Managed Detection Response
DeepSeas provides 24/7 detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments, using existing security tools where possible.
DeepSeas helps organizations in Seattle and across Washington strengthen cyber resilience with managed detection and response, offensive security, risk assessments, compliance support, and strategic advisory. With 24/7 monitoring, practitioner-led expertise, and support for existing security tools, our team helps identify threats earlier, reduce exposure, and turn cybersecurity into a measurable business advantage.
Integrated cybersecurity capabilities help Seattle organizations detect threats, test defenses, manage exposure, and strengthen security programs.
DeepSeas provides 24/7 detection and response across endpoint, network, cloud, identity, email, SaaS, and OT environments, using existing security tools where possible.
Manual penetration testing and adversary emulation expose attack paths across networks, cloud environments, applications, APIs, and other systems before malicious actors exploit them.
Structured assessments identify strengths, weaknesses, and prioritized risks through stakeholder interviews, asset review, risk workshops, and documented treatment planning.
Continuous attack-surface monitoring, dark web intelligence, and vulnerability prioritization help organizations focus on the exposures most likely to lead to compromise.
Practitioner-led GRC services support control development, policy design, evidence organization, continuous monitoring, and preparation for customer, insurer, and audit requirements.
Experienced advisors help leaders make defensible decisions about security strategy, operating models, technology investments, board communication, and organizational risk.
Seattle organizations face a changing mix of cloud, identity, application, operational, and third-party risk. DeepSeas brings these perspectives together through a customizable cyber defense program spanning advisory, offensive security, threat intelligence, managed detection and response, and governance. Our team works with the tools you already own, connects findings across the environment, and provides practical direction for reducing risk without adding unnecessary complexity.
DeepSeas helps organizations pursue measurable cybersecurity outcomes through connected services and experienced practitioners.
"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!"
DeepSeas combines broad capabilities with experienced practitioners and a practical focus on measurable security outcomes.
Continuous monitoring, detection, and response support organizations that cannot staff a round-the-clock security operation.
Experienced cybersecurity practitioners bring operational, executive, offensive, and compliance perspectives to each engagement.
Bring-your-own-stack support helps Seattle organizations use existing SIEM, EDR, and CNAPP investments without unnecessary replacement.
Advisory, testing, intelligence, response, and compliance capabilities work together to address Seattle-area organizations’ evolving risks.
Experienced cybersecurity leaders and practitioners support organizations across complex threat environments.
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.
Salary information is not the purpose of this service page, and compensation varies by experience, role scope, employer, and specialization. DeepSeas provides cybersecurity services rather than employment salary guidance. Organizations seeking security support can explore managed detection and response, risk assessments, penetration testing, advisory, and compliance capabilities based on their operational needs.
Talk with DeepSeas about your organization’s security priorities and risk environment.
Held by DeepSeas specialists.
Recognized as a top 40 MDR provider by Gartner.
Recognized as a Leader and top-five provider.
Award for MDR competitive strategy leadership.
Recognized with the 2024 Global MDR Best Practices Award.
Share your priorities with DeepSeas and explore a practical path toward stronger detection, response, and risk reduction.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.
To help us assist you faster, please include the reason for your message so the relevant team can reach out as soon as possible.