Open To Work
Oyo Ephraim
Zenith Bank PLC
Work Preference
Overview
Enterprise Architecture and Technology Governance Leader with over 16 years of experience in enterprise platforms and technology landscapes, helping design, secure, govern, and optimize ecosystems that enable business growth, operational resilience, regulatory compliance, and digital transformation.
15+
Years of experience
20+
Certification
02+
Languages
Work History
07.2023 - Current3 Years 3 Months
Head, Enterprise Architecture
Zenith Bank PLC | Lagos
- Direct enterprise architecture strategy in response to business priorities, and regulatory context, and help Executive Management understand implications, options, and trade-offs across applications, data, infrastructure, and operations.
- Lead enterprise architecture governance by conducting over 30+ architecture reviews monthly for technology projects, ensuring solution designs align with enterprise architecture principles, business capability requirements, security standards, target architectures, and regulatory obligations before implementation.
- Providing oversight into architecture of more than 250+ applications, ensuring business, application, data, and technology architecture consistently supports the bank's objectives, regulatory compliance, and transformation priorities, enabling faster executive decision-making, improved technology standardization, and a more resilient enterprise technology landscape.
- Develop and enforce standardized architectural practices based on Enterprise Architecture principles to prevent compliance drifts, reduce security vulnerabilities, and ensure adherence to established baselines.
- Support evolution of bank wide enterprise architecture operating models, including maturity assessment and implementation road maps as part of broader transformational programmes.
- Partner with the Information Security team to lead the bank's bi-annual enterprise technology risk assessment programme across more than 250+ enterprise applications and supporting infrastructure, identifying unsupported, end-of-life, and vulnerable technologies.
- Work with technology and business owners on the decommissioning of legacy technology assets through structured governance processes, reducing operational risk, technical debt, and technology costs.
- Assess and manage technology-related operational risks, including process failures, technology dependencies, concentration risks, and resilience across critical business services.
- Conduct technology due diligence for foreign
01.2019 - 06.20234 Years 5 Months
IT Auditor (Team Lead, Digital Channels Audit)
Zenith Bank PLC | Lagos
- Responsible for providing continuous control assurance on risk, compliance, control and governance of all open banking integration, data exchange, and partnerships with Mobile Money organizations.
- Recommended adaptive, preventive, corrective controls, and process improvement on all e-Channels, e-Platform, Payment gateway implementation etc. to identify potential threats and vulnerabilities for business processes, ensure appropriate controls are in place, and supporting capabilities to assist in the evaluation of enterprise risk.
- Participated in change management control testing - User's Acceptance Test and System Integration Test, carried out on new service offering introduced on various e-Channels and Payment gateway to ensure prompt resolution of all open risk issues identified and follow up on resolution before deployment to production.
- Carried out periodic audit exercise and identify application controls deficiencies and non-conformity of regulatory requirement on various electronic channels application.
- Led, provided guidance, and identify modus operandi of fraudulent incidents, and system glitch on all electronic channels and recommend effective control measures to mitigate the risk.
- Developed control policy framework in line with CBN (regulatory) circulars, guidelines, and policy to ensure the bank is positioned in a balanced approach both to regulatory and customers' business growth.
- Reviewed fraud rules on Anti-fraud solutions to monitor on all e-channels
- Responsible for recovery of unrecognized income by carrying out monthly re-computation of the following: Accrued interest on customers current and savings account, accrued interest on customers' loan account, interest expense related to interbank and interest income on placements with other banks.
- Reviewed business justification, product/vendor selection and pricing of IT project/procurement.
12.2017 - 12.20181 Year
Treasury Operations
Zenith Bank Plc | Lagos
- Responsible for the review, disbursement, and liquidation of Public Sector, Co-operate sector, and Retail term loans, Short Term Facilities (STFs), Leases, High Net-worth Individuals' facilities (HNI's), and other Risk Asset Instruments.
- Responsible for management of fixed term securities and Intervention products i.e., Fixed Deposits (FCY & LCY), Collateralized Deposits (CDs), commercial papers (CPs), Treasury Bills (TBs), Intervention Funds (Excess crude funds from states government), Commercial Agriculture Credit Scheme (CACs), FGN Bailout to States, Agri-Business Small and Medium Enterprises Investment Scheme (AGSMEIS), Real Sector Support Facilities (RSSF) et.al
- Reviewed and disbursed of off-balance sheets credit products i.e., Advance Payment Guarantees (APGs), Performance Bonds (PBs), Bid (Tender) Bonds etc.
- Responsible for preparation of Weekly/Monthly Report on On-lending Facility Position.
06.2011 - 12.20176 Years 6 Months
Senior Executive Assistance
Zenith Bank PLC | Lagos
- Responsible for branch treasury operations which covered timely re-pricing, liquidation, and rollover of branch's customers fixed term securities products.
- Fixed Asset register maintenance which involves recording acquisitions, disposals, monthly depreciation, and working closely with property and administration department in tracking branch's project costs to fixed asset account.
- Prepared branch monthly income statements by collecting data, analyzing and investigating variances.
- Handled and resolved reconciliation of ATM, fund transfer departmental accounts, and other general ledgers (GLs) at the branch.
- Reported of key risk indicators affecting the bank's processes at the branch level to the risk management team.
- Handled monthly reconciliation and rendition of the branch's withholding tax remittance on Interest deposit to FIRS and LIRS.
- Responsible for processing Import duty and NXP remittance to the Nigerian Customs.
- Issued and confirmed manager cheques to customers and processed outward clearing cheques to various banks.
- Processed local money transfer, intra and interbank transfer.
- Processed inward clearing cheques from other banks.
- Printed customers' Statement of activities.
Education
M.Sc. | Economics
University of Lagos | 01.2019
University of Lagos
01.2019
B.Sc. | Economics
University of Calabar | 01.2008
University of Calabar
01.2008
Second class (Upper Division)
Skills
Certification
- Certified Enterprise Architect (Black Belt) FEAC Institute 2026
- Certificate of Cloud Audit Knowledge (CCAK), ISACA 2024
- McKinsey Forward Program Alumnus 2024
- Banking Industry Architecture Network (BIAN) Certified Architect 2024
- Member, Chief Architect Forum (CAF) – Emerging Practice 2024
- Control Objective for Information Technology (COBIT 2019), ISACA 2023
- Certified Enterprise Architecture Practitioner, (TOGAF 10), The Open Group 2023
- Certified Information Systems Security Professional (CISSP), ISC2 2023
- Certified Cloud Security Professional, (CCSP), ISC2 2023
- Certified Information Security Manager (CISM), ISACA 2022
- Certified Information Systems Auditor (CISA), ISACA 2022
- Certified Data Privacy Solutions Engineer (CDPSE), ISACA 2021
- PECB Certified ISO 22301(Business Continuity Management) Lead Auditor 2021
- Member, Chartered Institute of Taxation of Nigeria (CITN) 2018
- Member, Nigerian Economic Society (NES) 2017
- Member, Institute of Chartered Accountants of Nigeria (ICAN) 2016
Affiliations
Treasurer, ISC2 Nigeria Chapter|2025 – Present
Accomplishments
- Reduced technology operational costs in 2025/2026 by over 30% through application and infrastructure rationalisation, decommissioning of obsolete assets, and renegotiation of vendor contracts together with the procurement Team.
- Contributed to reducing audit observations and control deficiencies by more than 80% through strengthened governance, risk management, and control frameworks.
- Significantly reduced technology risk exposure through the implementation of enterprise security controls.
- Improved technology platform availability from approximately 60% to over 98% through architecture redesign, infrastructure modernization, and collaboration with technology domain experts.
- Delivered and governed strategic technology initiatives involving core banking platforms, treasury systems, payment solutions, cloud services, enterprise applications, and cybersecurity capabilities.
- Led compliance initiatives aligned with IT Standards framework, Information Security, data privacy, business continuity, and audit.
Languages
English: Native -Professional Working Proficiency
French: Elementary Proficiency (CEFR A1), currently undertaking French training at Alliance Francaise
Projects
- Zenith Bank Digital Transformation Project (2021/2022), Guided Information system controls implemented on Zenith Bank's Calypso Treasury Application, Guided information system controls implemented on Oracle Flex-cube core banking Application, Guided security controls and design of the new Zenith Mobile Application, Participated in the Zenith Bank implementation of the Pan African payment and settlement system (PAPSS), Participated in the implementation of Zenith Integrated Virtual Assistant- BOTs, Participated in the implementation of Mastercard Payments Gateway Services Transaction Risk Manager
- Inspection of Information Technology Department of Foreign Branches, Participated in inspection audit of Information System Department of international branches (Zenith Bank Gambia, and Zenith Bank Sierra Leone)
Training
- The Chartered Institute of Taxation of Nigeria Mandatory Continuing Training Programs for Tax Professionals (MCPE)
- The Institute of Chartered Accountants of Nigeria Mandatory Continuing Training Programs for Professional Accountants (MCPE).
- Monthly attendee of ISACA professional development CPE webinars on Audit, digital trust, governance, risk management, COBIT, AI governance, cloud governance, data privacy, DevSecOps, and technology assurance.
- Monthly ISC2 Continuing Professional Education (CPE) webinars and technical seminars covering cybersecurity strategy, cloud security, AI security, Zero Trust Architecture, threat intelligence, identity and access management, and emerging cyber risks.
Timeline
Head, Enterprise Architecture
Zenith Bank PLC
07.2023 - CurrentRead more
IT Auditor (Team Lead, Digital Channels Audit)
Zenith Bank PLC
01.2019 - 06.2023Read more
Treasury Operations
Zenith Bank Plc
12.2017 - 12.2018Read more
Senior Executive Assistance
Zenith Bank PLC
06.2011 - 12.2017Read more
University of Lagos - M.Sc., Economics
Read more
University of Calabar - B.Sc., Economics
Read more