Regan Sizer

Regan Sizer Email and Phone Number

Regan Sizer's Location
Fairfield, Connecticut, United States, United States
About Regan Sizer

As the Head of US Markets Technology and Managing Director at Santander US Capital Markets, and the Chief Technology Officer at Amherst Pierpont Securities LLC (prior to acquisition), I have over 14 years of experience in orchestrating the technology buildout and scaleup of a fixed income primary dealer from startup to successful exit. I have a strong background in computer science, system integration, and fixed income electronic trading, which enables me to partner closely with the business to enhance client experiences, drive revenue growth, and explore new business avenues.I thrive in ambiguous and evolving environments, evident in the seamless integration of systems, processes, and personnel from three mergers. I have led and empowered high performance technology teams and infrastructure while ensuring compliance with SEC and FINRA regulations, leveraging hybrid cloud environments, and implementing vendor integration, straight through processing, process automation, electronic trading, low latency and big data infrastructure. I am a visionary leader with a keen eye for detail and a history of success in fostering innovation, stability, and transformational growth.

Regan Sizer's Current Company Details
Graphene Capital Management

Graphene Capital Management

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Regan Sizer Work Experience Details
  • Graphene Capital Management
    Chief Technology Officer
    Graphene Capital Management Oct 2024 - Present
    New York, United States
  • Amherst Pierpont Securities Llc
    Chief Technology Officer
    Amherst Pierpont Securities Llc Oct 2009 - Sep 2023
    New York, New York, United States
    One of the first 10 employees; hired by the founders of Pierpont Securities to execute their vision of creating a premier fixed income broker dealer. Funded by private equity firms: General Atlantic and Stone Point Capital, was responsible for hiring and building the Software Engineering, Product Development, Quality Assurance, Database, Business Intelligence, Infrastructure, IT Operations and quant teams that would form the foundation for the firm and provide services to all areas of the business, including the front-, middle- and back-office, compliance and risk.Amherst Pierpont Securities was acquired by Santander Bank in 2021
  • Santander Us Capital Markets
    Head Of Us Markets Technology | Managing Director
    Santander Us Capital Markets Oct 2009 - Sep 2023
    New York, United States
    Managed the merger and integration of all systems and processes of Amherst Pierpont Securities (APS) and Santander Investment Securities (SIS) to create a new primary dealer: Santander US Capital Markets, including consolidating onto a single instance of Bloomberg TOMS, standardizing the infrastructure (including telephony / hoots) and unifying the trading platforms and back-office systems, using the best of breed from the merged entities. The result was a unified platform that reduced costs, was easier to manage and provided a more efficient client onboarding process and higher levels of straight through processing using process automation.
  • Maine Course Capital
    Technical Architect And Lead Algo Developer
    Maine Course Capital Sep 2007 - Sep 2009
    Chicago, Illinois, United States
    Algorithmic / model based trading with a proprietary trading firm. Built the infrastructure (software and hardware) for both automated and semi-automated trading strategies for a proprietary trading firm, specializing in trading strategies for bond futures. Features included signal generation, real time charting, heatmaps, spread based orders, back-testing framework and portfolio management.The founder of Maine Course Capital became one the founders of Pierpont Securities. Maine Course Capital was dissolved in 2009 and the employees become part of the initial core team of Pierpont Securities.
  • Bank Of America
    Vp, Team Lead, Fx Options And Payments
    Bank Of America Oct 2001 - Aug 2007
    Chicago, Illinois, United States
    • Responsible for building a structuring, pricing and risk management tool for the FX options desk to allow them to quickly structure and price complex products using several models, including monte carlo simulations. • First bank to offer dealable prices on FX options in over 200 currencies on Bloomberg.• Managed an offshore team of 12, as well as development resources in multiple locations and time zones (Chicago, New York, London, India).• One of the first teams at BofA to adopt the Agile and Test Driven Development (TDD) (trained by ThoughtWorks)
  • Zymatriks Corporation
    Co-Founder
    Zymatriks Corporation Nov 2000 - Sep 2001
    Chicago, Illinois, United States
    Co-founder, technical architect and pre-sales engineer for a voice portal startup company. Built an MVP that allowed free form speech input to popular CRM tools, as well as instant access to corporate email, calendars and contacts via the same voice interface.Lessons Learned: The startup failed because the industry was pushing Wireless Application Protocol (WAP) in the early 2000s, which would eventually be replaced by Smartphones in the mid-2000s. However, services like Alexa and Siri would later prove that there was still a market for voice interfaces.
  • Interim Technology
    Software Developer
    Interim Technology 1999 - 2000
    Chicago, Illinois, United States
    Consultant at a disaster recovery firm, helping companies prepare for the infamous Y2K bug.

Regan Sizer Education Details

Frequently Asked Questions about Regan Sizer

What company does Regan Sizer work for?

Regan Sizer works for Graphene Capital Management

What is Regan Sizer's role at the current company?

Regan Sizer's current role is CTO.

What schools did Regan Sizer attend?

Regan Sizer attended University Of The Witwatersrand.

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