Yann Guyomar Partner

Yann Guyomar

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

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