The first contraction in a decade and a half of chief sustainability officer appointments at U.S. public companies is raising questions about whether corporate climate commitments are retreating or simply maturing. According to the latest survey from recruiter Weinreb Group, the number of CSOs at publicly listed U.S. firms fell by 10 percent to 193 as of July 1, down from 216 in 2025. It marks the first decline since the group began tracking the role 15 years ago. The drop is largely attributed to departing CSOs not being replaced, a trend that could be read as a symptom of what some observers call a “sustainability recession.”
The timing is hardly coincidental. The current U.S. administration has openly opposed climate-focused regulations, and earlier anti-ESG campaigns by Republican leaders have cooled the political temperature around corporate sustainability. Some companies, critics argue, created CSO titles for optics during the ESG boom of the early 2020s. With external pressure easing, those same firms now feel free to leave vacant roles unfilled. The Weinreb data suggests that the rapid growth phase that followed the 2010s has stalled, and the role itself is being re-evaluated.
Yet the headline decline may not tell the full story. Ellen Weinreb, the group’s founder, points to a more nuanced dynamic: CSOs are increasingly absorbing broader responsibilities, and in some cases “sustainability” has been dropped from job titles even as the function remains embedded in their work. In May, for instance, Tara Hemmer moved from CSO to chief operating officer at environmental services firm WM, retaining sustainability oversight within a more operational role. Weinreb argues this signals an intent to integrate sustainability into core business functions rather than a retreat.
That interpretation aligns with Trellis Group’s State of the Sustainability Profession in 2026 report, which surveyed over 500 sustainability professionals at companies with at least $1 billion in revenue. While the pace of hiring has slowed, most businesses continue to expand their sustainability teams. In 2024, 74 percent of companies increased headcount; this year, 50 percent still added staff, though 26 percent reduced it. The picture that emerges is not one of wholesale abandonment but of consolidation, as companies shift from symbolic appointments to operational integration.
For energy professionals and investors, the implications are significant. A decline in dedicated CSO roles does not necessarily mean a decline in sustainability activity. It may instead indicate that sustainability is becoming a distributed responsibility across operations, finance, and strategy functions. That could be a sign of maturity, but it also risks diluting accountability. The next few quarters will reveal whether this trend is a temporary adjustment or a deeper structural shift. Either way, the era of the high-profile, standalone CSO may be giving way to something less visible but potentially more durable.
Read the full report at Trellis Group.