It is possible they are transitioning to a more automated force: http://knightscope.com/ http://knightscope.com/ (math I did came out to about $4 per hour, 24/7

It is possible they are transitioning to a more automated force: http://knightscope.com/ http://knightscope.com/ (math I did came out to about $4 per hour, 24/7.) If that is the case you want a smaller number of higher quality security workers in house. I can't speak for the Bay area, or Google, or the contracting firm, but security guards typically have a turnover exceeding 100%. Makes a lot of sense to have any firm deal with the bullshit that arises from having turnover that high.