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NEPSEN Tech Stack

Energy and ecological transition consulting for buildings and industry

Environmental Services Vincennes, Île-de-France 51–200 employees Founded 1979 Privately Held

NEPSEN is a 45-year-old engineering consultancy focused on energy efficiency and environmental compliance across buildings, industrial facilities, and public infrastructure. The company is structured around domain expertise (building performance, renewable integration, industrial audits) rather than horizontal services—a model that shows in their hiring mix: 28 engineering roles across 51–200 headcount, with heavy intern recruitment (14 of 34 active openings), indicating a skill-transfer and capacity-building operation. Active projects span energy audits, thermal studies, retrofit design, and performance contracts, while pain points cluster around market expansion (public tertiary segment) and operational scaling (agency rebuild, process digitalization).

Tech Stack 10 technologies

Core StackGoogle Analytics WordPress Excel Word PowerPoint LinkedIn ISO 50001 SharePoint Teams OneDrive

What NEPSEN Is Building

◆Challenges

Reducing energy consumption
Energy transition
Improving building comfort
Reducing emissions
Building comfort and value improvement
Expanding public tertiary market
Transition énergétique
Rebuilding agency activity
Ensuring technical and economic quality
Replacing a collaborator

▲Active Projects

Technical installation optimization
Feasibility studies for cooling
Réhabilitation énergétique des bâtiments
Audits énergétiques
Contrats de performance énergétique
Performance monitoring
Developing agency activity in cergy
Digitalize & optimize processes
Études thermiques
Industrial energy audit

Hiring Activity

Decelerating35 roles · 8 in 30d

Department

Engineering

28

HR

3

Construction

1

Marketing

1

Sales

1

Seniority

Intern

14

Mid

10

Senior

7

Manager

3

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About NEPSEN

NEPSEN is an independent consulting firm headquartered in Vincennes, France, serving public and private clients on energy transition and ecological sustainability. The firm operates across four main service lines: energy transition strategy and advisory (RSE, eco-design), sustainable building engineering (new construction and retrofit), renewable energy deployment (photovoltaic, biomass), and industrial energy management (ISO 50001 compliance, efficiency audits). NEPSEN became a public-benefit corporation in 2021, embedding climate and social objectives into its bylaws. Clients range from housing associations and facilities managers to industrial manufacturers and healthcare institutions. The company is actively expanding regional coverage, with recent investment in a new agency location.

HeadquartersVincennes, Île-de-France

Company Size51–200 employees

Founded1979

Hiring MarketsFrance

Frequently Asked Questions

What services does NEPSEN offer?

NEPSEN provides energy transition consulting, sustainable building design and retrofit engineering, renewable energy system design (photovoltaic and biomass), industrial energy audits (ISO 50001), and energy performance contracting. The firm also offers training and process optimization services.