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Gregory Yianni

Associate Director - Sustainability Services London 

Gregory joined JTC in 2022 with a significant background in sustainability.

His current role focusses on expanding the Environmental, Social and Governance (ESG) services offering within JTC to support new and existing clients with their own ESG strategy formation and policy implementation as well as navigating ESG reporting requirements.

Previously at PwC in London, Gregory specialised in working with private equity and financial services clients on a variety of ESG / sustainability projects linked with investments and portfolios within multiple sectors. Some of these projects included designing and delivering training to senior leadership teams in key areas of climate risk, ESG reporting landscape and future impact of TCFD. He is also a ICAEW Chartered Accountant with extensive experience in external audit and ESG assurance of a range of companies including in the renewables and utilities sector.


  • ACA
  • CFA Institute - Certificate in ESG Investing
  • BSc (Hons)

In Their Spare Time

Outside spending time with friends and family, Gregory is an enthusiast in travel and sports particularly football, tennis and recently started playing padel. Particular travelling highlights include seeing orangutans in the Borneo rainforest. In 2023, Gregory took an extraordinary journey to Antarctica to explore some of the world’s pristine areas, with a particular interest in seeing with his own eyes the growing impact of climate change and environmental degradation.


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