Peter Roberts has joined from H2 Green Steel, a developer of hydrogen-powered steel plants backed by Just Climate, GIC and Hy24.
Chandra Eastwell is now a director of sustainable investing at QIA, a sovereign wealth fund that has been making inroads into sustainability in recent years.
Alison Humphrey launched Arna last month to advise climate funds and early-stage companies on raising capital.
Nathalie Wallace joins the firm, which is active in private equity, real estate and infrastructure debt.
Kristen Weldon previously held senior positions at BlackRock, Blackstone and Partners Capital.
Daniel Perroud, former global head of business development for Schroders' impact business BlueOrchard, has joined Blue Earth.
Neil Brown joined Actis in 2013 and led ‘$10bn in capital raisings during his tenure’.
Matthias Hansch will take charge of the firm's value creation plans, while Alison Prout has joined the ESG team.
Nathan Medlock has joined the firm in London after 10 years at Zouk Capital.
Kathleen Bacon has joined the London manager after nearly 30 years at her previous firm.