Dan Castles

Executive Chair of the Board Telestream

Last Reviewed: September 26, 2026

Executive Summary

Dan Castles is co-founder and Executive Chair of Telestream, the Nevada City, California company whose software and test-and-measurement products handle video ingest, transcoding, quality control, captioning and live production for broadcasters and media companies. He was its founding CEO in 1998 and has come back to run it twice since: in 2020 after his first successor stepped down, and in December 2024 after he had retired. On 1 July 2026 he handed the CEO role to Benjamin Desbois, a succession Telestream announced in May, and moved to Executive Chair of the Board. He now supports the new CEO and the board on strategy and customer relationships.

Career Highlights

• Co-founded Telestream in 1998 and was its founding CEO.
• Led the company into Genstar Capital’s acquisition, announced in January 2015, after what he called “a long history of growth and profitability over the past 17 years”.
• Came back as CEO in February 2020 when his successor, Scott Puopolo, stepped down.
• Came out of retirement in December 2024 to lead Telestream a third time, bringing former executives back in product, customer experience and finance roles.
• Handed the CEO role to Benjamin Desbois on 1 July 2026 and became Executive Chair of the Board.

Professional Journey

Castles co-founded Telestream in 1998 in Nevada City, California, and was its first chief executive. The company built its name on file-based video transcoding and workflow automation. When Genstar Capital agreed to acquire it in January 2015, Castles described Telestream as “the undisputed leader in file-based transcoding and workflow software”. Genstar, for its part, said the company had “posted profitable growth since its founding”.

He stepped back in 2017, and Scott Puopolo, who had come from Cisco, succeeded him. The break did not last long. In February 2020 Telestream announced that Puopolo was stepping down and that Castles would return as CEO. Genstar’s managing director, Eli Weiss, said the firm was “excited to have Dan rejoin Telestream to help drive its growth strategy.” Trade press put his combined leadership at more than 22 years by the time he retired again in April 2023.

In December 2024 he returned a third time. With him came several former senior executives in EVP roles: Mark Wronski and Charlie Dunn in product, Anna Greco in customer experience and Jennifer Fehrmann in finance, and Sarah Klose was named EVP of Human Resources. Castles described it as “a return to basics, as we navigate the many challenges and dynamics our markets present.” Under his leadership in 2026 the company pushed into AI-assisted workflows, cloud services and IP-based test and measurement, and its Pulse platform won a 2026 NAB Product of the Year award.

In May 2026 Telestream’s board named Benjamin Desbois, its Chief Growth and Strategy Officer and a former executive at Backlight, Avid and Dalet, as the next CEO, effective 1 July 2026. Castles stayed CEO until the handover and then became Executive Chair of the Board. “I am confident he is the right person to lead the company forward,” Castles said, “and I look forward to supporting him and the team in my role as Executive Chair.” Telestream’s leadership page now lists Desbois as CEO.

Education

No education record was found in any first-party or dated press source.