Experienced professionals, close to the work.

Principal Partner

Dr. Alexander Olufemi Johnson

FCA FCTI CFAN MBA

CFAN means Certified Forensic Accountant of Nigeria.

Alexander began his career with the Nigerian Enterprises Promotion Board, followed by the Central Bank of Nigeria. He later held senior accounting and management positions at Bullion Building Society, BFB Petroleum and The Bazaar Farms & Stores Ltd, and has served on the boards of private companies.

Managing Partner

Mr. Samuel Olasunkanmi Ajala, ACA

ACTI

Samuel became an AATWA member in 2012 and completed a degree in Accounting in 2015. He has experience across telecommunications, transportation and professional practice, with a focus on statutory audit, tax, accounting, internal control and business advisory.

Assistant Manager, Tax and Regulatory Services

Mr. Hammed Olayiwola Shoyombo

B.Sc. Economics

Hammed’s work spans tax advisory, compliance, tax strategy and relevant regulatory requirements. His professional experience also includes audit and investigation assignments.

Legal Practitioner

Ms. Sarah I. Lawal, Esq.

AICMC, ABR

Sarah holds an LLB from BPP University Manchester and an LLM in Business Law from the University of Hull, and completed the Legal Practice Course at BPP University. Her experience includes litigation, alternative dispute resolution, commercial law and taxation law. She works within Alexander Johnson & Co’s legal department.

Engagement Partner

Mr. Bello Usman Haruna

FCA, ACTI

Bello became an Associate Accounting Technician in 2012 and completed a degree in Business Administration in 2014. His experience spans telecommunications, healthcare and construction, with work across statutory audit, tax audit, accounting and business advisory.

Assistant Audit Manager

Mr. Ibrahim Alaba Jimoh, ACA

B.Sc. Accounting

Ibrahim supports the assessment of financial operations, internal controls and regulatory compliance. He also coordinates audit staff and works with senior management during engagements.

Accounting Professional

Ms. Moyefolaoluwa Esther Adeyemi, AAT, ACA

Moyefolaoluwa Esther Adeyemi became a member of AATWA in 2023 and holds a bachelor’s degree in Accounting from Obafemi Awolowo University, Ile-Ife. She is also an Associate Chartered Accountant and is building expertise across audit, taxation, accounting and business advisory.

Accounting Professional

Mr. Hassan Temitope Aberuagba, AAT, ACA

Hassan Temitope Aberuagba completed the ATSWA programme in 2024 and qualified as an ICAN professional in 2025. He is gaining practical experience in accounting and audit while continuing to develop his technical capability.