Yann Guyomar Partner

Professional Background

Yann Guyomar is a senior expert at Forvis Mazars, currently Co-Head of the Treasury & Cash Management practice. He holds degrees from Télécom ParisTech and ESSEC Business School.

He began his career in the telecommunications sector before joining Forvis Mazars in 2007, where he developed a strong specialization in corporate treasury and financial systems.

Treasury & Cash Management Expertise

Yann Guyomar supports companies in optimizing their financial flows and treasury operations, with expertise in:

• Working capital financing (BFR management)
• Cash management strategy and optimization
• Treasury-as-a-Service (outsourced treasury functions)
• Treasury information systems (TMS implementation and transformation)

Energy Sector & Strategic Focus

He is also recognized as a specialist in the energy sector, where he:

• Leads the Forvis Mazars Energy Community
• Supports companies in financing the energy transition
• Advises on treasury structuring for complex, capital-intensive industries

Areas of Expertise

• Corporate Treasury & Cash Management
• Working Capital Optimization (BFR)
• Treasury Systems & Digital Transformation (TMS)
• Treasury-as-a-Service Models
• Energy Sector Financial Advisory
• Energy Transition Financing
• Corporate Liquidity & Financial Structuring