Leander Moons founded his own design and project management consultancy company, Leander Moons Inc., in 2019 in New York. As the project portfolio grew rapidly, Leander, together with Andreas Trampe-Kieslich, established OMT Architects GmbH in Berlin in 2021. Both companies work seamlessly together from the concept design phase through the project delivery on-site, with a goal to create and implement sustainable, equitable, and empowering design solutions for building projects. The most recent projects have placed a special focus on the innovative integration of locally sourced, sustainable building materials, particularly timber.

Before starting his own businesses, Leander worked for leading architectural offices in Europe (Baumschlager Eberle Architects), Africa (Bowman Architects Associates), and North America (nbbj). He supervised the Berlin-based team of Baumschlager Eberle Architects and the Nairobi office of Bowman Architects. He has been leading international consultant teams for complex projects around the globe. Leander has contributed to the realization of numerous projects in different building typologies and his works have received multiple architectural awards.