Roeslein and Associates is a company specializing in engineering, manufacturing, and installation of modular process systems. Its products include coolant filtration systems, biogas cleaning skids, UVBC and decorator cooling systems, lacquer day tanks, mist collectors, etc. The company also offers consulting, project management, ignition training, fabrication, and procurement services. Roeslein and Associates caters to oil and gas, power, data centers, can making, chemical processing, and other industries.