Sallerfors has nearly a decade of experience advising investment managers on their communications and has been the associate VP of global external affairs at Carlyle.
She has previously worked at financial communications consultancy Brunswick Group and Kreab Worldwide.
"We are delighted to be welcoming Katarina to the team," Greenbrook managing partner Andrew Honnor said. "She brings a wealth of experience from both in-house and agency roles that will be of significant benefit to our clients in navigating today’s complex and often unpredictable environment."
For Greenbrook, it's another addition from a major global financial services player.
The Carlyle Group has investments in aerospace, defence and government services, consumer and retail, energy, financial services, healthcare, industrial, real estate, technology and business services, telecommunications and media, and transportation.
It has backed several household brands in recent years, including Holland and Barrett, RAC, Dunkin’ Donuts and Beats by Dre.
Previously, the firm was known for its links to Capitol Hill, including the Bush Administration, and was cited in Michael Moore’s film Fahrenheit 9/11.