Malcolm Collins, president of enterprise networks for Nortel, has left the company.

The departure of Collins, who was based in Research Triangle Park, was announced by Nortel as part of a reorganization announcement it made on Friday.

Collins, who had worked at Nortel for some 13 years, was named heard of the enterprise group in December of 2002.

Nortel (NYSE: NT) cited no reason for his departure.

The corporate reorganization includes two product groups: Enterprise Solutions and Packet Networks, to be led by Steve Slattery, and Mobility and Converged Core Networks, to be led by Richard Lowe.

“By creating two product groups, Nortel greatly simplifies its business model and creates new cost-efficiencies by leveraging common hardware and software platforms,” the company said in a statement.