IEX, the dark pool operator that recently was awarded exchange status by the U.S. Securities and Exchange Commission, hired Elaine Wah to oversee the venue’s budding in-house market surveillance effort. Wah is a recent Ph.D. graduate in Computer Science & Engineering from the University of Michigan. Her research interests lie at the intersection of economics and artificial intelligence, specifically in applying agent-based modeling, simulation, and game theory to study algorithmic trading in financial markets. She has interned previously at Citigroup, Microsoft Research New York City, and the Division of Economic and Risk Analysis at the SEC. Prior to Michigan, she completed a BS in Electrical Engineering at the University of Illinois at Urbana-Champaign and an MS in Computer Science at UCLA. She reports to COO and co-founder John Schwall.

If you have a new job or promotion, let me know at jdantona@marketsmedia.com

Jim Iorio has joined electronic FX and fixed income platform EBS BrokerTec as its new global head of sales and member of the firm’s executive management committee. Based in New York, Iorio will be responsible for all sales across both the EBS and BrokerTec platforms, spanning multiple asset classes and products. He came from Barclays where he was global head of currency and commodities distribution. During his career at Barclays and Lehman Brothers, Iorio held a wide variety of senior roles across fixed income asset classes, and has extensive experience leading high-performing global organizations through significant change and business cycles. He reports to Gil Mandelzis, CEO of EBS BrokerTec.

Options data vendor OptionMetrics has added several veteran systems engineers, software engineers and quality assurance specialists, growing its global technology, development and operations team. The new team members come to the firm from American Express, Barclays, and Bank of America and are all based in New York. All report to Robert Siverson, vice president of operations at OptionMetrics.

Nasdaq NFX’s head of sales Rick Beaman replaced Magnus Haglind as the chief executive of the commodities market. Haglind accepted the role of chief operating officer of Nasdaq’s global commodities business in Stockholm.

Bloomberg reported Citadel Securities hired Cory Laing from Goldman Sachs to run sales for exchange-traded funds. Laing spent about 16 years at Goldman Sachs, according to his LinkedIn profile, most recently running the bank’s ETF sales.

TradingScreen named Pierre Schroeder as CEO. Schroeder was serving as interim CEO  since May. He has also been a member of the firm’s Board for eight years. TradingScreen’s former CEO, Philippe Buhannic, will no longer participate in the day-to-day management but remains a member of the Board of Directors.

In another CEO move, social finance network StockTwits chose Ian Rosen as its new top dog. Howard Lindzon has assumed the role of executive chairman, and will continue to serve as chairman of StockTwits’ board. Rosen has deep experience in both media and financial technology, having led MarketWatch and having served as CEO of Even Financial, a lending supply platform.

UBS Europe has lured Morgan Stanley alum Chris Blackburn as its new business manager for the its Middle East and Africa cash equities unit, according to a person familiar with the matter. He reports to Karolina Mikołajów, global operating officer for the cash equities business. Mikołajów had also been covering the role for EMEA but that responsibility has been handed to Blackburn. In addition to Morgan Stanley, where Blackburn was an executive director in its equities trading business, his career also includes stints at Jefferies, where he was head of European event-driven sales and trading, and Lehman Brothers, where he ran the event-driven trading desk.

Digital Asset Holdings CEO Blythe Masters, who was previously appointed as Santander Consumer’s non-executive chairwoman last July, has decided to move into a broader role at parent Banco Santander. A champion of bitcoin and blockchain, Masters is now going to lead the bank’s digital banking efforts. In her new roles, Masters will be senior technology adviser and will join the bank’s international advisory board. She also will be on the board of Santander’s online bank, Openbank.

Previous Trading Up columns:

• TRADING UP: Turner Joins Citadel from Microsoft; IEX Adds Donaldson to Board

• TRADING UP: Schroders Promotes Kyrklund; STA Tabs Combs for Planning

  TRADING UP: Citadel Hires Knas in Chicago; CalPERS Names Interim CEO