Rhian Kelly
Ivanka Mamic
TOP 250 WOMEN
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Rhian Kelly
Title: Chief Sustainability Officer Company: SSE Industry: Energy
Rhian Kelly joined SSE in November 2025, bringing more than 22 years of business and environmental strategy experience, including eight years leading sustainability at National Grid. Beginning her career at the EU Chamber of Commerce in China, she brings an international perspective to SSE’ s commitment to operational net zero by 2050 – steering one of the UK’ s leading renewable energy companies through a pivotal moment in the energy transition.
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Ivanka Mamic
Title: Global Head of Government Relations & Chief Sustainability Officer
Company: Rolls-Royce Industry: Aerospace & Defence
Ivanka Mamic leads climate strategy, policy engagement and stakeholder advocacy at Rolls-Royce, drawing on deep experience as Chief Sustainability Officer at bp and a senior sustainability leader at Target. Her background spans decarbonisation, responsible sourcing and governance across energy, retail and advanced engineering.
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