DeepSeas and GreyCastle Security Partner to Offer a Comprehensive Cyber Defense Program for Mid-Market Clients 

May 10, 2023

San Diego, CA and Troy, NY – May 10, 2023 — Threat actors are collaborating to attack. It only makes sense for defenders to collaborate in return. Today, DeepSeas LLC and GreyCastle Security LLC announced a strategic partnership. GreyCastle has chosen DeepSeas as its managed detection and response (MDR) service provider. DeepSeas technical controls combined with GreyCastle advisory and risk consultation will ensure clients can prioritize investments and measure progress against cyber frameworks and controls. 

“We’re a trusted leader in cybersecurity strategy and preparedness, and we embrace the fact that our customers expect us to bring forth effective solutions that best suit their needs, now and into the future,” said Dan Kalil, CEO of GreyCastle Security. “To that point, we’ve worked closely with DeepSeas for over a year, and now is the right time to launch this partnership. DeepSeas MDR+ aligns well with our offerings and we’re proud to be partnered with them.”  

Together, this partnership will serve as a force multiplier to always be one step ahead of attackers in the cyber kill chain. When threat attackers come to an organization defended by DeepSeas and GreyCastle Security, they are more likely to move on to a lesser-defended target.   

DeepSeas Managed Detection and Response solution, which we call MDR+, relies on an initial line of high fidelity, interactive threat detection, and response capabilities, with the primary detection response tool being endpoint detection and response,” said Mike Johnson, VP of Partners & Alliances at DeepSeas. “High-speed security event log search and reporting then add the critical context and incident response lookback support, while Machine Learning-powered threat hunting provides advanced threat visibility in even the most hostile environments.”  

GreyCastle Security CEO, Dan Kalil and DeepSeas CEO, Chris Esemplare will be hosting a joint webinar on Wednesday, May 17, 2023 to further discuss the new partnership and the DeepSeas MDR+ solution. We invite you to join us. Register today for the webinar

About DeepSeas 

With nearly 30 years of experience in cyber defense, DeepSeas is trusted by 350+ clients, including Fortune 100 enterprises and mid-market organizations. Leveraging deep expertise that combines world-class cyber threat detection with industry-leading analysts, tailored threat intelligence, and accredited incident responders, DeepSeas is always on, always watching. Its Managed Detection & Response offerings, DeepSeas MDR+, is anchored by its 2022 acquisition of Booz Allen Hamilton’s (NYSE: BAH) commercial Managed Threat Services (MTS), which was named the most innovative global MDR service provider by Frost & Sullivan. DeepSeas is the first and only MDR provider that covers the entire converged attack surface for the mid-market, including OT, IT, cloud, and mobile. Its full-spectrum cyber threat monitoring service is award winning and backed by world-renowned researchers, data scientists, and mathematicians who have published over 250 papers and created a broad base of intellectual property, while achieving a number of scientific breakthroughs in the areas of big data, machine learning and artificial intelligence as it applies to the detection of advanced and unknown cyber threats. 

About GreyCastle Security 

GreyCastle Security is the industry’s leading provider of risk assessment, mitigation, and certification-preparedness services. The company is focused on helping organizations establish effective cybersecurity programs, minimize the impact of security incidents and simplify compliance. GreyCastle Security has clients throughout North America, specializing in cybersecurity for healthcare, higher education, financial services, technology, and critical infrastructure. GreyCastle Security provides Risk Assessment, Compliance, ISO-27001, GDPR, PCI, Awareness, Vulnerability Assessment, Penetration Testing, ISO and Incident Response services to businesses throughout North America. Its team is comprised of certified professionals and former security officers who bring a customer perspective to everything they do. 


Anna Seacat, DeepSeas, Chief Marketing Officer, 

Troy Perry, GreyCastle Security, Director of Marketing,