RK offers a number of different products and services. Its divisions include:
- RK Mechanical: Commercial and industrial plumbing, mechanical, process, and HVAC contracting.
- RK Electrical: Commercial and industrial electrical construction. They also offer on-call and planned maintenance electrical service.
- RK Water: Groundwater remediation and treatment, chemical treatment and water conditioning, and custom manufacturing for the commercial and industrial building, oil and gas, and agricultural industries.
- RK Service: Commercial and industrial facility services for plumbing, mechanical, HVAC, and electrical systems.
- RK Steel: Commercial structural steel and miscellaneous metals fabrication and erection, and custom fabrication and manufacturing for the telecom and energy industries.
- RK Energy: Custom fabrication and manufacturing for the oil & gas, wind, food manufacturing and industrial industries requiring ASME and modular skidded solutions.
- RK Mission Critical: Offsite constructed modular solutions for healthcare, mission critical, telecom, and power industries.