Who We Are

We are data scientists and network security fanatics who build network visibility and forensics solutions for analysts defending some of the busiest enterprise networks in the world.  


Defense-in-depth systems like firewalls are necessary but not sufficient. Implementing an impenetrable perimeter is difficult, especially as security analysts face greater challenges such as:

  • An overwhelming flow of network traffic

  • Increasingly sophisticated attackers

  • Continuing shortage of qualified security analysts

Current approaches to defending the network enterprise are not working. This is why we believe that "the best defense is a good offense." As a cybersecurity strategy, this translates into Threat Hunting.


CounterFlow AI is a provider of advanced network traffic analysis for security operations centers (SOC). Drawing on their experience as data scientists, network security engineers, and military strategists, the Counterflow AI Team is redefining the art of threat hunting by integrating full packet capture with AI-driven streaming analytics to provide explainable insights. Designed to operate in the cloud, on premises, or as a hybrid solution, ThreatEye will enable overwhelmed security analysts to scale threat-hunting operations and significantly reduce time to detection and response.


Randy Caldejon

CEO & Co-founder  

As CEO, Randy leads the company vision, innovation, and execution. He is a widely-respected authority in network security monitoring and sensor technology. A veteran, engineer, and serial entrepreneur, Randy has over 25 years of technology leadership experience. As cohort and co-founder, he successfully exited from two cybersecurity ventures, including nPulse Technologies, which was acquired by FireEye, Inc in 2014. 

Randy served honorably in the U.S. Marine Corps. In his spare time, he enjoys biking, fly fishing, and instrumenting his farm with IoT sensors. He holds a B.S. in Computer Science from University of Maryland Baltimore County (UMBC) and a M.Eng. in Computer and Systems Engineering from Rensselaer Polytechnic Institute (RPI).


Peter Shaw

COO & Co-founder  

Peter is responsible for company operations, including sales and partner relations. Prior to CounterFlow, Peter co-founded nPulse with Randy Caldejon, and after its acquisition by FireEye in 2014, he was responsible for business development for the network forensics portfolio within FireEye. He previously held senior marketing and product management roles at Endace, Allied Telesyn, and Hewlett Packard.

Originally from New Zealand, Peter is a US citizen who has lived and worked in Australia, Hong Kong, Canada, the UK, and the US. He resides in the Boston area. When away from work, he is an enthusiastic runner and cyclist. Peter has a degree in Electrical Engineering and Computer Science from the University of Auckland, New Zealand.


Andrew Fast

Chief Data Scientist & Co-Founder  

Andrew leads the artificial intelligence and machine learning efforts at CounterFlow. He joined CounterFlow from a position as Chief Scientist of Elder Research, Inc., a leading data science consulting firm, where he worked with hundreds of companies to expand their data science capabilities. Andrew is a frequent author, teacher, and invited speaker on data science topics. In 2012, he co-authored a textbook titled Practical Text Mining that was awarded the PROSE Award in the field of Computing and Information Sciences.

Having moved from Massachusetts to Virginia, Andrew misses the watercooler chatter about Boston sports, especially the Red Sox and Patriots. His interests in sports and data science merged for an analysis of NFL coaching trees that was featured on Andrew earned his Ph.D. and M.S. degrees in Computer Science from the University of Massachusetts Amherst and B.S. in Computer Science from Bethel University.



CFO & Co-Founder  

Erik handles finance, fundraising, and other aspects of business development. Prior to CounterFlow, he has served multiple startups across varying industries, most recently at a venture-backed IoT systems company PsiKick. While a part of these startups, Erik played a role in raising over $30M in both venture investment and grant funding. In these roles, he was either the business lead or directly reported to the CEO and was tasked with ownership of finance, operations, business development, recruiting, and marketing. Prior to these startups, he spent three years in a corporate finance leadership program at Johnson & Johnson.

In his spare time, Erik is a low handicap on the golf course and is an avid supporter of his beloved Arsenal FC. He holds an MBA from the Darden School of Business at the University of Virginia and a B.S. in Finance & Marketing from Seton Hall University, where he was D1 soccer player.