Sierra sits second on Employbl's open-headcount leaderboard with 129 active roles. Their $950M Series E closed in May 2026 and immediately triggered one of the most aggressive hiring pushes in San Francisco. Here is what Sierra actually does and what it means to join the company at this stage.
What does Sierra do and why is it hiring so aggressively?
Sierra builds conversational AI agents for enterprise customer operations. Unlike chatbots that deflect tickets, Sierra agents are designed to actually resolve issues by integrating directly with the systems of record behind the customer experience. Enterprises handling millions of customer interactions monthly use Sierra to maintain quality while scaling volume.
The $950M round reflects the market belief that AI-driven customer operations is a category, not a feature. With that capital Sierra is building out every function simultaneously: enterprise sales, customer success, engineering, and platform infrastructure. The 129 roles split roughly 40% GTM, 40% engineering, 20% operations.
For context on Sierra within the broader AI software hiring boom see our industry analysis. And our Q2 2026 fintech funding roundup shows what other well-funded companies hiring alongside Sierra look like.
