(Reuters) - Apollo Global Management LLC (>> Apollo Global Management LLC) is in advanced talks to acquire Presidio Inc in a deal that could value the information technology consulting company at close to $1.3 billion, including debt, according to people familiar with the matter.

Apollo, a New York-based private equity firm, has outbid other buyout firms, as well as Sirius Computer Solutions Inc, a portfolio company of Thoma Bravo LLC, in the auction for Presidio, the sources said this week.

American Securities LLC, the private equity firm that owns Presidio, hired Barclays Plc (>> Barclays PLC) and Credit Suisse Group AG (>> Credit Suisse Group AG) earlier this year to explore a sale of the company. The negotiations with Apollo have not yet been finalized, the people cautioned.

The sources asked not to be identified because the sale process is confidential. Apollo and American Securities declined to comment, while representatives for Presidio, Thoma Bravo and Sirius did not immediately respond to requests for comment.

Greenbelt, Maryland-based Presidio deploys and manages technology for customers ranging from retailers to hospitals, by partnering with companies such as Cisco Systems (>> Cisco Systems, Inc.), EMC Corp (>> EMC Corporation), Microsoft Corp (>> Microsoft Corporation) and EMC Corp's (>> EMC Corporation) VMware.

Presidio, which competes with Computer Sciences Corporation (>> Computer Sciences Corporation) and Insight Enterprises Inc (>> Insight Enterprises, Inc.), among others, is expected to generate annual revenues of $2.4 billion this year, according to Moody's Investors Service Inc.

American Securities acquired Presidio in 2011 for an undisclosed amount. It has since expanded Presidio's offerings though the acquisition of smaller peers, including INX Inc and BlueWater Communications Group LLC.

(Reporting by Greg Roumeliotis and Nadia Damouni in New York)

By Greg Roumeliotis and Nadia Damouni