Our People
People make the difference. Meet the team driving engineering excellence.
Leadership & Core Team
A4 Associates is managed by a group of resourceful, highly qualified Nigerian professionals. Our team includes COREN-registered engineers, registered architects, surveyors and IT specialists who bring decades of combined experience to every assignment.
Executive Management
Ibrahim Abu
Managing ConsultantLeads A4 Associates since 2010, bringing prior experience as Chief Engineer at the Bureau of Public Procurement and over a decade in consulting and contracting. Specialises in civil engineering, project preparation and management, and public procurement reform.
MBA (Warwick Business School, 2009); BEng Civil Engineering (Ahmadu Bello University, 1989)
Fellow, Nigerian Society of Engineers; Registered COREN; Member ASCE / IHT (UK) / PPAN
Bello Aminu
Engagement DirectorJoined A4 Associates as Engagement Director in 2020 after running Capital Projects Consultants and co-founding Network Facility Management Services. Focuses on architecture, project planning, facilities management and construction management.
BSc Traditional Architecture (1997), MSc Architecture (1989), BSc Architecture (1987) — Ahmadu Bello University
Registered ARCON; Member NIA / NIM / IMC / ICIArb / IFMA / ISFE / CIB / WOBO
Aminu M. Sambo
Executive ConsultantWith A4 Associates since the firm’s founding in 2002. Specialises in civil and water resources engineering, project preparation and management, and monitoring & evaluation.
BEng Civil & Water Resources Engineering (University of Maiduguri, 1996)
Member NSE / COREN; Associate ASCE; Member CIPD / INTRAC / SMEAN
Dayyabu Mamman
Executive ConsultantSpent 35 years at the Federal Ministry of Works, rising to Director (Highways) and supervising the 21 federal road projects later inspected under NNPC–FRITCS, before joining A4 Associates in 2022.
BEng Civil Engineering (Ahmadu Bello University, 1983)
Fellow, Nigerian Society of Engineers; Member NIHE / NICE / COREN
Principal Consultants
Pius Oklo
Principal Consultant — CivilOver 30 years of civil and structural engineering and project management experience, including as Chief Engineer at Eta Associates before joining A4 Associates in 2003.
BEng Civil Engineering (Bayero University Kano, 1985)
Member NSE / COREN
Nureni Adedayo Akewusola
Principal Consultant — CivilCivil and highway engineer with project management experience including roles as Project Manager and Chief Resident Engineer prior to joining A4 Associates in 2019.
PGDip Civil Engineering (Bayero University, 2013); BEng Civil Engineering (FUTA Akure, 2003)
Member NSE / COREN
Muhammad Sa'idu Belel
Principal Consultant — CivilCivil and infrastructural engineer who served as Chief Resident Engineer on the FCDA Inner Southern Expressway extension before joining A4 Associates in 2020.
BEng Civil & Water Resources Engineering (University of Maiduguri, 1990)
Member NSE / COREN
Isaac Isa Oguche
Principal Consultant — MaterialsOver 30 years in geotechnical and materials engineering. With A4 Associates since 2002, having previously headed materials quality control at Bilwadams Civil.
MSc Geotechnics (Federal University of Technology Lokoja, 2020); BSc Geology (Ahmadu Bello University, 1990)
Member NMGS / NAH; Registered Geoscientist, COMEG
Isah Muhammad Isah
Chief Structural EngineerCivil engineer and project manager who served as Chief Resident Engineer on the KADA 2008 sporting facilities programme. With A4 Associates since 2007.
PGDip Management Science (Kaduna Polytechnic, 2009); BEng Civil Engineering (Bayero University, 1998)
Member NSE / NICE / COREN / IMC
Senior Consultants & Specialists
Mumuni Alhassan
Senior Consultant — ArchitectArchitecture and project management specialist who ran his own practice for over a decade before joining A4 Associates in 2022.
MSc Architecture (1990), BSc Architecture (1988) — Ahmadu Bello University
Member NIA / ARCON / NIM; Fellow NIMC; Certified Management Consultant
Itam George Ikpi
Senior Consultant — CivilDual-qualified in civil and mechanical engineering, based in A4 Associates’ Calabar office since 2012, with earlier project coordination experience on the Afri-Projects Consortium.
BEng Civil Engineering (University of Agriculture Makurdi, 2001); HND Mechanical (Calabar Polytechnic, 1981)
Member NSE / NICE / COREN
Bukoye Tajudeen Adebisi
Senior Consultant — CivilOver 20 years in water resources engineering and 8+ years leading monitoring and evaluation on MDG-funded infrastructure programmes.
MSc Hydrology and Water Resources (UNESCO-IHE Delft, 2017); BEng Civil Engineering (Ahmadu Bello University, 1998)
Member NSE / COREN / Institute of Appraisers / SMEAN / European Evaluation Society
Chizaram Prince Azubuike
Associate Consultant — Technology & Support (AI)Heads Technology and Support (AI Department), having served as IAM Admin Engineer and Project Data Analyst on the NNPC–FRITCS reconstruction of 21 federal roads (1,261km), building Power BI dashboards that automated progress tracking and risk management across the $1.3bn programme.
MBA Entrepreneurship & Innovation (in progress, Miva Open University, exp. 2026); Cybersecurity Engineering Certification (INGRYD Academy, 2025); HND Civil Engineering (Federal Polytechnic Bida, 2020)
Member, Nigerian Society of Engineers; PMP Training; ALX AI Career Essentials
Alhassan Enejo Christian
Senior Consultant — Survey & Geo-Informatics18 years in engineering surveying, route survey and cadastral survey, with A4 Associates since 2002.
PDS Surveying & Geo-Informatics (Kaduna Polytechnic, 2010); HND Surveying (Federal Polytechnic Bauchi, 2001)
Registered Surveyor, SURCON; Member, Nigerian Institution of Surveyors
Aliyu Usman
Senior Consultant — Highway & TransportationHighway and transportation engineer with a research focus on sustainable pavement materials, with A4 Associates since 2023.
PhD Civil Engineering (Universiti Teknologi PETRONAS, 2022); MSc Civil Engineering (Ahmadu Bello University, 2016); BEng Civil Engineering (Bayero University Kano, 2009)
Member NSE / COREN / NICE / NIHE
Mukhtar Ojutiku Oluwafemi
Senior Consultant — CivilStructural engineer with A4 Associates since 2002, holding a current COREN practising licence.
MEng Civil Engineering (Federal University of Technology Minna, 2023); BEng Civil Engineering (FUTECH Minna, 2016)
Registered Engineer, COREN (2021); Member NSE (2021); Certified CAPM (2020)
Nurudeen Ibrahim Suleiman
Senior Consultant — IT25+ years in IT and networking, including as MD/CTO of Tekpulse Limited, leading A4 Associates’ technology and data infrastructure since 2020.
Advanced Cyber Security Program (Stanford University, 2015); HND Electrical/Electronics (Kaduna Polytechnic, 1990)
Resource Member, AfriNIC; Corporate Member, ISPAN / CPAN / NG-NOG
Habib Salihu
Procurement & Logistics ManagerWorld Bank–certified in public and e-procurement, managing procurement, supply chain and executive administration for A4 Associates since 2021.
MBA (in view, University of Abuja Business School); BSc Business Administration (Ahmadu Bello University, 2015)
Member, PPAN (2025); Member, NIM (2019)
Join Our Team
We are always looking for talented professionals who share our commitment to integrity and excellence.
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