Following the start of the full-scale invasion of Ukraine, and after learning that colleagues he had met during a TCCC course in Argentina were fighting there, he decided to travel to Ukraine and contribute to the country’s defense. In February 2023, "Zorou" arrived in Ukraine and joined the 49th Karpatska Sich Battalion, where he served for three months. He later transferred to the International Legion, joining a reconnaissance team. During this period, he operated across multiple sectors of the front line, including areas near Kreminna, Kupiansk, Chasiv Yar, Ivanivske, Andriivka, Staromaiorske, Kurakhove, and Pokrovsk.