The 22-year-old American began training with the MLS club on Monday, according to local reports.
According to BigAppleSoccer.com, the US Under-23 international has linked up with the New York Red Bulls this week and is now training with the team ahead of the opening of the league’s summer transfer window next month.
Born in Concord, Massachusetts, to an English father and American mother, Packwood left the States in 2007 to join Birmingham as a trainee, before progressing though the club’s ranks to earn his first-team debut in March 2012.
He would to go on to make 21 total appearances for the Blues over the following three seasons but saw his progress disrupted after suffering a serious leg break in 2013 that sidelined him for several months.
Having struggled to break back into the first-team following his return, the American centre-back was released last month after featuring just once during 2014-15 campaign, before later heading back across the Atlantic to join hometown club New England on trial.
A permanent deal with the Revs failed to materialise but their Eastern Conference rivals have now given him another chance to earn an MLS move, with Red Bulls head coach Jesse March looking to add depth to his side's backline.
Aged 22, Packwood has been well-regarded in the US national team setup for some time and even earned a senior call-up in March 2014, when he was unused substitute for a 2-0 defeat to Ukraine.
The free agent, who can also operate at right-back or defensive midfield, has been competing at the Toulon Tournament with the Under-23s this summer but he now needs to find a club where he can start to get regular games to keep himself on Jurgen Klinsmann’s radar.
The Red Bulls themselves have some solid centre-backs at their disposal in Damien Perrinelle, Ronald Zubar, Matt Miazga, Karl Ouimette and Andrew Jean-Baptiste but, considering Packwood’s potential, he could well prove a better option than several of those names if he can keep clear of injuries.