Onye Annabelle Rumuna
Commercial & Strategy Lead
Lagos
Summary
Business Document Expert with 8+ years of experience producing, evaluating, and refining high-quality business documents across strategy, finance, operations, and infrastructure environments. Proven mastery of Excel, PowerPoint, and Word to deliver consulting-grade analysis, executive presentations, dashboards, proposals, and reports. Brings strong business judgment, exceptional attention to detail, and a structured feedback mindset, with hands-on experience reviewing outputs for accuracy, clarity, and professional standards. Experienced working with AI-enabled workflows and data tools to test, critique, and continuously improve business deliverables in fast-paced, remote settings.
Overview
14
14
years of professional experience
4
4
Certifications
Work History
Chief Commercial Officer
The Rebuild Projects Limited
04.2023 - Current
- Launched Power BI dashboards for real-time tracking of sales, client engagement, and delivery KPIs across 11 active projects.
- Designed and maintained Excel-based financial models and SQL queries to analyse margin trends and resource allocation, reducing cost overruns by approximately 35%.
- Improved cash-flow predictability by 40% through pricing simulations, scenario testing, and structured investor reporting frameworks.
- Produced and reviewed executive PowerPoint decks and Word-based reports used for investor updates, internal decision-making, and project governance.
- Collaborated with finance, engineering, and customer success teams to refine product-market fit for diaspora clients, contributing to a 60% increase in repeat business.
- Evaluated AI-assisted drafts of reports, dashboards, and presentations, providing structured feedback to improve clarity, accuracy, and business relevance.
Senior Commercial Manager/ Co-Founder
RAFTERS Properties Limited
09.2019 - 04.2023
- Built and scaled real estate tech operations; led capital raise of $150,000 under 4 months.
- Built and stress-tested Excel models for cost optimisation, pricing strategy, and performance tracking, improving margin visibility and decision accuracy.
- Developed PowerPoint pitch decks and strategy presentations used in fundraising and stakeholder engagements, contributing to successful capital raises within four months.
- Coordinated cross-functional inputs from finance, operations, and marketing into structured Word-based reports and executive summaries.
- Conducted post-submission reviews to capture lessons learned and improve the quality and consistency of future commercial documentation.
Chief of Staff
INNOVATE-ONE-COMPANY (IONEC)
03.2021 - 03.2023
- Acted as central coordinator and reviewer for executive-level documentation across logistics, fintech, and energy portfolios.
- Reviewed analyst- and AI-assisted outputs for accuracy, tone, structure, and business relevance.
Senior Associate
ALLIANCE LAW FIRM
12.2017 - 03.2021
- Provided expert legal and contractual support for clients in Technology, Finance, Real Estate, and Aviation sectors.
- Headed the firm’s business development team, generating nearly $450,000 in fees.
- Reviewed and restructured a $640M Senior Secured Medium-Term Loan Facility Agreement, mitigating financial risks.
- Advised on regulatory compliance, contract structuring, and stakeholder negotiations, ensuring project success.
- Assisted in planning the 2019, 2020 and 2021 Annual General Conferences (AGC) of the Nigerian Bar Association (NBA), a week-long yearly event that hosts over 14,000 delegates every year in various major cities across the country with an average yearly budget of $4,000,000 (Four Million US Dollars). Worked with a team of twenty other lawyers as a member of the Technical Committee Conference Planning (TCCP) and Secretary of the Fundraising Sub-Committee.
Executive Assistant
Nigerian National Assembly (NASS)
11.2016 - 01.2018
- Assisted in planning and executing government infrastructure projects, ensuring compliance with national regulations.
- Coordinated meetings and made travel arrangements for the distinguished Senator
- Liaised with government agencies and stakeholders, supporting policy development and contract negotiations.
Sales Assistant
Home Fundraising
01.2013 - 01.2014
- Successfully secured 12 recurring donors, ensuring sustained funding and long-term support.
Research Assistant
University of Exeter
11.2011 - 06.2012
- Ensured regulatory compliance of the bye-laws in the university.
Education
Bachelor of Laws (LLB) Hons -
University of Exeter
Qualifying Exam - undefined
Nigerian Law School
Project Management MSc - undefined
Liverpool John Moores University
Skills
SQL (intermediate) – Proficient in writing queries for operational and performance analysis
Business Intelligence – Power BI, Microsoft Suite and Google Sheets for dashboard creation, forecasting, and data visualization
Cross-functional Communication – Coordinated marketing, legal, tech, and operations teams across 3 countries
Excel - Advanced analysis, financial models, QA checks, scenario testing
Process Optimization – Developed automation pipelines for reporting and performance tracking
AI Tools: ChatGPT, Copilot-style drafting and evaluation workflows
Accomplishments
- Delivered 15% procurement savings at The Rebuild through analytics-based vendor renegotiation.
- Facilitated diaspora buyer journey redesign, doubling international sales pipeline.
- Produced investor dashboards that secured project bridge financing with no equity dilution.
- Helped launch and scale tech platforms with real estate and logistics applications across 3 cities.
Affiliations
Member, Executive Council of the Nigerian Bar Association Lagos Branch (2019-2021)
Certification
Basics of Commercial Management, Alison Online Course - Credential ID 6508-30031195
Timeline
Chief Commercial Officer
The Rebuild Projects Limited
04.2023 - Current
Chief of Staff
INNOVATE-ONE-COMPANY (IONEC)
03.2021 - 03.2023
Senior Commercial Manager/ Co-Founder
RAFTERS Properties Limited
09.2019 - 04.2023
Senior Associate
ALLIANCE LAW FIRM
12.2017 - 03.2021
Executive Assistant
Nigerian National Assembly (NASS)
11.2016 - 01.2018
Sales Assistant
Home Fundraising
01.2013 - 01.2014
Research Assistant
University of Exeter
11.2011 - 06.2012
Qualifying Exam - undefined
Nigerian Law School
Project Management MSc - undefined
Liverpool John Moores University
Bachelor of Laws (LLB) Hons -
University of Exeter