Mark O'Connor Mark O’Connor Relationship Manager 224.595.8629 vCard

Mark brings over 30 years of experience in the trading and capital markets industry to the role of relationship management at Oyster Consulting. Before joining Oyster, Mark was Director of Sales and Marketing at the Chicago Stock Exchange (CHX). He managed and executed all aspects of business development, product marketing and client management at the CHX. He initiated the CHX foray into social media including Twitter, and written blogs supporting the CHX acquisition by Casin Group. Prior to his position at CHX, Mark held business development roles at British Telecom, Citigroup and Northern Trust. He earned his MBA in finance from Loyola University of Chicago, Graduate School of Business.


  • Serves as Relationship Manager in the business development arm of Oyster Consulting
  • Deep knowledge of electronic trading systems, agency trading and equity market structure
  • Business development and account management in equities, derivatives, and alternative trading systems
  • Experience with clearing firms, proprietary trading groups and large institutional trading desks
  • Established monthly conference call for institutional clients at CHX which provided information on IT upgrades, industry regulatory and trading compliance issues
  • Lead British Telecom (BT) outreach for US derivatives exchanges, providing new connectivity and data transmission to global clients
  • Involvement with co-location and connectivity in global data centers
  • Developed training program for all new trading floor hires at CHX

Career Highlights

  • Director of Sales and Marketing, Chicago Stock Exchange
  • Senior Sales Director, Automated Trading Desk
  • Business Development Manager, BT Financial Technology
  • Senior Relationship Manager, Northern Trust Securities
  • Vice President Sales and Marketing, KWS Associates
  • Sales Representative, Midwest (Chicago) Stock Exchange

Education, Accolades and Affiliations

  • MBA Finance, Loyola Graduate School of Business, Chicago, IL
  • BA Finance, Loyola University of Chicago, Chicago, IL
  • Security Traders of Chicago, Advisory Board Member