Jealous, who has been at the helm since 2023, has faced significant criticism from staff members. Concerns were expressed in a letter sent to the Sierra Club's board, underscoring a lack of strategic direction under his leadership, particularly concerning the ongoing political challenges posed by the Trump administration. More than 100 employees indicated they felt abandoned without a clear path to counteract the rollback of established environmental protections. They further expressed anxiety over Jealous's ability to maintain relationships with key funders.

In light of these challenges, Loren Blackford has been appointed as interim executive director, stepping in as Jealous takes leave. The specifics around Jealous's leave have not been disclosed, and he has not publicly commented on the matter. Meanwhile, the Sierra Club declined to elaborate on any personnel issues, maintaining a stance of confidentiality regarding internal matters.

The organization, founded 132 years ago, is now navigating a turbulent phase that could redefine its direction and address internal grievances as well as external pressures from changing political climates.