Managed Detection Response
DeepSeas MDR delivers 24/7 threat detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments using existing security tools.
Explore cybersecurity services from DeepSeas for organizations in San Diego seeking stronger detection, faster response, and measurable risk reduction. With nearly 30 years of experience and coverage spanning managed detection, offensive security, compliance, advisory, cloud, and operational technology, DeepSeas helps enterprise and mid-market teams build resilient defenses without replacing the tools they already use.
DeepSeas combines continuous monitoring, proactive testing, advisory, compliance, and response capabilities into a complete cyber defense program.
DeepSeas MDR delivers 24/7 threat detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments using existing security tools.
Controlled assessments identify weaknesses across systems, infrastructure, applications, and processes, helping organizations prioritize practical risk reduction before attackers exploit gaps.
Ethical hackers use manual testing and real attacker tradecraft to evaluate networks, cloud environments, applications, physical access, and social engineering exposure.
Continuous attack surface monitoring, vulnerability prioritization, dark web intelligence, and remediation tracking help organizations focus on the exposures most likely to matter.
DeepSeas develops compliance programs, maps controls, organizes evidence, and supports audit readiness across frameworks including ISO 27001, SOC 2, CMMC, PCI DSS, and NIST.
Senior advisors provide guidance for security strategy, board reporting, acquisitions, insurance reviews, technology decisions, and organizations without a full-time CISO.
DeepSeas brings detection, offensive security, threat intelligence, compliance, incident response, and strategic advisory together through a customizable program. Organizations can keep their existing SIEM, EDR, and CNAPP tools while adding the people and expertise needed to operate them effectively. For San Diego organizations managing distributed technology, cloud environments, regulated data, or growing attack surfaces, this connected approach turns isolated findings into prioritized action and measurable security improvement.
DeepSeas helps organizations worldwide pursue proactive, customized, and measurable cybersecurity outcomes.
"In cybersecurity we were not looking for a vendor, we were looking for a trusted partner that could push us, challenge us, and ensure we got better at protecting our systems every day. We found that partner with DeepSeas, and they have helped us be far smarter and better than..."
DeepSeas connects experienced practitioners, operational coverage, and strategic guidance in one cyber defense partner.
Nearly 30 years of cyber defense experience supports practical guidance for complex security environments.
24/7 monitoring, detection, and response helps San Diego organizations maintain visibility beyond business hours.
Bring-your-own-stack support helps teams use established SIEM, EDR, and CNAPP investments without unnecessary replacement.
Documented findings, actions, and improvement help leaders demonstrate risk reduction to boards, auditors, and insurers.
Experienced cybersecurity practitioners guide strategy, operations, compliance, and response.
Chief Executive Officer
Lewie Dunsworth serves as Chief Executive Officer of DeepSeas, leading the company's mission to make cybersecurity a strategic advantage for nearly 1,000 organizations worldwide. Under his leadership, DeepSeas has grown into a recognized leader in Managed Detection and Response, earning recognition from Gartner and Frost & Sullivan as a top provider in the industry. Lewie drives the company's vision across its six-layer cyber defense stack, spanning strategic advisory, offensive security, threat intelligence, managed detection and response, the CyberFusion SOC, and governance, risk and compliance. He is committed to ensuring that enterprise, mid-market, government, and education clients receive proactive, measurable, and customized cybersecurity outcomes. Lewie's leadership reflects nearly three decades of industry experience and a steadfast focus on client trust and operational excellence.
CISM, CIPP/E, SANS GCIH, GIAC, HITRUST
Keith Robertson brings 25 years of governance, risk management, and compliance experience to DeepSeas, including prior service as a Fortune 500 Chief Security Officer and Enterprise Risk Officer. He holds an impressive array of certifications, including CISM, CIPP/E, SANS GCIH, GIAC, and HITRUST, reflecting his comprehensive expertise across security management, privacy, incident handling, and healthcare compliance. Keith's executive-level experience gives him a unique perspective on enterprise risk, allowing him to help DeepSeas clients align cybersecurity strategy with broader business objectives. His background in high-stakes corporate security leadership positions him well to guide organizations through complex governance challenges and regulatory requirements. Keith is committed to helping clients build mature, enterprise-grade risk management programs that support long-term security and compliance success across diverse industries.
CISSP, CCSK, Licensed Attorney
Sean Duffy combines 25 years of cybersecurity experience with a unique legal background, holding both CISSP and CCSK certifications as well as a license to practice law. A United States Navy veteran, Sean brings a disciplined, mission-focused approach to his work advising C-suite executives and boards of directors on cybersecurity strategy and risk. His legal expertise allows him to provide clients with a nuanced understanding of regulatory and liability considerations alongside technical security guidance, a combination that is especially valuable for organizations navigating complex compliance landscapes. Sean's extensive advisory experience makes him a trusted voice for senior leadership teams seeking to understand cybersecurity risk in business terms. His military background and legal training reflect the depth and diversity of expertise that defines the DeepSeas team.
CISSP, HITRUST
Matt Lammers is an experienced CISO and IT risk executive who brings both deep technical certification and management consulting experience to DeepSeas. Holding CISSP and HITRUST credentials, Matt has built a career helping organizations strengthen their cybersecurity posture while managing enterprise-level risk. His consulting background equips him with strong skills in translating complex security concepts into actionable business strategies for executive stakeholders. Matt's international perspective, including his status as an Australia permanent resident, gives him valuable insight into global compliance and security considerations that benefit DeepSeas clients operating across borders. He is dedicated to helping organizations build resilient, well-governed cybersecurity programs that align with both operational needs and executive priorities, reinforcing DeepSeas' commitment to customized, outcome-driven security solutions.
DeepSeas provides managed detection and response, network and endpoint monitoring, penetration testing, compromise assessments, vulnerability and exposure management, incident response, governance and compliance, security program development, virtual CISO support, and strategic security advisory. Services can be combined into a broader cyber defense program or selected to address a specific operational, compliance, or risk priority.
Talk with DeepSeas about your organization’s security priorities and operating environment.
Recognition as a top 40 MDR provider by Gartner.
Recognition as a Leader and top-five provider in the 2024 Frost Radar market.
Award for competitive strategy leadership in managed detection and response.
Recognition for strategy in global managed detection and response best practices.
Share your security priorities with DeepSeas to discuss practical monitoring, testing, advisory, and risk reduction options.
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