Mattress giant Serta Simmons Bedding LLC will employ a little more than 500 at its new Doraville headquarters campus.

The job count was one of several details that emerged Wednesday evening when Serta Simmons representatives briefly discussed the project before Doraville’s Downtown Development Authority.

Earlier Wednesday, Atlanta Business Chronicle reported Serta Simmons had picked a site for the new campus, though the company didn’t officially release the location. However, the Chronicle reported the project was believed to be destined for the site of the former Doraville GM plant, now a proposed $2 billion mixed-use redevelopment of offices, apartments, retail, and possibly a movie theater and other entertainment options.

The redevelopment, known as Assembly, is being led by Atlanta-based The Integral Group LLC.

Serta Simmons will move employees from greater Chicago, where the Serta brand has been headquartered, the company confirmed. That will help bring 80 new jobs to Georgia, officials said.

Serta Simmons is also consolidating several Atlanta area operations into the new Doraville campus, including its current Buckhead headquarters, an office in Sandy Springs, and a research and development center in Norcross.

Doraville is offering economic development incentives to support the new project. The Downtown Development Authority Wednesday approved what’s known as an abatement bond, which will provide $4.5 million in property tax breaks for the headquarters over the next 12 years.

Integral Group will sell about six acres to developer Holder Properties, which will put $65 million into developing the five-story building for Serta Simmons. The project will also include R&D space.

Earlier this week, Integral Group founder and CEO Egbert Perry declined comment on the chance of landing Serta Simmons, which was referred to in economic development circles as “Project Quartz.”

“There are [many] significant prospects with whom we have been in some level of discussion,” Perry told Atlanta Business Chronicle. “We are trying to determine the sequencing of development on the site.”

The more than 500 jobs Serta Simmons brings to Doraville begins the long process of clawing back thousands of jobs and millions in taxes the GM plant once produced annually for the small suburban Atlanta city.

Commercial real estate services company Cushman & Wakefield is leasing the project on behalf of Integral Group. Earlier this year, Atlanta Business Chronicle reported the Assembly development team has about 1 million square feet of prospective tenants lined up.

Perry said of Assembly, “There’s an extensive list of interested prospects — in the corporate user category, retail and some other users touching entertainment. There are also other specialized uses. We are in the process of getting into more solid discussions with some of the prospects.”

Article by Douglas Sams and Maria Saporta, Atlanta Business Chronicle