Diego and his small team at Family Office articulate company-changing strategies and design resulting brand identities, user interfaces, spaces, packaging, and more. The firm's previous clients have described the work as “stronger and more business-savvy than any brand strategy work we have seen before.” He co-founded Terms-Eccles to host conversations at the intersections of finance and culture. Most recently, on the evening of Tax Day, Monday April 15, 2024, legendary financial writer James Grant, bestselling author Carrie Sun, infamous it-girl Cat Marnell, and the podcast duo behind The Ion Pack came together at Spring Place for a crowd of 130. Previously, he co-founded a company called Nation. Backed by Placeholder, M13, Slow, Circle, and Tribe Ventures, the company went on to build a handful of software products, in the end resulting in Vellum before the team disbanded. Before Nation, he was a Senior Designer at Waybridge (acq. Minehub).

He began his career as the youngest designer ever hired at the prolific brand transformation agency, COLLINS. He is the author of a 2018 book, The Dropout Manifesto.

He is @messybirkin on Instagram and X, and is reachable via email.