As reported by USA Today, the perpetrator of the massacre in Orlando, Florida -- Omar Mateen -- had been employed by G4S since 2007.
G4S is connected to nuclear weapons and nuclear power security in the U.S., including at the Department of Energy's (DOE) Savannah River Site, Naval Base Kitsap, Nevada National Security Site (formerly the Nevada [Nuclear Weapons] Test Site, which includes the proposed Yucca Mountain high-level radioactive waste dumpsite), the Nuclear Regulatory Commission (including its headquaters buildings in Rockville, Maryland, just outside Washington, D.C.), and URENCO USA (Uranium Enrichment Corporation, which operates a uranium enrichment facility in New Mexico). See below.
G4S is headquatered in the U.K. It is the largest private security firm in the world, with more than 600,000 employees working in 110 countries, the USA Today article reports.
The article reports G4S carried out two security checks on Mateen -- when it hired him in 2007, and again in 2013, the same year FBI agents questioned him regarding connections to terrorist groups. Mateen cleared both G4S security screenings, however, and continued working as an armed security guard for the company right up to his massacre of 50 people, and wounding of nearly as many more, at a gay nightclub in Orlando.
The article reports that G4S is conducting its own investigation, to determine whether company weapons were used by Mateen in carrying out the massacre. G4S also made the odd statement that Mateen was not on the company clock when he carried out the massacre.
Although Mateen's G4S employment was at a gated retirement community, the company is associated with security at numerous nuclear-related facilities in the U.S.
G4S's -- and U.S. government agencies', including the FBI's -- inability to detect Mateen's violent plans before he carried them out, begs the question: what security breaches may exist at U.S. nuclear facilities guarded by G4S-related companies and personnel?
Tom Clements at Savannah River Site Watch in Columbia, South Carolina, sent out the following email message in the aftermath of the Orlando massacre:
The Orlando shooter has been reported to have worked as a security guard with G4S security company.
G4S provided security at the DOE's Savannah River Site until late 2014 and then the company was taken over by a company named Centerra.
Centerra-SRS <http://sro.srs.gov/centerrasrs.html> appears to have
inherited G4S employees, according to an Augusta (Georgia) Chronicle article -
(http://chronicle.augusta.com/news/business/2014-11-25/srs-security-firm-bought-private-group%23):
"G4S Government Solutions said that there should be no changes to personnel or staffing due to the ownership change."
I have emailed SRS about this and if there will be any security review of Centerra-SRS or personnel.
List of sites where Centerra works:
http://www.centerragroup.com/federal-and-commercial-security.html
Selected Federal and Commercial Security Customers