Meet our Group Chief Finance Officer, Cephalus Wariri
Cephalus Wariri is the Group Chief Financial Officer of Oilserv Group, responsible for the Group’s financial strategy, control, and stewardship across its pipeline, facilities, and EPCIC operations. He leads the Group’s Finance, overseeing financial control, business finance, treasury, and financial operations to support Oilserv’s continued growth as a leading indigenous energy infrastructure company.
Cephalus brings over two decades of experience spanning banking, energy, conglomerate strategy, and oilfield services to the role. He joined Oilserv as Chief of Staff to the Group Chief Executive Officer, where he played a central role in shaping the Group’s strategic direction and economic analysis, and in supporting executive decision-making across the organization’s Pan-African expansion.
Prior to Oilserv, Cephalus served as Assistant Chief of Staff to the Chairman at Heirs Holdings, where he led strategic planning, business economics, and tracking top-management execution across the group’s diverse portfolio. He has also held senior finance leadership positions including Chief Finance Officer at UPS Nigeria, Finance Controller at Nestoil Limited, and Chief Finance Officer at United Bank for Africa (UBA) in the Republic of Chad, in addition to earlier experience in financial reporting and performance improvement at Keystone Bank (formerly Bank PHB) and in assurance services at KPMG Nigeria.
A Fellow of the Institute of Chartered Accountants of Nigeria (FCA) and an Associate of the Chartered Institute of Taxation of Nigeria (ACTI), Cephalus holds an MSc Economics in Petroleum, Energy Economics and Finance from the University of Aberdeen Business School, which he completed as a Chevening Scholar. He also holds a Bachelor’s degree in Accounting from Delta State University, Nigeria, and is a published researcher on energy economics, with work examining gas commercialization models, carbon lock-in LNG strategy, tackling the oil curse through local content development, comparative perspectives in the role of national oil companies in shaping energy policy and development, and off-grid power solutions for the Nigerian energy sector.
With this breadth of experience across financial leadership, strategic planning, and energy sector economics, Cephalus continues to strengthen Oilserv’s financial governance as the Group delivers world-class engineering, procurement, construction and gas utilization solutions across Nigeria and Africa.