PwC Appoints Lynne Baber as Global Sustainability Leader

Mark Segal July 1, 2026

Professional services firm PwC has appointed Lynne Baber as its new Global Sustainability Leader, leading the firm’s global sustainability strategy and sustainability practice.

Baber will succeed Colm Kelly in the top sustainability role, following Kelly’s retirement from PwC after serving as Global Sustainability Leader since 2020.

Baber takes on her new role after more than 2 decades at PwC, joining the firm in 2003, and holding a series of senior ESG and sustainability-focused roles, including leading PwC’s UK Sustainability practice since 2022, and serving as Global Sustainability Deputy Leader since early 2025.

In a post announcing the appointment, Baber said:

“Sustainability is increasingly connected to strategy, risk, operations, technology, supply chains, capital allocation and trust.

“I’ll be focused on supporting our clients as they navigate this evolving agenda, while also advancing PwC’s own sustainability actions and commitments.”

Mark founded ESG Today following a 20 year career in investment management and research. Prior to founding ESG Today, Mark worked at Delaney Capital Management (DCM) in Toronto, Canada, most recently as the firm’s head of U.S. equities. While at DCM, Mark was part of the firm’s ESG team, responsible for evaluating and tracking the sustainability factors impacting portfolio companies, and assessing the suitability of companies for portfolio inclusion. Mark also spent several years in the sell-side research industry, covering the technology and services sectors. Mark holds an MBA from Columbia University in New York, a BBA from the Schulich School of Business at York University in Toronto, and is a CFA charterholder.