Gamification can be used to effectpositive behavioral change in various fields, including energy conservation.This paper reports on a survey we conducted to formulate a holistic view ofusers’ profiles and preferences in an Internet of Things (IoT)-enabled gamified mobile application that provides personalized energy-saving recommendation tips to employees, towards conserving energy and adopting a more green behavior at the workplace.The collected insight dictates that a gamified app promoting energy saving at the workplace may become a daily habit for its users if it at least includesthree game design elements: progression, levels and points. Additionally, we complementexisting design guidelines about the requirements of each HEXAD gamification user type (Philanthropist, Socializer, Free Spirit, Achiever, Disruptor, Player) in game elements,specificallyfor energy efficiency applications. Thus, we apply and validate the HEXAD gamification user typology in a new context –multicultural workplaces –as well as domain –energy-saving. Moreover, the collected insight inspired us todevise a modular, rule-based mechanism forformulating personalized energy-saving recommendation tips tailored to the users’ profiles and game design choices. This research may assist researchers, as well as practitioners, in designing personalized gamified behavioral interventions, especiallytowardsenergy conservation inworkplaces.