A leading provider of network access control (NACWall) products, NetClarity, has named Christopher Calisi as Chairman and Chief Executive Officer. Calisi worked as a senior executive with several leading computer data integrity and security companies including Symantec, in his more than 25-year long career.

To prevent access by malicious insiders and external hackers who can easily penetrate firewall protections, NetClarity's EasyNAC appliances are used by many industries and governmental agencies. NetClarity, which sells its EasyNAC line of network access control products in 35 countries, is expanding its presence in the U.S. market while strengthening its expansion globally.

Founder and chief technology officer at NetClarity, Gary Miliefsky, said: "Christopher has the vision and expertise to take our company to the next level". "He is a global leader accomplished in creating value through successful sales channel development strategies. His drive and agility in navigating new markets will support NetClarity's rapid growth."

Calisi was, prior to joining NetClarity, the president and CEO of Overland Storage, a high technology company focused on data storage and integrity. Calisi was instrumental in developing Overland's tiered sales channel along with securing several tier one OEM contracts.

Calisi, earlier in his career, was the president & CEO of a world leader in software development tools that was later acquired by Macromedia, eHelp Corporation. Calisi also has held several senior executive positions with Symantec Corporation. Prior to Symantec he held various positions in sales and product development with Unify Corporation and Computer Associates.

Calisi said: "Much like Symantec revolutionized information security, NetClarity is poised to revolutionize network security with their next generation network access control appliances". "It is always exciting to be on the leading edge of any technology, and in joining NetClarity that's exactly where I see them being positioned."

Calisi has completed management programs at both the Harvard School of Business and The Wharton School of Business and holds a BSCS from the State University of New York.