"We value the privacy of our users and are committed to making our products as secure as possible," Adrian Asher, the company's chief information security officer, said in a statement.
It's important that people's information is kept secure and private when they use Facebook," Alex Stamos, Facebook's chief information security officer, told Motherboard in a statement.
He has served as chief information security officer at eBay and chief security officer at Microsoft.
The company has since promised to overhaul its Web defenses and created the position of chief information security officer.
At General Motors, James Christiansen, 43, the chief information security officer, came up through the data security ranks.
"Why do we continue to see these large aggregate databases?" Eddie Schwartz, chief information security officer at the computer security firm RSA, said in an interview on Tuesday.
The telecom giant directed its online security experts, including Chandra McMahon, Verizon's chief information security officer, to do their own investigation of the hack.
The four are Chris Hlatky, a senior systems engineer; Janet Platt, a program manager; Annemarie Kline-Edens, an information security officer; and Jane Harmon, a computer scientist.
Yet it took a full year after Mr. Snowden's initial disclosures for Yahoo to hire a new chief information security officer, Alex Stamos.
Her father is the information security officer with the George E. Whalen Department of Veterans Affairs Medical Center in Salt Lake City; he is responsible for maintaining the security of the center's computer systems.
In a recent talk at Penn State University, Ms. McMahon, the telecom company's chief information security officer, suggested that she relished the cat-and-mouse game between hackers and companies.
