Jonathan Ashworth is widely expected to be offered the role of shadow health secretary in Jeremy Corbyn's frontbench, City A.M. understands.
However, in return for the promotion he is likely to need to resign from Labour's National Executive Committee (NEC).
If he does resign, it will pave the way for the influential committee to be comprised of a pro-Jeremy Corbyn majority and would be a way for the Labour leader to strengthen his grip on power after winning last month's leadership contest by a large majority.
The Leicester South MP, who is currently a shadow minister without portfolio, did not step down from the shadow cabinet during the mass-resignation in June shortly after the pro-Brexit referendum result.
Diane Abbott was appointed shadow home secretary, while Jonathan Reynolds was confirmed as shadow City minister and human rights campaigner Shami Chakrabarti has taken the role of shadow attorney general.
Ashworth's office has been contacted for comment. Though the appointment has not officially been confirmed, Ashworth sent out a tweet about the NHS an hour ago, saying the party will be "campaigning hard" for it.
The NHS was and still is Labour's greatest achievement. On the brink of crisis under the Tories & going backwards. We'll be campaigning hard— Jonathan Ashworth (@JonAshworth) October 7, 2016