William A. Vigna

Part of Prosegur Compañia de Seguridad SA, United Security Group, Inc. is a security services company based in New York, NY. United Security Group was acquired by Prosegur Services Group, Inc., part of Prosegur Compañia de Seguridad SA from February 22, 2019 on March 06, 1995.

Bell Security, Inc. provides security services. The company provides detective and security guard services. It is headquartered in New York, NY

Winfield Security Corp. has been providing security officer services since 1975 to various organizations such as corporate, commercial & residential building management, healthcare, institutions of higher learning, manufacturing, distribution, financial, and other organizations. Fortune 500 companies trust them with their security because they are always there, and their corporate office is located in New York, NY, with branch offices in northern New York, Westchester, and Manhattan. The private company is committed to excellence and has a unique and aggressive response to clients ’ needs, which has contributed to their sustained success. The company's operations control center is staffed 24 hours per day, every day of the year. The company's management and supervisory staff maintain a constant “finger on the pulse” of clients’ needs and changing requirements. The company has diverse experience serving clients in various fields such as commercial and residential real estate, fashion, education, health care, and financial services.

Prosegur Services Group, Inc. provides full-solution security services. It offers general security and aviation services which includes commercial, finance, hospitality, security solutions and patrol services. The company was founded in 1980 and is headquartered in Herndon, VA.

Part of Securitas AB, Securitas Security Services Ltd. is a British company that engages in the provision of security and investigation services. The company is based in London, UK and was founded in 1991.

Martin & Co. engages in rental, leasing and property management business. It issues various certifications, standards, and guidelines for the security profession. The company was founded in 1955 and is headquartered in Alexandria, VA.