Sterling Trading Tech taps ex-Exegy Brendan O’Sullivan as COO
“Given the range of initiatives currently underway and planned for the near term, he will bring focus and discipline to current activity, with an eye towards building the infrastructure for future initiatives. Both clients and the industry will benefit from these initiatives, additional announcements to come in Q3.”

Sterling Trading Tech (STT) has appointed Brendan O’Sullivan as Chief Operating Officer of the provider of proprietary order management systems, risk and margin solutions, and trading platforms.
Brendan O’Sullivan joins STT after serving as the Global Head of Managed Services at Vela (now Exegy), where he led a team of engineers in software deployment, change management, and global market data. Prior to that, he was Managing Director of Managed Services at NYSE Technologies.
The industry veteran, who will be responsible for leading STT’s operational management through its upcoming phase of maturity, is the latest C-level executive to join the company. Jennifer Nayar was appointed CEO last year, as well as Jeff Marston as CTO, and Keith Cacciola joined as Chief Customer Officer at the beginning of 2023.
Earlier this year, FinanceFeeds spoke with Keith Cacciola at FIA Boca 2023 about STT’s Risk & Margin system at a time of uncertainty in markets.
“He will bring focus and discipline to current activity”
With over 100 clients including leading brokers, clearing firms, and prop groups in over 20 countries, STT provides trading technology solutions tailored to clients’ needs, including trading platforms, OMS, and risk products covering equities, equity options, and futures markets.
Brendan O’Sullivan’s appointment addresses the firm’s operational resources needs as it grows via the restructuring of and expansion in products, technology, client segments, asset classes, and global reach. Based on his experience and expertise, he will architect and orchestrate the implementation of the plans, while migrating current operations.
Jen Nayar, President & CEO at Sterling Trading Tech, commented: “Brendan brings broad experience and deep operational expertise, and the COO position is now essential to our executive leadership as we grow Sterling. Given the range of initiatives currently underway and planned for the near term, he will bring focus and discipline to current activity, with an eye towards building the infrastructure for future initiatives. Both clients and the industry will benefit from these initiatives, additional announcements to come in Q3.”
Brendan O’Sullivan commented on the appointment on LinkedIn. “My career has presented many twists and turns alongside some of the most brilliant people in the industry, and today I’m thrilled to share that I’m starting along a new road with Sterling Trading Tech as their COO. They have an eye on growth for 2023 and beyond, and I look forward to enabling future momentum in this role. I want to give a big shout out to the fantastic team at Sterling for the warm welcome and my sincere thanks to my former colleagues and clients who were there along the way to help me land where I am today.”