Arda Işık, a 1998 graduate of the Middle East Technical University's Department of Architecture, founded XL Architecture & Engineering Office in 2004. Since its inception, the firm has delivered comprehensive architectural, interior design, and planning services for a diverse range of projects both within Turkey and internationally. His portfolio encompasses sports and educational facilities, cultural buildings, office and commercial spaces, residential complexes, and mixed-use developments.

Beyond his professional achievements, Arda Işık actively contributes to urban planning and development initiatives through his involvement with various NGOs, serving as a member or board representative. Additionally, he shares his expertise as a guest lecturer at leading universities, inspiring the next generation of architects and designers.