Managed Detection Response
DeepSeas provides 24/7 threat detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments, working inside the tools your organization already owns.
DeepSeas delivers complete cyber defense for organizations in San Antonio, TX, combining managed detection and response, offensive security, risk assessment, compliance support, and strategic advisory. With approximately 30 years of experience and 24/7 monitoring capabilities, DeepSeas helps enterprise and mid-market teams identify exposure, strengthen defenses, and turn cybersecurity into a measurable strategic advantage.
Integrated cybersecurity services help San Antonio organizations monitor threats, reduce exposure, test defenses, and strengthen security programs.
DeepSeas provides 24/7 threat detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments, working inside the tools your organization already owns.
Manual penetration testing and adversary emulation use real attacker tradecraft to identify exploitable weaknesses across networks, cloud environments, applications, and infrastructure before malicious actors find them.
Continuous attack surface monitoring, vulnerability prioritization, dark web intelligence, and AI security posture management help organizations focus on the exposures most likely to lead to compromise.
Cybersecurity risk assessments examine assets, controls, processes, and potential impacts to create a prioritized, documented plan for reducing risk and supporting business decisions.
DeepSeas incident response specialists support detection, forensics, containment, remediation, recovery, malware analysis, and threat research during active cybersecurity incidents.
Governance, risk, and compliance services support program design, policy development, control monitoring, evidence preparation, audit readiness, and ongoing compliance operations.
San Antonio organizations need security programs that connect detection, prevention, response, and governance rather than creating disconnected tools and alerts. DeepSeas combines managed detection and response, offensive security, threat intelligence, exposure management, compliance support, and advisory services into a customized program. Existing SIEM, EDR, and CNAPP investments can remain in place while DeepSeas helps your team improve visibility, reduce exposure, and document measurable outcomes.
DeepSeas supports enterprise, mid-market, government, education, healthcare, and industrial organizations with measurable cyber defense outcomes.
"DeepSeas data security experts are top notch. They have helped us to improve our cybersecurity posture through risk assessments, penetration testing, and the development of a Data Governance Strategy. They are an invaluable partner."
DeepSeas brings integrated expertise, operational depth, and measurable cybersecurity outcomes to every engagement.
Approximately 30 years of cyber defense experience support practical, informed security decisions.
Continuous monitoring and response help San Antonio organizations address threats beyond normal business hours.
Bring-your-own-stack support helps organizations use existing SIEM, EDR, and CNAPP investments.
Strategic, offensive, operational, and compliance capabilities work together within one cyber defense program.
Experienced cybersecurity leaders and practitioners support complex security decisions.
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, exposure management, cybersecurity risk assessments, compromise assessments, incident response, vulnerability management, governance and compliance, virtual CISO support, strategic advisory, and security program development. Services can be combined into a customized cyber defense program based on an organization’s tools, operating model, risk priorities, and security objectives.
Speak with DeepSeas about your organization’s security priorities and current risks.
Certification held by DeepSeas specialists.
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 through the 2024 Global MDR Best Practices Award for Strategy.
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