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 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 ELV systems, such as CCTV systems, access control systems, public address systems, and building management systems. 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 leasing equipment and project and maintenance 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.