Martina Ofosu
Windsor
Summary
Results-driven Finance & Operations Leader with 15+ years’ experience driving accounts receivable excellence, revenue optimisation, and vendor cost savings across the UK, EMEA and NORAM markets. Proven track record at TikTok and Marken (UPS Healthcare) in managing multi-million-dollar receivables portfolios, automating payment processes to achieve collection rate increases from 90% to 99%, and delivering over $1M annual vendor cost savings through contract optimisation and billing process improvements. Expert in vendor relationship management, regulatory compliance, and end-to-end billing transformations that support business growth, product innovation, and operational resilience. Adept at building cross-functional alignment between Finance, Product, Legal, and Commercial teams to enable sustainable revenue growth and seamless customer experience.
Overview
17
17
years of professional experience
1
1
Certification
Work history
E-Commerce Billing & Payments Program Manager
TikTok (Bytedance)
London
05.2023 - Current
- Direct $11M+ accounts receivable portfolio across UK & EU, increasing collection rates from 90% to 99% through payment automation.
- Oversee $50M+ annual courier vendor billing (Amazon, Royal Mail) under rigorous controls, saving $1M annually via contract and process optimisation.
- Review and adapt vendor contracts to align with evolving billing systems, payment methods, and regulations, improving efficiency and compliance.
- Design and implement customer-focused billing processes, reducing disputes, improving vendor/client payment experience, and accelerating cash flow.
- Partner with Product, Legal, and Finance to integrate billing systems for new business lines, enabling monetisation of emerging services.
- Produce and present revenue and AR performance reports to senior leadership, shaping strategic and operational decisions.
Finance Operations Manager (Billing) - EMEA
Marken (UPS Company)
Feltham, Hounslow
01.2022 - 05.2023
- Managed team of 18 overseeing billing, invoicing, and credit control across UK, EMEA, and NORAM.
- Led billing and cash collection transformation, increasing revenue c.$550M through process improvement and automation.
- Implemented credit control strategies, reducing outstanding balances and improving collection rates.
- Partnered with account managers to ensure accurate, on-time billing and collections; maintained strong stakeholder alignment.
- Streamlined monthly billing cycles, cutting processing time and accelerating financial close.
- Enforced risk and compliance controls, mitigating discrepancies and ensuring audit readiness.
Billing & Credit Control Management (UK &IE)
Marken (UPS Company)
Feltham, Hounslow
09.2019 - 01.2022
- Supervised 6 billing specialists and 3 credit controllers, optimising invoicing accuracy, collections, and payment negotiations.
- Managed product launch timelines, ensuring smooth billing integration and operational execution.
- Analysed billing performance data, identifying trends to enhance collection strategies and customer payment behaviour.
- Implemented policy and process documents, ensuring knowledge-sharing across teams for standardised operations.
Billing & Project Consultant
Messagebird (Bird)
London
01.2022 - 12.2022
- Assisted with the system integration for billing and payments across the EU and US markets, ensuring seamless compliance and operational efficiency.
- Optimised subscription-based billing and collection processes, improving revenue consistency and reducing payment failures.
- Collaborated with transformation teams, implementing system improvements and driving process efficiency.
- Managed product documentation, tracking launch milestones and ensuring financial alignment.
- Led process mapping and risk assessment, ensuring compliance and minimising operational risks.
Billing and Project Coordinator
Worley
London
06.2019 - 09.2019
- Managed invoice preparation and documentation, ensuring accuracy and timely processing.
- Resolved billing inquiries and supported cash receipt allocation, reducing overdue balances.
- Reconciled accounts receivable discrepancies and prepared financial reporting packages.
- Assisted engineers in project financial management, overseeing hours, orders, and quotations for validation.
- Provided financial support to project teams, ensuring effective cost control and budget adherence.
Head of Customer Service & Billing
The VPS Group
Barcelona (Spain)
08.2016 - 05.2019
- Drove customer service strategy, increasing retention and satisfaction by 85%.
- Built and implemented training programs and performance metrics for 20+ staff, elevating service delivery standards.
- Led billing process optimisation, improving multi-currency invoicing efficiency by 90% and reducing errors by 75%.
- Partnered with cross-functional teams to implement process improvements, ensuring compliance with regional regulations and maximising service quality.
Administrator /School Coordinator
Metàfora, Art Studio & Art Therapy School
Barcelona (Spain)
09.2013 - 08.2016
- Led admissions, enrolment, and student engagement initiatives, ensuring regulatory compliance and smooth transitions.
- Managed payroll, financial databases, and event coordination, optimising accuracy, resource allocation, and institutional growth.
Consular Assistant
Embassy Of Ghana
Madrid (Spain)
08.2008 - 10.2011
- Provided consular services, including passport and visa processing, national registration, and document legalization.
- Managed records, financial transactions, and multilingual communications, ensuring operational efficiency and compliance.
Education
Bachelor of Arts - Law
Universitat De Lleida
Lleida, Spain /2004 - /2010
Skills
- Global Billing & Receivables Strategy ($500M Revenue Portfolios)
- Collections Optimisation & Dispute Resolution (Up to 65% Performance Improvement)
- Payment Automation & Digital Transformation (90% → 99% Collection Rates)
- Revenue Reporting & Business Intelligence
- Customer & Vendor Experience Leadership
- Audit Readiness, Compliance & Governance (UK/EU Regulatory Frameworks)
- Process Improvement & Cost Optimisation ($1M Savings pa)
- ERP & Financial Systems Implementation (SAP, Oracle)
- Cross-Regional Team Leadership (UK/EMEA/NORAM)
- Business Development & New Product Support
Languages
English, Spanish
Native language
Catalan
Advanced
C1
Italian
Intermediate
B1
French
Beginner
A1
Twi
Native
Certification
- Google Project Management - Professional Certificate
Accomplishments
- TikTok (Bytedance): Led automation and process optimisation in billing and payments , securing a 98% collection rate and achieving 95% client satisfaction , enhancing the global seller experience.
- Marken (UPS): Spearheaded the transformation of EMEA billing operations , increasing revenue by $550M and improving key financial metrics by 80% , while optimising compliance and risk management.
- VPS Group (Spain): Overhauled customer service and billing processes , increasing operational efficiency by 90% , reducing invoicing errors by 75% , and driving an 85% increase in customer retention .
References
References available upon request.
Timeline
E-Commerce Billing & Payments Program Manager
TikTok (Bytedance)
05.2023 - Current
Finance Operations Manager (Billing) - EMEA
Marken (UPS Company)
01.2022 - 05.2023
Billing & Project Consultant
Messagebird (Bird)
01.2022 - 12.2022
Billing & Credit Control Management (UK &IE)
Marken (UPS Company)
09.2019 - 01.2022
Billing and Project Coordinator
Worley
06.2019 - 09.2019
Head of Customer Service & Billing
The VPS Group
08.2016 - 05.2019
Administrator /School Coordinator
Metàfora, Art Studio & Art Therapy School
09.2013 - 08.2016
Consular Assistant
Embassy Of Ghana
08.2008 - 10.2011
Bachelor of Arts - Law
Universitat De Lleida
/2004 - /2010
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