Weinberg Capital Partners

Investment year
2025
Lead team
L. Mestre
D. Lebain
M. Kasper
M.A. Bourquin
B. Le Sagère
www.chesneau-serret.com
  • Expertise
    Eiréné - Security and defense
  • Fund
    Eiréné#1
  • Status
    In portfolio
  • Geographical area
    France
  • Business sector
    Security and defense

Company overview

Founded in 1965 and led by David Rémongin and Amélie Pichol, Chesneau-Serret is a leading precision mechanics company in France serving advanced markets such as civil and military aerospace, medical, energy, and industry.

The group, with nearly 100 employees across two sites in Haute-Marne (Grand Est region) and Drôme (Auvergne-Rhône-Alpes region), provides comprehensive services (machining, fitting, deburring, dimensional measurement, peening, bench testing, balancing, assembly) and engineering solutions, including the development and technical support for specialized machinery.

Our approach

The entry of the Eiréné #1 fund, which specializes in supporting SMEs and mid-sized enterprises (ETIs) in the security and defense sectors, marks a significant milestone for Chesneau-Serret’s growth.


This partnership will support the group’s ambitions by consolidating its presence in its traditional markets, accelerating its expansion into new segments, and pursuing an ambitious external growth strategy.

Key   figures

Making a difference

Chesneau-Serret is a member of the “Les entreprises s’engagent” community with the following initiatives:

  • youth and diversity:
    Recruiting without a CV for the Adjuster/Polisher (M/F) positions.
    Providing training for group professions through a partnership with Pôle Emploi (AFPR).
  • disability:
    Supporting people with disabilities within the company.