Ciena Corporation is an American networking systems and software company based in Hanover, Maryland. The company has been described by The Baltimore Sun as the "world's biggest player in optical connectivity". The company reported revenues of $3.63 billion and more than 8,000 employees, as of October 2022. Gary Smith serves as president and chief executive officer. Customers include AT&T, Deutsche Telekom, KT Corporation and Verizon Communications. Wikipedia