Crowley joins QPE from MARCOL where he spent four years as an investment director and senior investment associate in the healthcare private equity team.
Monteiro has worked on investments including Bridewell, 101 Ways and Container Solutions.
In addition to the new partners, ECI has also promoted Jin Ni Ooi to the role of investment manager.
Louvet started as an associate with Stanley Capital in 2022.
Quin most recently served as chief executive officer at Medica Group.
Pavletic is part of Jeito's founding team.
Pietro Reho, Luca Daminelli and Damien Marty are among the new private equity hires.
Livingston currently serves as a senior independent director of National Grid and non-executive director of S&P Global.
Aylesh Patel will now become partner and head of South at LDC.
Folleas previously worked at Merieux Equity Partners.