Sean Turner CISO, hands-on security leader

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Chief Information Security Officer

Twinstake, an institutional crypto staking provider

Jun 2022 - Current (4 years 1 month)

Responsible for on-chain and off-chain security for a funded and profitable digital asset staking and infrastructure provider, from founding team through to one year post series A. Managed on-chain identity, configuration and governance for Twinstake's validator ecosystem; designed and built HSM-backed custody and consensus systems to support treasury, rebate and signing operations; designed and delivered systems for key material seeding and secure storage supporting the $2B AuD Ethereum staking operation; engaged with smart contract audits, remote signer maturity exercises (via Quantstamp), Ethereum infrastructure maturity (to meet the NORS framework) and advised the business and clients on the current threat landscape; participated in Gen

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Cloud Architect and Security Consultant

Firebolt Analytics, a global Cloud Data Warehouse platform

Jan 2022 - Jun 2022 (6 months)

Interim DevOps leadership replacing "challenging" incumbent; selection and knowledge transfer for new permanent Head of DevOps; implemented infrastructure security solutions in conjunction with security function; reviewed, reverse engineered and documented existing "account per tenant" architecture; designed target "multi-tenant / flexible” architecture (and handed this over)

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CISO (Futures)

Kraken, a well known multi-billion dollar crypto exchange platform

Dec 2018 - Dec 2021 (3 years 1 month)

Continued to run holistic security for the Futures platform and UK/Europe team, dealing with Futures-specific technology challenges, and UK-specific regulatory and operational issues - supported growth of the Futures and Benchmarks platforms into billion dollar businesses in their own right. Seconded to the global DevOps team as a lead: inherited a somewhat weakened and ineffective 10 person DevOps team, and transformed it into a highly effective 15 person team through a combination of negotiations and upskilling of incumbents, plus some strategic hires (not all engineers); built and upgraded hardened Kubernetes clusters and environments in AWS for Kraken Futures, moved Kraken Futures behind Cloudflare; hosted "on-prem” software for Kraken

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CISO

Crypto Facilities and CF Benchmarks, regulated exchange and associated data provider, acquired for $100m

Mar 2018 - Dec 2018 (10 months)

Built the security programme and function for CF and CFB, created the ISMS, selected industry frameworks to align with and worked out what crypto specific concerns needed to be addressed, produced Risk Register, roadmaps for security and infrastructure functions; replaced DevEx systems that were not working or ready for scale with more appropriate technology, e.g. migration from Atlassian and Concourse CI to Gitlab and Gitlab CI; installed and configured Kafka to support trading platform re-architecture (disruptor pattern), tuned trading and related systems, implemented Prometheus and DataDog for metrics, and Traefik ingress to replace less resilient nginx architecture; matured Kubernetes hosting environments; supported a full financial and

Platform Consultant

Vanti

Nov 2017 - Mar 2018 (5 months)

implemented on-premise Kubernetes deployment with quite nuanced requirements to support a Building Management System

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Senior DevOps Engineer

Camelot Global

Aug 2017 - Nov 2017 (4 months)

reviewed and improved a Kubernetes implementation on private cloud

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Senior DevOps Engineer

Dr Foster

May 2017 - Aug 2017 (4 months)

Docker for Windows implementation for existing application, associated infrastructure work

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DevOps Engineer

Sedex Global

Feb 2017 - May 2017 (4 months)

migration of existing application from Mesos/Marathon to Google Kubernetes Engine

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Solutions Engineer

Jetstack, a pure play Kubernetes consultancy later acquired by Venafi

Sep 2016 - Feb 2017 (6 months)

researched, consulted on and delivered an "opinionated" platform to install Kubernetes on AWS for a client's production applications; worked on popular open-source projects including flagship “cert-manager”

Lead DevOps Engineer and Information Security Officer

Wealth Wizards

Sep 2015 - Sep 2016 (1 year 1 month)

engaged with investors (Liverpool Victoria) and implemented their security recommendations, co-developed strategy and model for growth; delivered PCI SAQ D, Cyber Essentials and developed ISMS, Risk Register, policies and procedures, backup, Business Continuity and Disaster Recovery strategies; migrated the business from Rackspace to AWS, and kicked off a re-architecture programme

Information Systems Consultant

Warwick Business School

Aug 2011 - Oct 2015 (4 years 3 months)

Technology Integrator

Warwick Business School

Oct 2010 - Aug 2011 (11 months)

IT Services Consultant

Warwick Business School

Aug 2008 - Oct 2010 (2 years 3 months)

IT Services Field Engineer

BT Global Services

Aug 2007 - Aug 2008 (1 year 1 month)

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Audio-Visual Technician

Talk Events

Jul 2005 - Jul 2007 (2 years 1 month)

Sean Turner

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