SU Group Holdings Limited, through its subsidiaries, operates as an integrated security-related services company in Hong Kong and internationally. It operates in two segments, Security-Related Engineering Services Business, and Security Guarding and Screening Services Business. The company primarily provides security-related engineering, security guarding and screening, and related vocational training services. It also engages in the design, supply, installation, maintenance, and testing and commissioning of various security systems. In addition, the company 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, automatic fare control, automatic door, and people counting systems, as well as turnstiles; 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. SU Group Holdings Limited was founded in 1998 and is headquartered in Kwun Tong, Hong Kong. SU Group Holdings Limited is a subsidiary of Exceptional Engineering Limited.