Imperia Engineering Partners

Inspired By Excellence & Innovation

We provide our customers with quality, cost conscious, engineering and technical services.


Imperia Engineering Partners (Imperia), a United Engineers & Constructors company, is built on a fundamental foundation of delivering quality, cost-conscious engineering projects and custom analytical solutions to our customers. We address critical customer specifications and schedules and have a long history of providing engineering and materials sciences services to hundreds of customers. Imperia looks to the future and helps customers overcome the challenges of the energy industry and technology evolution. Our professional talent delivers value in this ever-changing world, adapting to these changes with a new focus.


Imperia has served our customers for more than 35 years. Our history begins in 1986, when an engineering firm in Boston, MA, named Altran, was born. Altran became synonymous with high-end analytical engineering and materials analysis with an emphasis on the commercial nuclear power industry. In 2000, Altran Group, a multi-billion dollar international company, purchased Altran in 2004 and Stratus Engineering Associates (SEA), an engineering firm in New Jersey that provided substation design and diversified engineering services to the energy industry. As Altran’s North America Energy Division, the company evolved into a top engineering company serving customers in the US and abroad. In 2017, CriticalPoint Capital acquired Altran’s North America Energy Division, which gave rise to our new name, Imperia. In 2021, Imperia merged with United Engineers & Constructors, a CriticalPoint Capital portfolio company, expanding the solutions offering of both companies. Learn more about United at


We have been providing quality energy-related engineering and materials sciences services since 1986.

  • Electrical Engineering

  • Mechanical Engineering

  • Civil/Structural Engineering

  • Instrumentation & Controls

  • Materials Sciences & Engineering

  • Failure Analysis & Investigative Laboratory

  • Construction Management
  • Program & Project Management
  • Project Controls


Our expertise spans all phases of the asset lifecycle.

Feasibility Analysis

Conceptual Engineering

Basic Engineering

Detailed Engineering


Construction Management


Operations & Management

Facilities Modification & Repurposing


Working with our customers to identify real world solutions. Bringing ideas to life with extensive modeling tools. Engineering specifications, system one-lines, P&IDs, layouts and sections. Quality design and construction packages. Negotiating and rendering Materials and Sub-Contractor services. Qualified safe on-site management of construction activities. Working with our subcontractors to provide commissioning, start-up and testing services. Using predictive techniques through our Materials Lab and Engineering Programs group to reduce maintenance costs and outages. Supporting our customer needs with engineering modifications and modernization. End of Life Planning, Scheduling and Technical Support.