A longtime Paramount exec is stepping down as David Ellison's company shakes up its ads leadership

David Ellison, pictured left, is the CEO of Paramount, which is losing a longtime ad sales executive who got his start at CBS.

Patrick T. Fallon/AFP via Getty Images; Spencer Platt/Getty Images

• Paramount's EVP of agency partnerships, who's been with the company for decades, is stepping down.
• The move was announced to Paramount advertising employees on Wednesday afternoon.
• Paramount CEO David Ellison has made his mark on the company since taking charge and is implementing a tech-forward vision.