Faultline recruited Newter and Gregor the Snail after saving them from being arrested by a hero. After they met her conditions. This 'founding' was roughly three years before the story started.
The group pulled a job on the North American Tinkerblack market and infiltrated a high-security asylum seeking information on the Dragonslayers. After defeating a team from the BostonProtectorate, they recruited Labyrinth, an inmate who had been recently transferred there.
↑Tattletale nodded, "Faultline's crew does anything short of murder. You can say her personality sucks, you can say her powers suck, but I'll admit she's very good at finding hidden strengths in the people that work for her. See those two guys? When it came to powers, they got a bad roll of the dice. Became freaks that couldn't hope to pass in normal society, wound up homeless or living in the sewers. There's a story behind it, but they became a team, she made them effective, and they've only messed up one or two jobs so far."
"Gotcha," I said, "Impressive."
"Keep in mind, though, we haven't screwed up any. We're 100%."
"They've done something like three times as many jobs as us," Regent pointed out. - Hive 5.1
↑ 3.03.1"Just saying my group won't be getting directly involved in this without a reason," Faultline spoke, "We won't be going after the ABB unless they get in my way or someone pays my rates. It's the only workable policy when you're a cape for hire. And just so we're clear, if it's the ABB paying, my team's going to be on the other side of things." - Hive 5.1
↑The nature of Faultline’s meeting with her ‘crew’ is essentially what happened in canon. - Snippets: Before Worm
↑"Uh, yeah," Brian looked a touch embarrassed, he rubbed the back of his neck, "It didn't go well. We tried with Spitfire, and she got scared off before we even got to the job offer. Our fault, for bringing Rachel along that time."
"And then she got recruited by someone else," Alec added.
"Yeah," Brian shrugged, "She got snagged by Faultline before we got a second chance. - Insinuation 2.6