Sparky is a short man with an average build in his mid-30s. He is a former railway worker who blasted away rocks with powerful explosives who earned his name from the arc welder he carried around to light fuses. Sparky joined a powder gang after the railway operations shut down. He did well in the group, making plenty of raw explosive traps for their use. However, that all ended when the 5th Engineering Company blew the Burham Mines. Sparky survived, but only barely. His hearing was almost entirely destroyed, and his mind was shaken pretty badly, resulting in a dramatically reduced hearing range, an inability to talk well, and stuttering a lot. He more than a little frazzled, often unable to think about what he's saying. Despite this, he's clear-headed enough to work with Phil and to recognize Frank, but not much else. He doesn't look like he'd be much of a threat in combat, but he is pretty handy with his arc welder and with his thrown explosives.
Sparky was, and is once again, Phil's companion. Phil tracked him down after the NCR shut down the railway operation and they went their separate ways.
Get Rid of Lingering Geckos: Phil and Sparky are tired of all the geckos creeping around the edges of Burham Springs, but don't want to waste time and ammo going after them themselves, so they will ask the Prisoner's help getting rid of them.
New Canaan Connection: Jeremiah wishes to enter into a trade agreement with Sparky, Phil and Frank. However, he is concerned that the trio at Burham Springs may fire at will on the New Canaanites if they approach, so he would like the Prisoner to negotiate on their behalf.
Completing Extinguish the Fires of Burham Springs will give the NCR an outpost in the northeast and allow Burham Springs to rebuild as a town, but consequently effectively ends the salvaging and livelihoods of Sparky, Phil and Frank.
The explosion upon blowing up the entrance to the mine is loud enough that it can be heard at Phil and Sparky's place as well as Frank's place. The trio will investigate and attack the Prisoner and any companions.
Sparky is a twitchy guy, but usually only responds to Phil or to very loud noises such as shouting right next to him or a shotgun blast near him, which can cause him to become extremely agitated and attack erratically at the source.