Harold Frost

Harold Frost was an employee of Garrahan Mining in Appalachia before 2102.

Background
Harold Frost was a service member in the U.S. Army's Research Corp and was part of the team that designed the original T-45 power armor, which was later developed by West Tek.

He was hired by Vivian Garrahan to develop her company's Excavator power armor. He ran into a couple of issues during development: durability of the chassis arms and its repurposed T-45 reactor. At advise of Vivian's son, he casted the parts in black titanium to increase durability. Later he advised Vivian to contract with Atomic Mining Services to obtain their patented Ultracite ore to power the armor. The Excavator power armor displayed no further issues, not suffering a single serious breakdown. He was still against Vivian's challenge to competitor Hornwright Industrial's Auto-Miner, in which his work publicly failed in a mining competition against the machine.

Appearances
Harold Frost is only mentioned in Fallout 76.