Dallas, TX, October 15, 2025: Siepe, a trusted provider of software and technology-enabled services for alternative investment and credit managers, recently announced the hiring of three new senior leaders to bolster and accelerate the delivery and advancement of its end-to-end product, services and data suite, including collateral administration, middle office services, and robust data and software platform, for liquid and private credit managers. Don Nilsson was appointed as Chief Product Officer, Daniel Williams as Vice President of Engineering, and Jerry Sullivan as Director, Sales.
“The increasing convergence of private credit with liquid credit is creating a more complex landscape for managers, driving demand for solutions that can simplify and provide actionable data insights,” said Michael Pusateri, CEO and Founder of Siepe. “We’re delighted to welcome Don, Daniel and Jerry whose deep industry expertise and proven leadership will be instrumental as we continue to innovate and expand our offerings that enable alternative credit managers to scale and make more informed decisions.”
Don Nilsson brings over 30 years of proven success in developing and delivering solutions for large and complex financial information services software platforms. Before joining Siepe, Don served as Chief Product Officer at Addepar, overseeing all aspects of the Addepar platform. Prior to that, he spent over two decades at FactSet Research Systems, most recently as Senior Vice President. In this role, he was responsible for application development across PC, web, and mobile platforms, as well as FactSet’s suite of APIs.
“I’m thrilled to join the Siepe team to shape and advance its product strategy, empowering fund managers to enhance both operational efficiency and portfolio performance,” Don Nilsson said.
Daniel Williams has more than 25 years of experience building technology platforms for the financial services industry. He joins Siepe after spending over two decades in technology focused on the WSO platform, now owned by S&P (fka FCS, IHS Markit), Daniel was instrumental in leading the evolution of one of the industry’s earliest loan platforms into a modern, cloud-based web solution.
“Siepe has continued to help clients surface hidden insights within their data and streamline operations across the credit lifecycle,” said Daniel Williams. “I look forward to building on this work while ensuring our software is robust, scalable, and future-ready.”
Jerry Sullivan brings over eighteen years’ experience across structured finance and capital markets. Before joining Siepe, Jerry was Director at Deutsche Bank in the Trust and Agency Services division, where he oversaw Sales and Business Development for investment managers. Prior to this, he worked at BNY Mellon across Sales and Relationship Management covering the structured finance market.
“It’s great to join Siepe, and be part of a team that is growing and delivering innovative solutions to help fund managers achieve greater efficiencies in structured finance and credit markets,” added Jerry Sullivan.”
The strategic appointments of Don, Daniel and Jerry build on recent significant milestones, including significant customer growth and the opening of new offices in Houston, London, Dublin, and Malaysia – strengthening the company’s footprint in key loan and structured finance centers and providing ‘follow-the-sun’ coverage for liquid and private credit managers.
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About Siepe
Siepe is a leading provider of cutting-edge technology and service solutions tailored to high-yield, private credit and alternative investment managers. Through its cloud-based platform, Siepe offers flexible front, middle and back-office solutions to streamline workflows, scale processes, and transform data into an asset to gain perspective. Siepe’s seasoned specialists provide extensive industry knowledge and support every step of the way. Siepe has a proven track record of supporting top-tier CLO managers, BDCs, private credit funds, structured product investors, and more. The platform leverages technology to reduce risk, gain scalability, and provide a seamless experience for portfolio managers, traders, analysts, and operations to access their data in a centralized format. For more information, visit siepe.com.
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