 Lienert-Brown spent the 2017 All Blacks season as an on-off regular starter, replacing another player off the bench eight times and starting for the All Blacks six times in 2017.His 2017 season included a try-scoring performance in his start against Argentina on 9 September 2017, as well as an outstanding performance against Wales in the final test of 2017 where he also scored a try off a pass from winger and man-of-the match Rieko Ioane in the 33-18 victory.The 2019 Super Rugby season proved to be a brilliant return to form for Lienert-Brown, who, despite playing 11 tests during the season, had a quiet 2018, having been usurped by Jack Goodhue in the national pecking order.