Jenkins was selected by the Green Bay Packers with the 44th overall pick in the second round of the 2019 NFL draft.[3] He signed his four-year rookie contract on May 13, 2019,[4] worth $6.782 million.[5] After entering his rookie season as a backup, Jenkins made his first NFL start on September 22, 2019, in a Week 3 game against the Denver Broncos, replacing an injured Lane Taylor.[6] On 571 pass-blocking snaps this season, Jenkins did not allow a single sack. He was named to the PFWA All-Rookie Team.[7] In the 2020 season, he started in all 16 regular season games and both postseason games for the Packers.[8] For the 2020 season, he earned his first Pro Bowl nod as a starter.[9]
Jenkins entered the 2021 season as the Packers starting left tackle in place of an injured David Bakhtiari. He started eight games there before suffering a torn ACL in Week 11 of a 34–31 loss to the Minnesota Vikings.[10] The Packers placed him on injured reserve two days later, ending his season.[11]
On December 23, 2022, Jenkins signed a four-year, $68 million contract extension.[12][13] In the 2022 season, he appeared in and started 15 games.[14] He was named as an alternate to the 2023 Pro Bowl.[15] In the 2023 season, he appeared in and started 15 regular season games and both of the Packers' postseason games.[16]