Seplat Energy Plc has appointed Effiong Okon as Chief Executive Officer, effective from August 1, 2026, while Tony Elumelu will become Chairman from January 1, 2027.
Seplat announced the appointments in a corporate filing submitted to the Nigerian Exchange Limited (NGX).
It said the leadership changes were aimed at supporting growth ambitions while ensuring continuity in strategy and corporate governance.
The company noted that the current CEO, Roger Brown, will retire on July 31, 2026, after 13 years with the company.
Brown served six years as CEO after joining Seplat Energy as Chief Financial Officer in 2013.
Seplat Board also appointed Okon, Managing Director of ANOH Gas Processing Company (AGPC), as Brown’s successor.
Okon has more than 35 years of experience in the global energy industry.
He joined Seplat Energy in 2018 as Operations Director before serving as Director of New Energy.
Most recently, he led the ANOH Gas Processing Project to achieve first gas production in January 2026.
Before joining Seplat Energy, Okon spent more than 26 years with Royal Dutch Shell.
He held several senior operational and technical positions across Africa, Europe, the Middle East and the United States.
The company also announced that the chairman, Udoma Udo Udoma, will retire on December 31, 2026.
Seplat shareholders approve N113.78 dividend for 2025
Udoma joined the Board in 2023 and became Independent Chairman in 2024.
He oversaw the successful integration of MPNU and development of Seplat Energy’s 2030 strategic roadmap.
To succeed him, the Board elected Elumelu, the Founder and Chairman of Heirs Holdings.
Elumelu joined Seplat Energy’s Board in January 2026.
His investment company, Heirs Holdings, holds a 20.07 per cent stake in Seplat Energy.
Elumelu said he was honoured to succeed Udoma as chairman in January 2027.
He said he looked forward to leading the Board through Seplat Energy’s next phase of growth.
“I firmly believe indigenous resources are critical to the economic transformation of Nigeria and Africa,” the UBA boss stated.
Elumelu also congratulated Okon on his appointment as Chief Executive Officer.
“His deep industry experience gives me confidence that Seplat Energy is well positioned for its next chapter of growth,” he added.
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