There's tons of hiring activity in media ad sales right now, but there's a catch

• Xumo, T-Mobile, and Netflix are hiring new ad sales leaders amid industry turmoil.
• Legacy media companies face a rapid decline in linear TV and slow streaming growth.
• Tech platforms like Google and Amazon are still hiring, but want digital expertise.

In an industry known for its volatility, advertising veterans say theirs is greater than they've seen in years.