Josh Stark, a senior executive at the Ethereum Foundation, is stepping down from his role after five years. 

In a social media post, Stark said: “Working for Ethereum at the Ethereum Foundation has been a great honour. I’m proud to have worked with great people inside and outside of the EF, and proud of what our community has accomplished together.” 

A reason for Stark’s sudden and immediate departure was not provided. The Ethereum Foundation is a non-profit organization established in 2014 to support the Ethereum blockchain.  

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Stark joined the Foundation in 2019 to work with the special projects team and was later promoted to a leadership role where he worked alongside President Aya Miyaguchi and Ethereum founder Vitalik Buterin. 

His departure comes amid an ongoing transformation of the Ethereum Foundation. 

In addition to a major shake-up of the organization’s leadership last year, the group has redoubled its focus on scaling the Ethereum mainnet and supporting privacy and security. 

Stark is the second senior executive to leave the Foundation in recent months. Tomasz Stańczak stepped down as co-executive director at the end of February this year. 

Stark, who said he will stay on until the end of April, was best known for his communications role and was among the better-known public faces of the Ethereum Foundation. 

He also played a stewardship role for major efforts, including Ethereum’s switch to a proof-of-stake system, known as “The Merge,” as well as the Pectra upgrade.

In March of this year, Stark co-wrote an Ethereum Foundation blog post outlining Ethereum’s (CRYPTO: $ETH) updated scaling ambitions and relationship to the Layer 2 ecosystem. 

Stark also founded ETHGlobal, a leading organizer of Ethereum-focused hackathons, and L4, an early-stage venture studio. 

Ethereum is currently trading at $2,330 U.S.