Founder and Partners

Experience that makes the difference

Created by 6 industry professionals, each of our partners is a specialist in their field. Over 15 years of experience is required to  work at STRATGranat. Our partners have helped more than 100 organizations from the Merchant, Payment, and Fraud Prevention sectors, and have cultivated professional relationships with nearly 10,000 sector players and professionals.

Founder and Partner
Nico Vedrenne
26 years' experience
(MRC, Safecharge, Experian)
Founder and Partner
Catherine Tong
20 years' experience
(Accertify, inAuth, Tesco, PwC)



Nicolas is a certified company Director by the Instituto de Consejeros Administradores and holds a Business Administration diploma from Paris Graduate School of Management. He specialises in managing complex organisations in international environments, with a broad experience in the IT, e-commerce, marketing services, payment systems, fraud and risk management sectors. 

Practical, trustworthy, with over 25 years track records of budget achievement in fast changing situations for large floated companies or high growth businesses. Large international exposure with several years of residency in Europe, US and Latin America.

Previous engagements include Managing Director Europe of the Merchant Risk Council (MRC), Marketing Manager for Société Générale, President for Experian Hispano America an Spain, and Chief Business Development Officer at Safecharge. Nicolas is an AIESEC alumni.


Management Consultant and Adviser


Catherine is a proficient Global Fraud Expert with over 20 years’ experience in risk and fraud across multiple industries, including retail, airlines, travel and digital. She obtained a breadth of experience from different perspectives as a consultant, merchant and vendor at each of PwC, Tesco and Accertify. This experience has ranged from accounting fraud to payment fraud and general losses in eCommerce, identifying, managing and mitigating risks to drive success. For example: setting up a new fraud team and processes, running and participating in RFPs for new vendors to deliver fraud strategy, health checks for client fraud and risk strategies, risk reviews and risk mitigation plans, leading teams of fraud professionals. 


Catherine is a Certified Accountant, has a degree of the University of Exeter in Managerial Statistics, Six Sigma Blackbelt, and graduated at the Harvard Business School Leadership Excellence. She is a member of ICAEW (Institute of Chartered Accountants in England and Wales)and UK co-Ambassador for the EWPN (European Women in Payments Network). 


Maria Sarjanovich
27 years' experience
(MRC, IESE, Apple Tree Americas)

 Business & Marketing Consultant - Senior Project Manager


Maria has over 20 years expertise in entrepreneurial ventures in the Internet industry, together with extensive management experience at international level with multicultural teams. 

She specialises in management & direction of complex and large-scale projects, teams & start-ups, meetings and trade shows for large international audiences in over 20 countries.

Maria has a broad experience in coaching & mentoring as well as in content & programme development.

Her qualifications include:

  • IESE Business School – Advance Management Program

  • Univ. Politécnica de Madrid – Project Management – Postgraduate degree

  • UADE – Executive Programme in Logistics

  • ESG Luis María Campos – Strategy & Geopolitics

  • Univ. de Bs.As. (UBA) – Degree in Economics 

Her previous engagements include the  Merchant Risk Council (MRC) and IESE Business School. Maria is an AIESEC alumni.


Fabian Mansfeld
16 years' experience
(Sixt, Zalando)

Management Consultant and Adviser


Fabian Mansfeld is an expert in scaling and managing payments business infrastructure, processes and teams and is now consulting and advising merchants and financial institutions in various payment matters. He is also an expert in the car insurance claim management area.


He started his career in process and technology consulting with a strong focus on Process Management and SAP implementation projects in the insurance business.


He then built the payments department for Zalando SE, Europe’s largest fashion e-commerce Store where he was responsibility for growing Zalando’s payments organisation from one country to 15 and 3 employees to 90+.


After 5 years with Zalando he was Senior Director Damage Management & Payments at Sixt SE and responsible for the global operations in damage management and customer payments for car rental and car sharing.


Fabian has a Diploma in business administration and computer science.

Orcun Akca
17 years' experience
(Expedia, Orbitz, eDreams Odigeo, d-Local)

Payment & Fraud Prevention Management Consultant


Orcun has over 15 years of experience in the payments and fraud prevention industry with in-depth knowledge of online payments and eCommerce risk management.

He has a comprehensive background in technical and commercial aspects of the industry.

With a proven track record of reducing loss and increasing revenue, Orcun has held management and leadership roles with global companies in Europe and North America.

Orcun previous engagements include Expedia, Orbitz, Odigeo eDreams, d-Local and Safecharge

Felix Guardia
27 years' experience
(Accenture, Avanade, ToBeSingular)

Management Consultant and Coach


Felix Guardia is a seasoned Coach and Management Consultant. His certification and training around coaching, P.N.L., Mindfulness and Emotional Intelligence have unleashed the full potential of his 25 years of experience selling, running, delivering and managing multi-site and international systems integration projects.


And now, he is focused in creating, developing and supporting the professional capabilities required by the new digital economy.


Felix qualifications include:

  • Licenciado en Informática (Computer Science Degree). Universidad Politécnica de Madrid

  • Computer and Information Science post degree studies. University of Pennsylvania – Fulbright program

  • Coaching, EI and PNL studies - Universidad Rey Juan Carlos

  • Associated and Certified Coach by ASESCO

  • ITA Certified PNL Practitioner

  • MBSR (Mindfulness Based Stress Reduction) trained


Felix previous engagements include Accenture, Banco Santander and BBVA.

Founder and Partner
Rossini Zumwalt
25 years' experience
(Symantec, Emergent Payments, Docusign)
Founder and Partner
Delphine Bos
19 years' experience
Adyen, SafeCharge, Ingenico (GlobalCollect)

Management Consultant and Adviser


Rossini is the former Sr. Director, WW eBusiness Order and Payment Management for Symantec. Her role included setting the strategy and direction for payment and risk professionals to enable the growth of the B2C, B2B and Enterprise businesses. She was responsible for the direct development of payment gateway and billing engine to maximise one-time and recurring success. She also developed compliance and risk programs to minimise business risks and losses due to fraud. At a later stage of her career, she joined Emergent Payments so to expand business operations into new markets and grow payment offerings on a global scale. She manages cross-border and alternate payments portfolio, defined payments roadmap, collaborated with strategic partners, built merchant servicing capabilities, and was the advocate for customers. 

Rossini is dynamic and results-driven Financial Services Executive. Passionate in discovering consumer payment preferences and behaviours in their local markets. Define strategy for payment expansion, with high focus in emerging markets. Transform risk and fraud management programs to adapt to new threats. People leader that fosters collaboration, innovation and winning as a team.

Rossini is the former Global Board of Directors Chairman of the Merchant Risk Council (MRC) and is a Certified Treasury Professional.

Marketing & Communications Expert


Strategic marketing top executive who has built highly recognised payment brands from the ground-up including Adyen and GlobalCollect (now Ingenico) and repositioned brands such as SafeCharge. Specialising in B2B Marketing & Communications, she helped key players build brand equity and market themselves successfully. Always going for a fresh and innovative approach, she integrates thought leadership content, PR, events and digital marketing into powerful aligned systems driving businesses successes. Delphine is a Doctor in Corporate Communications (CESLSA – Sorbonne University), and listed in the top European B2B Tech Marketing 100. She is also part of the French Tech community.

Dates and sector restrictions apply

Linda Porath
15 years' experience
STRATGranat Head of Operations

Membership and Conference Management

Linda started her career in the Merchant side before moving to the European Network Group (ENG) as conference producer. Before joining STRATGranat, she managed the European community of the Merchant Risk Council - MRC (over 1500 members) and its conferences attendees (over 1000 a year). She had the overall responsibility for sourcing the new members and sponsors for the MRC in Europe. Multilingual German, English, French, Linda is internationally known for her zero default organisation and management skills. Linda now runs the entire operations organisation of STRATGranat. 

Dates and sector restrictions apply

Experience that makes the difference