Senior Blockchain Security Architect – Hybrid

LTM; Jersey City (NJ); Hybrid; USD 150,000 - 344,000; Full time

Benefits offered by this job

Medical and dental coverage

Pension and 401(k)

Paid time off

Job summary

EY's Blockchain & Digital Assets practice is seeking a highly experienced Senior Manager to serve as a lead technical architect and trusted advisor for institutional clients navigating the rapidly evolving digital asset ecosystem.

This role combines deep technical expertise in cryptography, cybersecurity, and digital asset custody with strategic advisory capabilities to help organizations safeguard digital assets against traditional cyber threats and emerging AI-enabled attack vectors.

Qualifications

• Bachelor's degree in Computer Science, Engineering, Mathematics, Cybersecurity, or related technical discipline.
• Minimum of 8 years of experience in cybersecurity, systems engineering, blockchain security, digital asset infrastructure, or cryptographic research.
• Demonstrated hands-on experience managing private key lifecycles, digital asset custody operations, signing ceremonies, and enterprise-scale key management programs.
• Deep knowledge of Bitcoin and Ethereum architecture, including the Bitcoin UTXO model, Bitcoin Script, Lightning Network, EVM, account abstraction, validator operations, and staking mechanisms.
• Strong understanding of security models and architectural trade-offs across blockchain ecosystems such as Solana, Cosmos, and Polkadot.
• Advanced knowledge of cryptographic primitives and protocols, including SHA-256, Keccak, ECDSA, Schnorr signatures, Multi-Party Computation (MPC), and threshold signature schemes.
• Experience with traditional cybersecurity domains, including Linux security, network segmentation and isolation, application and API security, and infrastructure hardening.
• Experience leveraging generative AI and large language models (LLMs) for security analysis, threat detection, vulnerability assessment, and code review activities.
• Experience leading technical teams and delivering complex client-facing projects.

Responsibilities

• Infrastructure safeguarding: Design, assess, and audit institutional-grade digital asset custody solutions, including MPC, HSMs, and air-gapped cold storage environments.
• Protocol Analysis: Conduct technical evaluations of Bitcoin, Ethereum, and emerging Layer 1 and Layer 2 ecosystems, focusing on security assumptions, consensus mechanisms, attack vectors, and operational risks.
• AI-Driven Threat Modeling: Develop defensive strategies to address AI-assisted cybersecurity risks, including autonomous vulnerability discovery and multi-stage attack scenarios.
• Cryptographic Implementation: Provide SME in ECC, ZKPs, threshold signature schemes, and distributed key management systems.
• Incident Response & Engineering: Lead technical incident response efforts during active security events, coordinating engineering and security teams to contain threats and strengthen infrastructure resilience.
• Strategic Advisory: Translate complex technical risks into actionable business intelligence for C-suite, focusing on infrastructure trust models and verifiable digital assets.
• Practice Development: Lead complex client engagements, manage cross-functional teams, and support business development through thought leadership, market insights, and client pursuits.

Skills

Blockchain security

Cryptography

Cybersecurity

Stakeholder communication

Incident response

Team leadership

Consulting / advisory

Education

Bachelor's degree in CS/Engineering/Math

Master's degree (preferred)

Job description

EY's Blockchain & Digital Assets practice is seeking a highly experienced Senior Manager to serve as a lead technical architect and trusted advisor for institutional clients navigating the rapidly evolving digital asset ecosystem.

This role combines deep technical expertise in cryptography, cybersecurity, and digital asset custody with strategic advisory capabilities to help organizations safeguard digital assets against traditional cyber threats and emerging AI-enabled attack vectors.