In today’s world where technology is everywhere, cyber security is in high-demand. Some might even say it’s a national priority—just take one look at a newspaper, and you’re bound to find a cyber security front-page headline. So it’s no surprise that from small businesses to Fortune 500 companies, cyber security remains a concern across all industries.

These top security experts are helping businesses to find answers and develop strategies to protect valuable information. From hackers to F.B.I. agents to the Former Deputy Assistant to the President, this list of top experts represents a diverse group. But as the top guest cyber security keynote speakers, these experts all provide valuable cyber security insights to businesses everywhere.

1. Kevin Mitnick

Nicknamed the “World’s Most Famous Hacker,” Kevin once made the FBI’s Most Wanted list for hacking into 40 major corporations—just to prove he could. Today, he uses his extraordinary talents to assist Fortune 500 companies and government agencies around the world as a security consultant. Kevin and the Global Ghost Team use their hacking powers to address cyber security issues and show businesses how to protect themselves. Kevin has authored many books, including the New York Times bestseller Ghost in the Wires: My Adventures as the World’s Most Wanted Hacker. As one of the top cyber security experts in the world (with an intriguing background), Kevin is a captivating keynote speaker whose insights have been integral to the success of businesses around the world.

2. Juan Zarate

Juan is a leader in cyber security as a Senior Advisor to the Center for Strategic and International Studies and the Senior National Security Consultant and Analyst for CBS News. He has a track record for excellence, as the Former Deputy Assistant to the President and Deputy National Security Advisor for Combating Terrorism. As a top cyber security expert, Juan frequently shares his knowledge with businesses around the world as a cyber security keynote speaker to assist with infrastructure security.

3. Eric O’Neill

Eric is credited with using his cyber security expertise to capture the most notorious spy in U.S. history, which later inspired the film “Breach.” A background in the F.B.I., Eric now leads The Georgetown Group, an investigative and security agency, where he tackles issues of economic espionage, counterintelligence and cyber security penetrations. As a top cyber security keynote speaker, Eric weaves his expert knowledge with his inspiring, heroic story to deliver practical security insights for businesses everywhere.

4. Dennis Hightower

Dennis is a strategic leader whose expertise spans more than 30 years and across public and private sectors. He is a Former Deputy Commerce Secretary where he oversaw federal government operations. He has also served as President of Walt Disney Television & Telecommunications, CEO of Europe Online Networks, and Professor of Management at Harvard Business School. A celebrated leader in business management, Dennis is a frequent guest lecturer and guest keynote speaker who offers expert insights based on his years of experience as a strategic leader and business thought leader.

• Robert Herjavec 

If the Jaws theme song is running through your head, don’t be alarmed. Robert is well-known as one of the stars of ABC’s Shark Tank. Originally from the former Yugoslavia, he began his entrepreneurial success by developing a computer company in his basement. He’s since gone on to develop and sell multiple IT companies and launched The Herjavec Group, which has grown to be a leader in cyber security valued at more than $100 million. He is the author of two bestselling books, Driven and The Will to Win and has been named “Best Selling Author.” Robert is a top guest cyber security keynote speaker whose touching personal success story and unmatched business savvy inspire business leaders.

The content writers at BigSpeak Speakers Bureau are Experts on the Experts. They hold doctoral, masters, and bachelors’ degrees in business, writing, literature, and education. Their business thought pieces are published regularly in leading business publications. Working in close association with the top business, entrepreneur, and motivational speakers, BigSpeak content writers are at the forefront of industry trends and research.