Pinkelman debuted for the United States sevens team at the 2016 Wellington 7's, and quickly cemented himself in the team with his tireless work rate and expert work at the breakdown. Pinkelman was the youngest player selected for the U.S. Olympic men’s rugby team at the 2016 Summer Olympics in Brazil, and started all five matches for the Eagles. Pinkelman's strong performance at the 2017 Hong Kong Sevens, especially in defense and at the breakdown, earned him his first Dream Team honors . At only 23, Pinkelman captained the USA 7s side at the 2018 USA Sevens, in Las Vegas, where he led the U.S. to its first HSBC World Series of Sevens tournament win on home soil. Ben also earned his second Dream Team honors from his performance in the USA's tournament win. In 2019 Pinkelman started the year off strong securing Dream Team honors in the Hamilton, New Zealand leg of the 2018/2019 World Series by securing inclusion in his third Dream Team. Pinkelman's strong work again earned him Dream Team honors in Las Vegas, and led the Eagles to their second consecutive tournament win at home. Pinkelman's exceptional performance throughout the 2018/2019 season led the USA to a 2nd place finish for the overall series, their highest finish on the World Series ever, and garnered Pinkelman a 2018/2019 Season Dream selection confirming his status as one of the best rugby players in the world. Pinkelman's current HSBC World Series of Sevens stats are and more about his 2018/2019 season is . Pinkelman sat out the first two tournaments of the 2018–20 Series as part of his recovery from the 2019 Rugby World Cup. He made an impact upon his return to the third and fourth legs of the Series in New Zealand and Australia, earning selection to the Dream Team for the 2020 Australia Sevens.
U.S. national fifteens team
Pinkelman's strong performance on the World Rugby Sevens Series led Gary Gold, the Head Coach of the USA Men's 15s Eagles, to request Pinkelman to join the U.S. national fifteens team as a loose forward in the team’s preparation for the 2019 Rugby World Cup in Japan. Pinkelman made his debut for the national fifteens team on August 2 in a win against Samoa at the 2019 World Rugby Pacific Nations Cup. Pinkelman's performance in the Pacific Nations Cup earned him selection to the 2019 . He was selected for the World Cup squad despite the fact that he did not play the fifteens version of rugby union for three years prior to his selection to the team in the lead up to the World Cup. At the World Cup, he was not named to the match day squad for the opening match, but he did play in all three of the U.S. team’s remaining matches as a second half substitute.