Managed Detection Response
DeepSeas provides continuous detection and response across endpoint, network, cloud, identity, email, SaaS, and operational technology environments using your existing security tools.
DeepSeas delivers complete cyber defense for organizations in Greenville, SC, combining managed detection and response, offensive security, risk assessments, compliance support, and strategic advisory. With continuous visibility across endpoint, network, cloud, identity, email, and operational technology environments, your team gets practical guidance, measurable outcomes, and expert support for reducing risk in a changing threat landscape.
Integrated cybersecurity capabilities help organizations identify exposure, strengthen defenses, and respond confidently to evolving threats.
DeepSeas provides continuous detection and response across endpoint, network, cloud, identity, email, SaaS, and operational technology environments using your existing security tools.
Structured assessments examine your assets, controls, processes, and vulnerabilities to create a prioritized, defensible plan for reducing cybersecurity risk.
Ethical hackers use manual testing and realistic attack techniques to expose weaknesses across networks, applications, cloud environments, and other defined targets.
DeepSeas designs and supports compliance programs with control development, evidence organization, gap assessments, and continuous monitoring for audit readiness.
Experienced responders help investigate, contain, remediate, and recover from cyber incidents while improving processes and defenses after the event.
Senior advisors provide practical guidance on security strategy, governance, board reporting, cyber insurance, program development, and major business decisions.
DeepSeas helps Greenville, SC organizations move beyond disconnected tools and reactive security work. Its integrated capabilities connect monitoring, offensive testing, exposure management, incident response, threat intelligence, compliance, and advisory services around your actual risk. Whether you need support inside existing platforms or a broader security program, DeepSeas provides practitioner-led guidance designed to improve visibility, prioritize action, and make cybersecurity a strategic advantage.
DeepSeas helps organizations turn cybersecurity challenges into clearer priorities, stronger operations, and measurable 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 is a pleasure to work with. They produce consistent and outstanding results for us and our program, while being thorough, knowledgeable, and easy to work with. We have not had a finding in a certification/re-certification audit in three years across five ISO standards!"
Get expert-led cybersecurity support built around your environment, priorities, and business goals.
Nearly 30 years of cyber defense experience supports practical guidance for complex security challenges.
24/7 monitoring, detection, and response helps organizations address threats beyond normal business hours.
DeepSeas works with existing SIEM, EDR, and CNAPP tools instead of requiring a wholesale technology replacement.
Coverage spans enterprise, mid-market, government, higher education, and regulated environments across South Carolina and beyond.
Experienced practitioners combine technical depth, leadership, and business-focused security guidance.
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, endpoint and network monitoring, penetration testing, security risk assessments, vulnerability management, governance and compliance support, incident response, virtual CISO services, strategic advisory, dark web monitoring, and security program development. Services can be combined into a broader cyber defense program or selected individually based on your organization’s risks, existing tools, and operational priorities.
Talk with DeepSeas experts about your environment, risks, and priorities.
Held by DeepSeas specialists.
Recognition as a top 40 Managed Detection and Response provider.
2024 Leader and top-five provider recognition.
Frost & Sullivan 2024 award for Managed Detection and Response.
2024 award for strategy.
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