Chris Castaldo

Chris Castaldo is the Chief Information Security Officer (CISO) of Flock Safety, appointed in December 2025.

Career path

Castaldo began his career in public service, serving the U.S. Army's Operation Iraqi Freedom as HUMINT Direct Support to the 101st Airborne Division, 5th Special Forces Group, 1st Infantry Division, 25th Infantry Division, and 2nd Infantry Division.

He then worked at the National Security Agency in Tailored Access Operations.

Castaldo went on to build cybersecurity programs as CISO at Synchronoss Technologies, IronNet Cybersecurity, 2U, and Dataminr.

In October 2021, he served as Crossbeam's Chief Information Security Officer, presenting a public webinar on the company's security standards and data-sharing controls.

Castaldo served as CISO at Crossbeam before joining Flock Safety, a public safety solutions provider, as Chief Information Security Officer in December 2025.

In the role, Castaldo leads Flock's security strategy, partnering across the organization to strengthen cybersecurity, risk management, and governance as the company scales its platform and customer footprint.

"What drew me to Flock was firstly, the mission, and equally importantly, the opportunity to enforce a best-in-class security program as a true force multiplier and moat for scale," said Castaldo.

Education, credentials and board roles

Castaldo holds a B.S. in Cybersecurity from American Military University and numerous cybersecurity certifications.

He is a Fellow at the National Security Institute at George Mason University's Antonin Scalia Law School, also described as a Visiting Fellow.

He is a founding board member of Security Tinkerers and serves on the board of directors for Rallye For Vets, a charity that pays direct housing and medical bills for veterans in need.

Castaldo also serves on the board of advisors for SafeBase.

Published work and talks

Castaldo is the author of Start-Up Secure: Baking Cybersecurity into your Company from Founding to Exit, described as a best-selling book.

He mentors and coaches founders, venture capital firms, and board members on scaling cybersecurity alongside the business.

He is listed as an expert by RSA Conference and has appeared on multiple cybersecurity podcasts.

In March 2026, Castaldo publicly explained how Flock Safety protects customer and community data, describing layered defenses, specialized teams, and third-party partnerships.