(CBS) LOS ANGELES Unionized security officers from across the country will join with local clergy and community groups Monday to demand better working conditions for security officers working in Los Angeles.

The Five Days for Freedom mobilization will reach more than 600 major office buildings, uniting thousands of security officers throughout Los Angeles County, according to Gina Bowers, a spokeswoman for Service Employee International Union.

Stand for Security Coalition's team of clergy and unionized security guards from San Francisco, Chicago and New York City will ask Los Angeles security officers to sign cards as part of an effort to unionize them.

Union organizers say local security guards earn an average of $8 per hour without benefits.

Nearly 70 percent of security officers in Los Angeles are African Americans, and most live in South Los Angeles, according to Bowers. If local security officers earned the same wages and benefits as Los Angeles janitors, it would bring an estimated $100 million more a year into South Los Angeles, Bowers said.