Castilla Impact, accessed August 26, 2026: “Isaiah most recently served as a Managing Director in the Washington, DC office of Arabella Advisors from 2020-2025.” That is his current public bio.
Arabella’s GlobeNewswire release of February 10, 2022, is written as a join announcement: the firm is “thrilled to announce that Isaiah Castilla has joined the firm as a Managing Director based in Washington, DC,” and that he “comes to Arabella following four years as General Counsel at Democracy Fund.” Those two date stories do not match. This site records both. It does not collapse 2020 into 2022, or 2022 into 2020. No later Arabella Form 10-K or comparable primary was located that independently prints a start month. LinkedIn-style indexes are not used here as Fact.