trinity as possible. He even offered to sell her gear in exchange for gold since he'd need untraceable currency in order to stop Trinity from tracking him.

Trivia

 * After buying all the items from the Supply Shack, he will remain there.