Arja de Waal currently serves as an Omgevingsmanager at Gemeente Leiden since March 2024, and also holds the position of Senior adviseur at BMC Implementatie since October 2018. Additionally, Arja de Waal has been operating as an MfN registered mediator through Arja de Waal mediation since June 2011, specializing in conflicts within the public domain and has experience with the mediator pool for municipalities in North Holland. Previous roles include Projectmanager for the warmtenet at Gemeente Haarlem, Adviseur Ruimte at Enexis Groep, and Projectmanager at Gemeente Westland, among others, showcasing expertise in project management and sustainability consultancy. Educational qualifications include degrees from Inholland University of Applied Sciences, bestuursacademie HBDO, and various certifications in mediation and NLP training.