Halcyon

Halcyon closed a $100 million Series C round in November 2024 at a $1 billion valuation, reaching unicorn status roughly three years after its 2021 founding (Halcyon). The round brought total funding to $190 million, led by Evolution Equity Partners with Bain Capital Ventures and ServiceNow Ventures participating (Bloomberg). That is a fast capital trajectory for a security vendor at this stage, and it typically tracks with headcount growth: a candidate weighing an early-stage security startup against an established vendor can read the funding pace as a rough proxy for how quickly the open-roles list is likely to expand over the next year.

Not right now. Halcyon has no internship or graduate roles listed today; new postings appear here as the firm opens them.

Applications to Halcyon go through the firm's own careers site, one application per posting, each expecting a CV and cover letter written for that role.