CTCI designs, constructs, and inspects various engineering and construction projects, plants, machinery, and environmental-protection solutions. Its primary business activities are systems and engineering solutions for the hydrocarbon processing and power markets. The company conducts studies for new or existing refineries and petrochemical facilities, and modernizes existing refineries to match clients' desires. CTCI has four operating segments: construction engineering (the majority of total revenue), environmental resources, sales, and other operating. It inspects and installs systems for transportation networks and other highly technical industrial markets. The majority of sales are derived from Asia, with Taiwan being an important region for the company.