Fernanda Romano joins from DM9DDB Brazil, while the creative directors John Hobbs and Peter Rosch join from Bartle Bogle Hegarty New York.
All three will hold the position of executive creative director and will report to the Lowe New York chairman and chief executive, Mark Wnek (pictured).
Romano has won seven Cyber Lions in the past year, helping DM9DDB to win the Cannes Interactive Agency of the Year this year.
Hobbs and Rosch were joint creative directors at BBH New York. The pair have won awards for work on Levi's and Axe.