SU Group Holdings Limited, through its subsidiaries, operates as an integrated security-related services company in Hong Kong and internationally. The company operates through two segments, Security-Related Engineering Services Business; and Security Guarding and Screening Services Business. It primarily provides security-related engineering, security guarding and screening, and related vocational training services. The company also engages in the design, supply, installation, maintenance, and testing and commissioning of various security systems. In addition, it offers threat detection systems, including X-ray machines, trace detection products, metal detectors, and mail screening machines; traffic and pedestrian control systems, such as traffic control system, automatic fare control systems, turnstiles, automatic door system, and people counting systems; and extra-low voltage systems comprising closed-circuit television, access control, public address, and building management systems to commercial properties, public facilities, and residential properties. Further, the company provides screening services, such as the detection of explosives, and incendiary devices in air cargo consignment and detection of dangerous goods through threat detection systems by screeners; and training courses for basic security services, mandatory basic safety, and training revalidation courses. Additionally, it offers equipment leasing services. The company was founded in 1998 and is headquartered in Kwun Tong, Hong Kong. SU Group Holdings Limited operates as a subsidiary of Exceptional Engineering Limited.