Strategic Account Manager

Siena is the Agent of Record for consumer brands. One agent that owns the entire customer journey, running on a shared intelligence layer no point tool can replicate. Siena is a small, fully distributed, global team. We hire athletes. Everyone here owns real outcomes, defaults to writing over meetings, communicates with directness, and acts the moment they see something worth acting on. The Role: You own the commercial relationship for Siena's highest-value brands: renewals, expansion, executive trust, and knowing your accounts better than anyone. A deployment strategist owns product outcomes for the same accounts — together you're the Siena pod. You hold your accounts to specific, measurable commercial outcomes: net dollar retention, expansion, and the strength of the executive relationship. You own Growth and Strategic segment accounts - not the full customer book - and work at the intersection of customer, sales, and your deployment strategist. You'll lead commercial reviews, executive account mapping, and account planning, and run in-person workshops, account visits, and QBRs with your accounts. Expect moderate travel. You will build concrete account plans and monitor account health, maintaining executive relationships and renewal-chains. This is a remote role with a London base, global team, and strong emphasis on AI fluency and cross-functional collaboration.