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Assystem Ranked Among Top Three Nuclear Engineering Firms by ENR

Assystem has secured its position as the world's third-largest nuclear engineering company in the latest Engineering News Record (ENR) rankings. Nuclear technology is central to the company's energy transition business.

15 June 2026
Assystem Ranked Among Top Three Nuclear Engineering Firms by ENR

Assystem has solidified its standing as the third-largest nuclear engineering company globally, according to the annual Engineering News Record (ENR) rankings.

The company possesses over 55 years of experience in the design and construction of nuclear power facilities. Nuclear technology is a core component of its energy transition strategy, contributing 70% of the company's total revenue.

Assystem's mission, encapsulated by its "Switch On" brand, focuses on accelerating the energy transition. In response to rising global demand for nuclear power and challenges in skilled and local resource availability, Assystem is investing in its workforce to meet client needs. Recently, the company acquired three firms specializing in digital solutions, project controls, and engineering, enhancing its supply chain capabilities within its nuclear division.

ENR conducts annual surveys across major industry segments, ranking firms in general contracting, specialized contracting, engineering, architecture, and environmental services. These rankings, based on annual revenues, are further segmented by market categories. Assystem also appeared in the Government Buildings and Power market categories, placing 13th and 15th, respectively.

Original source: assystem.com