Jones Day is entrusted by major corporate, banking, and private equity clients on leading cross-border deals. Pierre-Olivier Mahieu, who joined the firm in January 2025 from A&O Shearman, counts standout retail, energy, and infrastructure players among his clients and assists across M&A and equity capital markets transactions. Jonas Van Den Bossche is a notable contact within the financial services sector, bringing expertise in high-value domestic and cross-border M&A. Thomas De Muynck left the firm in October 2025, while Paul Van Hooghten retired from the practice.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Testimonials
Collated independently by Legal 500 research team.
- ‘Pierre-Olivier Mahieu and Violette Lebrun stand out.’
Lawyers
Hall of Fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Pierre-Olivier Mahieu
Other key lawyers
Jonas Van den Bossche; Violette Lebrun