IESC vs CRL Comparison

IES Holdings Inc owns and manages subsidiaries that design and installs integrated electrical and technology systems and provide infrastructure products and services. It has four business segments; Communications, Residential, Infrastructure Solutions, and Commercial & Industrial. The majority of the revenue for the company is generated from its Residential segment in which the company provides electrical installation services for single-family housing and multi-family apartment complexes, as well as heating, ventilation, and air conditioning (HVAC) and plumbing installation services. This segment also provides services for installing residential solar power, both for new construction and existing residences.

Charles River Laboratories was founded in 1947 and is a leading provider of drug discovery and development services. The company's research model & services segment is the leading provider of animal models for laboratory testing, which breeds and delivers animal research models with specific genetic characteristics for preclinical studies around the world. The discovery & safety assessment segment includes services required to take a drug through the early development process, including discovery services. The manufacturing support segment includes microbial solutions, which provides in vitro (non-animal) testing products, biologics testing services, and avian vaccine services.