Stelac’s managing partners have extensive experience having been involved in multiple mergers, acquisitions, financial restructuring, and start-up operating companies.

Stelac is led by two seasoned professionals 

Charles de Viel Castel
Managing Partner

Before founding Stelac, Mr. de Viel Castel was a Director and Head of Sales Management for Private Wealth Management Latin America for Deutsche Bank.

Before, Charlie worked at Goldman Sachs in the Latin America Corporate Finance Group in the Investment Banking Division, where he focused on mergers and acquisitions and financial restructurings.

He holds a BA with dual concentration in Economics and International Relations from Brown University.


Carlos M. Lopez-Oña
Managing Partner

Before founding Stelac, Mr. Lopez-Oña was an independent private equity and venture capital professional focused on small to medium sized companies. Prior to that, Carlos was the COO and Executive Vice President in charge of operations for, Inc. and the founder and CFO/COO of DietSmart, Inc. He also co-founded and acted as COO/CFO of UdefineU LLC.

Carlos worked as a private equity associate at BT Capital Partners (Bankers Trust) and as an analyst in the Latin America Corporate Finance Group at Chase Manhattan Corporation. He holds an M.B.A. from NYU and a B.S.E. in Entrepreneurial Management and Marketing from the Wharton School, University of Pennsylvania.

Recent Testimonials

"As an early stage company looking to launch cutting edge technologies, working with Stelac has been incredibly valuable. Beyond the financial support, Stelac has proven to be smart money. Stelac's guidance, relationships, counsel and insights have been vital to our growth and has helped solidify our future." – Jim Demitrieus, CEO eyeLock Inc.

"Stelac has been a fundamental partner, providing not only capital but also strategic insight which combined, have allowed us to pursue aggressive goals and consistently deliver impressive results." – Vinicius Marchini, Founder of Brilia

"Charlie and Carlos have been instrumental partners to Augeo as we have moved through several years of accelerated growth. Their contributions are consistently thoughtful, relevant and always constructive. Simply put, without their financial and strategic support, we would not be on the growth trajectory we are on today." – David Kristal, CEO of Augeo Marketing

"It is so refreshing to work with Carlos, Charlie and the other Stelac companies. It is the other intangibles that make our relationship a successful one. They approach each business with a unique perspective of conservative business practices and a support for the creative and innovative principles that it takes to be a true entrepreneur and leader in today's challenging market." – TimMcCallum, President and CEO of Razemedia