|WATCH Zachary Ziliak in: HFT Rules: Three Part HFT Harmony on MarketsWiki.tv (January 2013)|
|Occupation||Senior Associate, Litigation and Enforcement|
Zachary Ziliak is a senior associate in Mayer Brown's Litigation & Dispute Resolution practice, with a concentration in complex financial, mathematical, and computer-related concerns. Before joining Mayer Brown, he worked in the financial sector as a trader and quantitative analyst.
In October 2012, Ziliak was named co-chair of a committee within the Chicago Quantitative Alliance that is drafting a best-practices document for the quantitative trading industry. Additionally, he sits on the committee of AT 9000, a Chicago-based group that is drafting a set of quality management standards for high-frequency trading, based on ISO 9000 engineering standards.
Ziliak began his career in 1998 with UBS, where he worked as an associate director and "quant," writing code, modeling processes, pricing derivatives and managing risk. He left the firm in 2002 to join a hedge fund, Matlock Capital Management, where he designed and implemented an option trading system and led a team of traders. 
In 2003, Ziliak made the decision to attend law school, graduating at the top of his class at Loyola University in 2006. While in law school, he worked as a consultant for optionMONSTER, where he developed an education program for options traders. After earning his JD, he worked for one year as a law clerk at the U.S. Court of Appeals, D.C. Circuit before joining Mayer Brown in Chicago.
John Lothian News Interviews
HFT Rules: Three Part HFT Harmony
High frequency trading (HFT) has been in the financial press a lot over the past several years. From the Flash Crash of 2010 to the collapse of Knight Capital in 2012, trading glitches and the negative impact of HFT on markets and investor confidence is well-documented. In this segment of the Restoring Customer Confidence series, Mayer Brown attorney Zachary Ziliak outlines the three sources that will address HFT and help restore customer confidence.
Ziliak says regulatory bodies will likely continue to address HFT guidelines, exchanges are imposing new fees on HFT practices and AT 9000, standards system for HFT practices, will help establish a higher bar for HFT participants.  Visit the Restoring Customer Confidence video series page >
Ziliak earned four undergraduate degrees (2 BS and 2 BA) from Indiana University in 1994. While at Indiana, he studied abroad at the University of Hamburg. From 1995-1998, he studied at Oxford University as a Rhodes Scholar, pursuing a DPhil in Mathematics. He eventually left at the ‘all but dissertation’ phase when he took a job with UBS. In 2002 he earned an MBA in Finance and Strategy from University of Chicago Booth School of Business. In 2006, he earned a JD summa cum laude from Loyola University Chicago School of Law.