Security Program Development
DeepSeas builds cybersecurity programs around business goals, risk, governance, policies, metrics, and operating capabilities, helping organizations move from reactive security to continuous improvement.
Build a cybersecurity program that supports business objectives, reduces uncertainty, and produces measurable outcomes. DeepSeas combines strategic advisory, risk assessments, offensive security, governance, compliance, threat intelligence, and managed defense into a customized approach for enterprise and mid-market organizations across the United States. With nearly 30 years of experience, its experts help leaders make informed security decisions and strengthen resilience.

Integrated advisory, assessment, testing, compliance, and defense services designed around your organization’s actual cyber risk.
DeepSeas builds cybersecurity programs around business goals, risk, governance, policies, metrics, and operating capabilities, helping organizations move from reactive security to continuous improvement.
Senior advisors help leaders make consequential security decisions, prepare for board and insurer discussions, prioritize investments, and align cybersecurity strategy with business objectives.
Structured assessments examine assets, controls, processes, and likely attack paths to identify prioritized risks and create a defensible plan for treatment, mitigation, transfer, or acceptance.
A DeepSeas vCISO provides executive-level guidance for governance, risk management, reporting, security planning, compliance requirements, and ongoing oversight without requiring a full-time CISO hire.
Ethical hackers use penetration testing, red teaming, adversary emulation, and social engineering assessments to reveal weaknesses and validate whether security controls work as intended.
GRC specialists develop policies, controls, evidence, risk registers, and compliance programs that support audit readiness and ongoing requirements across recognized security frameworks.
Cybersecurity strategy should do more than document weaknesses. DeepSeas connects executive advisory with practical security operations, offensive testing, threat intelligence, governance, compliance, and managed detection. The result is a program shaped around your organization’s real exposure, existing tools, available resources, and business priorities. Whether you need a new foundation, stronger oversight, or specialized expertise, DeepSeas helps turn cyber risk into informed action.

Explore how integrated cyber defense helps organizations strengthen security, prepare for scrutiny, and make better-informed decisions.
DeepSeas combines strategic perspective with hands-on cybersecurity expertise and operational capabilities.
Nearly 30 years of cyber defense experience informs practical recommendations and durable security programs.
Advisory, offensive security, intelligence, detection, response, and GRC work together instead of operating in silos.
Programs emphasize documented progress, clearer priorities, shorter audit cycles, and measurable return on investment.
Customized combinations of technology, personnel, and services support organizations as their security needs evolve.
Experienced cybersecurity leaders bring strategy, operations, and governance together.

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.
Cybersecurity consulting can include strategy, risk assessments, security program development, vCISO advisory, governance and compliance, penetration testing, incident readiness, and managed security guidance. DeepSeas combines these capabilities according to an organization’s priorities rather than applying one fixed package. The engagement may focus on a specific decision, a broader transformation, or ongoing support for a developing security program.
Talk with DeepSeas experts about your priorities, risks, and next steps.
Recognized as a top 40 Managed Detection and Response provider.
Recognized as a Leader and top-five provider in the 2024 Frost Radar Global Managed Detection and Response Market.
Best Practices Competitive Strategy Leadership Award for Managed Detection and Response.
Recognition for strategy in the 2024 Global MDR Best Practices Award.
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