{"id":"michael-lewellen","title":"Michael Lewellen","content":"**Michael Lewellen** is an American [blockchain](https://iq.wiki/wiki/blockchain) security engineer, technology executive, and educator who serves as Head of Solutions Engineering at Turnkey. His career has focused on [blockchain](https://iq.wiki/wiki/blockchain) infrastructure, [smart contract](https://iq.wiki/wiki/smart-contract) security, enterprise software, [digital asset](https://iq.wiki/wiki/digital-assets) technologies, and [blockchain](https://iq.wiki/wiki/blockchain) education. [\\[1\\]](#cite-id-Q7ePfdWrKDOnTasF) \n\n## Education\n\nLewellen earned his Bachelor's in Computer Science from the University of Texas at Dallas. [\\[2\\]](#cite-id-nECfEnRDmKX5CEPA) \n\n## Career\n\nLewellen began his career as a web developer at The University of Texas at Dallas from 2016 to 2017, where he developed university websites and supported academic research involving SEC filing analysis and fraud detection. In 2018, he worked as a [blockchain](https://iq.wiki/wiki/blockchain) developer for Thomson Reuters, contributing to [blockchain](https://iq.wiki/wiki/blockchain)-based tax systems, [Ethereum](https://iq.wiki/wiki/ethereum) [smart contracts](https://iq.wiki/wiki/smart-contract), and proof-of-concept applications for tax compliance. He later served as Chief Technology Officer and Software Architect at Olypsis, where he designed [blockchain](https://iq.wiki/wiki/blockchain) applications and enterprise software architectures for sectors including supply chain management, taxation, and real estate.\n\nBetween 2018 and 2021, Lewellen co-founded Tarski Technologies, where he led technology strategy and consulting projects focused on [blockchain](https://iq.wiki/wiki/blockchain), artificial intelligence, automation, and enterprise software. During this period, he also worked on contract engagements as Lead Software Architect for Toyota North America, developing [blockchain](https://iq.wiki/wiki/blockchain)-based supply chain systems, and as Blockchain Architect and Technical Lead for Verizon, where he led development of a [blockchain](https://iq.wiki/wiki/blockchain)-based claims management platform. In 2020, he joined the Board of Directors of the Texas Blockchain Council and began serving as a part-time lecturer at the University of Texas at Dallas, teaching graduate-level courses on [blockchain](https://iq.wiki/wiki/blockchain) technology and [cryptocurrencies](https://iq.wiki/wiki/cryptocurrency). He has also operated Cryptocurrency Consulting as an independent consulting practice, advising organizations on [blockchain](https://iq.wiki/wiki/blockchain) technologies.\n\nLewellen joined [OpenZeppelin](https://iq.wiki/wiki/openzeppelin) in 2021 as Security Project Manager, overseeing [smart contract](https://iq.wiki/wiki/smart-contract) security audits and [blockchain](https://iq.wiki/wiki/blockchain) security initiatives. He later served as Protocol Security Advisor, supporting security monitoring and governance initiatives, before becoming Head of Solutions Architecture in 2022. In that role, he led technical architecture, client advisory work, research, and the development of [blockchain](https://iq.wiki/wiki/blockchain) security solutions while managing engineering and solutions architecture teams.\n\nIn 2025, Lewellen became Head of Solutions Engineering at Blockaid before joining Turnkey later that year as Head of Solutions Engineering. He also became Chief Technology Officer of Ion Strategies on a part-time basis. Across his career, his work has centered on [blockchain](https://iq.wiki/wiki/blockchain) security, [smart contract](https://iq.wiki/wiki/smart-contract) development, enterprise [blockchain](https://iq.wiki/wiki/blockchain) systems, [digital asset](https://iq.wiki/wiki/digital-assets) infrastructure, and technical education. [\\[3\\]](#cite-id-CpEFDmVohTyKKftI) \n\n## Interviews\n\n### DeFi Security Risks\n\nIn an April 2026 livestream interview with Certora CEO Seth Hallem, Lewellen discussed evolving security challenges in the [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) industry, focusing on the growing importance of off-chain vulnerabilities alongside [smart contract](https://iq.wiki/wiki/smart-contract) security. The conversation examined how attackers increasingly target operational infrastructure, including key management systems, endpoints, multi-signature processes, and other components outside [blockchain](https://iq.wiki/wiki/blockchain) protocols. Lewellen and Hallem discussed recent security incidents and the rise of sophisticated threat actors, including state-linked groups, using methods such as social engineering, malware, and infrastructure compromises. They emphasized that effective security requires broader threat modeling, stronger operational controls, and improved protection of off-chain systems rather than relying solely on [smart contract](https://iq.wiki/wiki/smart-contract) audits. The discussion also explored the impact of artificial intelligence on [blockchain](https://iq.wiki/wiki/blockchain) security, noting that AI can accelerate vulnerability discovery for both attackers and defenders while introducing new risks such as automated exploitation and prompt injection attacks. Lewellen highlighted the need for responsible AI adoption, secure operational practices, endpoint protection, and education to maintain security while preserving the benefits of decentralized systems. [\\[5\\]](#cite-id-5bk5hcCLpOUMgKs6) \n\n[YOUTUBE@VID](5c2_gh-bAK4)\n\n### Lewellen vs. DOJ\n\nAt the DC Privacy Summit in October 2025, Lewellen participated in a fireside chat with Mike Orcutt of Project Glitch, discussing [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) privacy, security, and regulatory challenges. Lewellen described his background as an early [Bitcoin](https://iq.wiki/wiki/bitcoin) miner and [smart contract](https://iq.wiki/wiki/smart-contract) developer, with experience in [blockchain](https://iq.wiki/wiki/blockchain) security audits and policy advocacy, and explained that concerns over potential legal risks influenced his involvement in privacy-preserving [blockchain](https://iq.wiki/wiki/blockchain) development. He discussed the role of [crypto](https://iq.wiki/wiki/cryptocurrency) security councils, describing them as trusted multi-signature groups that help coordinate protocol upgrades, emergency responses, and security improvements while maintaining decentralized governance. Lewellen examined the regulatory impact of cases such as [Tornado Cash](https://iq.wiki/wiki/tornado-cash), arguing that enforcement actions created uncertainty for developers and discouraged experimentation with privacy technologies. He also discussed his legal efforts to clarify the regulatory status of privacy-focused protocols and advocated for legislative reforms, including the [Blockchain Regulatory Certainty Act](https://iq.wiki/wiki/blockchain-regulatory-certainty-act), to establish clearer protections for developers. The conversation concluded with a discussion of cybersecurity challenges in [Web3](https://iq.wiki/wiki/web3), including the need for improved key management, user education, and infrastructure that balances self-custody with usability and security. [\\[6\\]](#cite-id-Zxvp0P667oX1fXI4) \n\n[YOUTUBE@VID](vgE6tf1E5vk)\n\n## Presenations\n\n### Privacy Is Not a Crime\n\nAt the Privacy & Compliance Summit in December 2025, Lewellen discussed the intersection of [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) privacy technology, regulatory policy, and security practices. Drawing from his experience in [smart contract](https://iq.wiki/wiki/smart-contract) auditing and policy discussions, including involvement with [Coin Center’s](https://iq.wiki/wiki/coin-center) legal efforts related to [Tornado Cash](https://iq.wiki/wiki/tornado-cash), Lewellen examined the challenges developers face when building privacy-preserving systems within an uncertain regulatory environment. He highlighted conflicting interpretations among U.S. agencies regarding whether privacy protocols qualify as money transmitters, noting that unclear guidance creates challenges for developers and operators of privacy-focused technologies. Lewellen discussed legal efforts to establish clearer protections for privacy technology development and referenced proposed legislation aimed at providing greater regulatory certainty. He also addressed international regulatory developments, including the European Union’s MiCA framework, and explored privacy-preserving compliance approaches such as Privacy Pools, which seek to maintain user privacy while reducing opportunities for misuse. Lewellen argued that privacy technologies can provide benefits for security and regulatory oversight when supported by appropriate frameworks, and emphasized the importance of collaboration between developers, policymakers, and regulators in shaping future [cryptocurrency](https://iq.wiki/wiki/cryptocurrency) regulation. [\\[7\\]](#cite-id-ZdeXlHyIhmGsDfob) \n\n[YOUTUBE@VID](YZve9LS6CC8)\n\n## Panels\n\n### Securing Billions\n\nAt ETHBoston in September 2025, Lewellen participated in the “Securing Billions” panel alongside Yolanda Liu from [Coinbase](https://iq.wiki/wiki/coinbase) and Anders Brownworth from Radius, moderated by Samara LeMerle from Cantina. The discussion focused on the challenges of securing large-scale [blockchain](https://iq.wiki/wiki/blockchain) systems and the need for security approaches that extend beyond traditional audits through layered defenses, continuous monitoring, and internal accountability. Panelists emphasized the importance of proactive threat modeling, recurring security assessments, and strong organizational ownership to identify vulnerabilities and prevent operational issues within decentralized protocols. They also discussed the role of observability tools and on-chain monitoring in detecting early indicators of compromise and improving incident prevention. The panel addressed the balance between regulation, industry standards, and innovation, highlighting the need for adaptable security frameworks and greater education across the [blockchain](https://iq.wiki/wiki/blockchain) ecosystem. Lewellen and the other panelists also shared examples of security failures, discussed the importance of private key management, and emphasized operational security practices, [consensus mechanisms](https://iq.wiki/wiki/consensus-mechanism), and comprehensive incident response planning. [\\[8\\]](#cite-id-vUUhBAf1T3REh4WK) \n\n[YOUTUBE@VID](ztKlyL0xAHg)","summary":"Michael Lewellen is a blockchain security engineer and educator, known for his work on smart contract security and blockchain infrastructure. He is Head of Solutions Engineering at Turnkey.","images":[{"id":"QmRshjiQEcwtoU5ix3Wwugc8xjKNPkrXWa2aGWWnEwW8T8","type":"image/jpeg, image/png"}],"categories":[{"id":"people","title":"people"}],"tags":[{"id":"Developer"},{"id":"Advisor"},{"id":"Speaker"},{"id":"Ethereum"},{"id":"Arbitrum"}],"media":[{"id":"https://www.youtube.com/watch?v=5c2_gh-bAK4","name":"5c2_gh-bAK4","caption":"","thumbnail":"https://www.youtube.com/watch?v=5c2_gh-bAK4","source":"YOUTUBE"},{"id":"https://www.youtube.com/watch?v=vgE6tf1E5vk","name":"vgE6tf1E5vk","caption":"","thumbnail":"https://www.youtube.com/watch?v=vgE6tf1E5vk","source":"YOUTUBE"},{"id":"https://www.youtube.com/watch?v=YZve9LS6CC8","name":"YZve9LS6CC8","caption":"","thumbnail":"https://www.youtube.com/watch?v=YZve9LS6CC8","source":"YOUTUBE"},{"id":"https://www.youtube.com/watch?v=ztKlyL0xAHg","name":"ztKlyL0xAHg","caption":"","thumbnail":"https://www.youtube.com/watch?v=ztKlyL0xAHg","source":"YOUTUBE"}],"metadata":[{"id":"references","value":"[{\"id\":\"Q7ePfdWrKDOnTasF\",\"url\":\"https://www.turnkey.com\",\"description\":\"Turnkey Official Site\",\"timestamp\":1784638719092},{\"id\":\"nECfEnRDmKX5CEPA\",\"url\":\"https://www.linkedin.com/in/michael-lewellen/\",\"description\":\"Michael Lewellen LinkedIn\",\"timestamp\":1784638719092},{\"id\":\"CpEFDmVohTyKKftI\",\"url\":\"https://www.linkedin.com/in/michael-lewellen/details/experience/\",\"description\":\"LinkedIn Experience\",\"timestamp\":1784638719092},{\"id\":\"0iuHMMBHngtVq2WR\",\"url\":\"https://x.com/LewellenMichael\",\"description\":\"Michael Lewellen Twitter\",\"timestamp\":1784638719092},{\"id\":\"5bk5hcCLpOUMgKs6\",\"description\":\"Certora Livestream interview\",\"timestamp\":1784638841667,\"url\":\"https://www.youtube.com/watch?v=5c2_gh-bAK4\"},{\"id\":\"Zxvp0P667oX1fXI4\",\"description\":\"DC Privacy Summit fireside chat\",\"timestamp\":1784638865304,\"url\":\"https://www.youtube.com/watch?v=vgE6tf1E5vk\"},{\"id\":\"ZdeXlHyIhmGsDfob\",\"description\":\"Privacy & Compliance Summit presentation\",\"timestamp\":1784638888574,\"url\":\"https://www.youtube.com/watch?v=YZve9LS6CC8\"},{\"id\":\"vUUhBAf1T3REh4WK\",\"description\":\"ETHBoston 2025 panel\",\"timestamp\":1784638908532,\"url\":\"https://www.youtube.com/watch?v=ztKlyL0xAHg\"}]"},{"id":"linkedin_profile","value":"https://www.linkedin.com/in/michael-lewellen/"},{"id":"twitter_profile","value":"https://x.com/LewellenMichael"},{"id":"rootdata_profile","value":"https://www.rootdata.com/member/Michael%20Lewellen?k=MTkxODU%3D"},{"id":"previous_cid","value":"\"https://ipfs.everipedia.org/ipfs/QmeCh7Hoh6L3Jz6bdFwMYgq6wuoM2ZZy7aAHa3BB5tzGZQ\""},{"id":"commit-message","value":"\"Added 47 hyperlinks to the content and updated events (4 -> 4 items)\""},{"id":"previous_cid","value":"QmeCh7Hoh6L3Jz6bdFwMYgq6wuoM2ZZy7aAHa3BB5tzGZQ"}],"events":[{"id":"e27c721e-bf66-4f91-8e10-a8cd006303f8","date":"2016-08-01","title":"Started Blockchain Career as Web Developer","type":"CREATED","description":"Developed university websites and supported academic research.","link":null,"continent":null,"country":null},{"id":"11d69b76-5dc1-4178-8bd2-1ef3ffd28aa5","date":"2021-01-01","title":"Joined OpenZeppelin as Security Project Manager","type":"DEFAULT","description":"Overseeing smart contract security audits and initiatives.","link":null,"continent":null,"country":null},{"id":"58ad25da-2956-4a15-97c4-fd225421e530","date":"2025-09-01","title":"Became Head of Solutions Engineering at Turnkey","type":"DEFAULT","description":"Leading the solutions engineering team for blockchain security.","link":null,"continent":null,"country":null},{"id":"14c77a62-c8eb-4e1d-a8c9-6bbd13768d32","date":"2018-06-01","title":"Co-founded Tarski Technologies","type":"DEFAULT","description":"Focused on tech strategy and consulting for blockchain and AI.","link":null,"continent":null,"country":null}],"user":{"id":"0x8af7a19a26d8fbc48defb35aefb15ec8c407f889"},"author":{"id":"0x8af7a19a26d8fbc48defb35aefb15ec8c407f889"},"operator":{"id":"0xacb6c5AD52b8f605299B0d774CE97F26e3DB80c2"},"language":"en","version":1,"linkedWikis":{"blockchains":[],"founders":[],"speakers":[]},"recentActivity":"{\"items\":[{\"id\":\"3d562a2a-2352-4adc-849c-8a90ac1c0c80\",\"title\":\"Michael Lewellen\",\"description\":\"Michael Lewellen is a blockchain security engineer and educator, known for his work on smart contract security and blockchain infrastructure. He is Head of Solutions Engineering at Turnkey.\",\"timestamp\":\"2026-07-21T16:53:39.905Z\",\"category\":\"people\",\"status\":{\"icon\":\"RiGlobalLine\",\"label\":\"Wiki Updated\",\"iconClassName\":\"text-green-500\"},\"user\":{\"name\":\"0x8af7a19a26d8fbc48defb35aefb15ec8c407f889\",\"address\":\"0xacb6c5AD52b8f605299B0d774CE97F26e3DB80c2\"},\"button\":{\"label\":\"View Summary\",\"icon\":\"RiFileTextLine\"},\"summarySections\":[{\"title\":\"content\",\"subtitle\":\"Article content replaced with a version that adds many internal wiki links and minor formatting tweaks across sections.\",\"variant\":\"modified\",\"changeCount\":8,\"changes\":[\"Intro/Lead: Added internal wiki links for terms like 'blockchain', 'smart contract', and 'digital asset' in the lead paragraph. [[1]](#cite-id-Q7ePfdWrKDOnTasF)\",\"Education: Content retained but included in the updated content block (no new citations in this section beyond existing). [[2]](#cite-id-nECfEnRDmKX5CEPA)\",\"Career: Added internal wiki links throughout (examples: 'blockchain', 'Ethereum', 'smart contract', 'cryptocurrencies', 'OpenZeppelin') and preserved the career narrative. [[3]](#cite-id-CpEFDmVohTyKKftI)\",\"Interviews — DeFi Security Risks: Added internal wiki links (e.g., 'cryptocurrency', 'smart contract', 'blockchain') and preserved discussion detail. [[5]](#cite-id-5bk5hcCLpOUMgKs6)\",\"Interviews — Lewellen vs. DOJ: Added multiple internal wiki links (examples: 'cryptocurrency', 'Bitcoin', 'smart contract', 'blockchain', 'Tornado Cash', 'Blockchain Regulatory Certainty Act', 'Web3'). [[6]](#cite-id-Zxvp0P667oX1fXI4)\",\"Presenations — Privacy Is Not a Crime: Added internal wiki links (examples: 'cryptocurrency', 'smart contract', 'Coin Center', 'Tornado Cash') and preserved content about regulatory discussion. [[7]](#cite-id-ZdeXlHyIhmGsDfob)\",\"Panels — Securing Billions: Added internal wiki links (examples: 'Coinbase', 'blockchain', 'consensus mechanisms') and preserved panel summary. [[8]](#cite-id-vUUhBAf1T3REh4WK)\",\"Other: YouTube video references and section structure remain present in the updated content (links preserved as in-new content). [[5]](#cite-id-5bk5hcCLpOUMgKs6) [[6]](#cite-id-Zxvp0P667oX1fXI4) [[7]](#cite-id-ZdeXlHyIhmGsDfob) [[8]](#cite-id-vUUhBAf1T3REh4WK)\"]},{\"title\":\"Metadata (action flags)\",\"subtitle\":\"Added metadata entries setting an 'action' flag to 'CREATE'.\",\"variant\":\"added\",\"changeCount\":1,\"changes\":[\"Added metadata field \\\"action\\\" with value \\\"CREATE\\\" (4 occurrences)\"]},{\"title\":\"Metadata (dates)\",\"subtitle\":\"Several date values were reformatted (day portion removed).\",\"variant\":\"modified\",\"changeCount\":3,\"changes\":[\"Updated date from \\\"2021-01-01\\\" to \\\"2021-01\\\"\",\"Updated date from \\\"2025-09-01\\\" to \\\"2025-09\\\"\",\"Updated date from \\\"2018-06-01\\\" to \\\"2018-06\\\"\"]}]}]}"}