Seplat Energy Plc is entering a new leadership era, with the board announcing on Monday that Engr. Effiong Okon will take over as chief executive officer on August 1, 2026, while billionaire investor Tony Elumelu will become chairman on January 1, 2027, replacing outgoing CEO Roger Brown and Chairman Senator Udoma Udo Udoma.
The phased transition caps a period of aggressive expansion for Nigeria’s leading indigenous energy firm and signals a deliberate handoff aimed at preserving strategic continuity as the company executes its 2030 Roadmap.
Brown will retire on July 31, 2026, after 13 years with Seplat, joining as CFO in 2013 and steering the company through its dual listing in 2014 before becoming CEO in August 2020. His tenure is defined by two landmark deals: the 2019 acquisition of Eland Oil and Gas and the transformational purchase of Mobil Producing Nigeria Unlimited in 2024, which cemented Seplat as one of Africa’s biggest independents.
Under Brown, Seplat built a reputation for financial discipline and shareholder returns, with Udoma noting the company “materially outperformed the sector” and that Brown’s legacy was sealed by the MPNU deal and the Roadmap 2030 strategy unveiled in 2025. Brown said the company is now synonymous with financial resilience and strong governance, and is positioned to support Nigeria’s growth targets.
His successor, Effiong Okon, is a Seplat insider with deep operational roots. He joined in 2018 as operations director, moved to director of new energy in July 2022 to drive gas and transition strategy, and in 2024 became managing director of ANOH Gas Processing Company, where he delivered first gas in January 2026.
Okon’s appointment points to Seplat’s pivot toward gas and energy transition. He oversaw the 300 MMscfd ANOH plant, an integrated joint venture with NGIC, and previously developed the company’s decarbonization roadmap for upstream operations. Before Seplat, he spent 26 years at Royal Dutch Shell across Africa, the US, Europe and the Middle East, including roles as VP of cost leadership in the Netherlands, GM of deepwater production in Nigeria, and deputy VP technical for Qatar’s North Field, the world’s largest gas field.
Okon said his immediate focus will be executing the 2030 Roadmap and developing a long-term plan to unlock the portfolio’s potential. With Seplat operating three gas plants at Oben, Sapele and ANOH, and supplying domestic power generation, the CEO pick reinforces gas as core to future growth.
The chairman transition is equally telling. Udoma, who joined the board in December 2023 and became independent chairman in April 2024, will retire on December 31, 2026 after overseeing MPNU integration and the 2030 plan. He will be succeeded by Tony Elumelu, who joined the board in January 2026 and controls Heirs Holdings, which owns 20.07% of Seplat.
Elumelu brings boardroom weight and capital markets influence. As founder of Heirs Holdings, UBA, and Transcorp, he has a multi-decade record of value creation across energy, power, banking and infrastructure. He framed his incoming role around indigenous resources, saying he firmly believes in their critical role in Nigeria and Africa’s economic transformation and that Seplat’s execution culture aligns with his values.
The timing is strategic. Seplat emerges from the MPNU acquisition with a larger upstream footprint, three export terminals including Qua Iboe and Bonny River Terminal, and two offshore NGL recovery plants. Integrating those assets while delivering on gas and maintaining production is now Okon’s task. Elumelu’s chairmanship, backed by a 20.07% stake, gives the board a principal shareholder with a track record of scaling African companies.
Investors get continuity with change. Okon is a known operator who built ANOH, and Elumelu is a known capital allocator. Brown leaves with the MPNU deal completed and the 2030 strategy set. Udoma exits after stabilizing governance post-acquisition.
The message from Seplat is that the next phase is about execution, not reinvention. The assets are in place. The strategy is written. The new leadership is tasked with converting scale into cash flow, and gas into power, while navigating Nigeria’s complex operating environment.
