Lukošiūnas started his professional career signing with Ežerūnas Molėtai. After impressive 2017–18 season with Ežerūnas, Lukošiūnas was invited to BC Šiauliai.
On 30 October 2023, Lukošiūnas joined the Salt Lake City Stars after being selected in the first round of the 2023 NBA G League draft.[2] However, he was waived on 28 December.[3]