Toby Melville/Reuters Despite declining revenues across the ad industry, the biggest agencies are still hiring. Healthcare remains a hot area, with Omnicom Health Group listing almost 600 open roles on Glassdoor. Other areas for job opportunities include media, strategy, and data and analytics. Advertising companies have struggled as the pandemic and downturn led brands to pull back on marketing in 2020. IPG and Dentsu, for instance, reported year-over-year organic revenue declines of 6.5% and 11.1%, respectively, as the coronavirus caused clients to cut spending and event cancellations. Still, Insider identified hundreds of open positions on Glassdoor at the five biggest ad holding companies — WPP, Publicis Groupe, IPG, Omnicom Group and Dentsu — some of which are expected to pay six-figure salaries.