Millers boss Justin Gardner has added 23-year-old striker Shane Oakley to his squad ahead of the Ryman One North campaign.
Oakley was a youngster at Leyton Orient and has had spells with both Hornchurch and Concord Rangers in Non League football.
On the signing, Gardner said: “Shane is a player I am very excited to have brought to the club.
“He is a goalscorer I have been chasing since the end of last season. I firmly believe he will be up amongst the top scorers this season.
“I would like to welcome Shane to the club and hopefully it will be a successful spell.”
Meanwhile, new man Oakley said: “I can’t wait to get started and although there were a few offers on the table, I shared the same view as the gaffer.
“I liked what he had to say and hopefully I can repay his faith in me with scoring the goals that will make for an exciting season at Aveley.”