Seplat Energy Plc has unveiled a major leadership succession plan, appointing prominent investor and businessman Tony Elumelu as chairman-designate and naming industry veteran Effiong Okon as its next chief executive officer, as the indigenous energy company positions itself for the next phase of growth.
The dual-listed oil and gas producer announced on Tuesday that Elumelu will assume the role of chairman on January 1, 2027, succeeding Udoma Udo Udoma, who is scheduled to retire from the board on December 31, 2026.
The company also disclosed that Okon will become chief executive officer effective August 1, 2026, replacing Roger Brown, who will retire after steering the company through a transformative period marked by strategic acquisitions and operational expansion.
The appointments represent one of the most significant leadership transitions in Nigeria’s energy sector in recent years and signal Seplat’s intention to maintain continuity while accelerating execution of its long-term growth agenda.
In a regulatory filing, the company said the succession plan would support delivery of its 2030 strategic roadmap and help advance key projects across its portfolio.
Elumelu’s appointment follows his growing involvement in the company after Heirs Energies acquired a 20.1 per cent stake previously held by Maurel & Prom in a transaction valued at about $500 million. He joined Seplat’s board earlier this year following the completion of the deal.
Widely regarded as one of Africa’s most influential investors, Elumelu chairs United Bank for Africa and Transnational Corporation Plc. Through Heirs Holdings, he has built investments spanning banking, power, oil and gas, healthcare, hospitality, technology and financial services.
His elevation to the chairmanship underscores a broader trend within Nigeria’s energy industry, where indigenous investors are taking greater control of strategic hydrocarbon assets as international oil companies continue to rationalise their onshore portfolios.
For Seplat, the move could strengthen investor confidence given Elumelu’s track record in corporate governance, capital mobilisation and long-term value creation. It also aligns with the company’s ambition to evolve into a leading integrated energy business with a stronger gas footprint.
Meanwhile, the choice of Okon as CEO points to continuity in operational leadership.
A petroleum engineer with more than 35 years of international experience, Okon joined Seplat in 2018 as operations director before advancing to become energy director and later managing director of the ANOH Gas Processing Company.
Prior to joining Seplat, he spent decades with Shell, holding senior positions across Africa, Europe, the Middle East and the United States. He also served as general manager of Shell’s deepwater production business in Nigeria, overseeing major offshore assets.
His appointment comes at a critical period for Seplat, which is integrating major assets acquired through the purchase of Mobil Producing Nigeria Unlimited in 2024 while pursuing ambitious gas development projects intended to boost domestic energy supply and earnings diversification.
Under Brown’s leadership, Seplat completed several landmark transactions, including the acquisition of Eland Oil & Gas in 2019, its transformational ExxonMobil asset deal in 2024 and the consolidation of its position as Nigeria’s leading listed indigenous energy producer.
Analysts are likely to view the dual appointments as a carefully managed succession strategy that combines board-level influence from one of Africa’s most prominent investors with operational continuity from a seasoned industry insider. As Seplat advances its 2030 roadmap, the leadership transition is expected to be closely watched by investors seeking signals on growth execution, capital allocation and the company’s expanding role in Nigeria’s evolving energy landscape.