A tall and dominating centre-back, Mitchell, 19, signed for the Lions in 2018, before rising through the ranks, impressing in both the U18’s and U23’s.
This experience was furthered last season, when he joined National League side Bromley on loan in April.
Despite a late arrival to the team, Mitchell cemented himself as a starter, and impressed in his 11 appearances, which included a start in their narrow play-off quarter-final defeat to Hartlepool United.
Mitchell made his senior debut at The Den in their Carabao Cup win over Cambridge United, and is highly rated within in the Millwall set-up.
“It’s a brilliant opportunity for me to play in the Football League, and to join Orient who are a massive club.”
“It’s also a big manager who I’ll be working under, so I’m absolutely buzzing for this opportunity.”
A 6ft 3 defender built big in stature, Mitchell’s experiences have him in good stead for the step to the Football League.
“I got called a robot the other week, I also get meathead… it’s funny, but look I like to defend. I might be old fashioned in that way, but defending is my primary goal.”
“I might be old fashioned in that way, but defending is my primary goal.”
“I was really impressed with what he did last year in the National League at Bromley, and with Alex any way. This is a natural step up for him to come into the Football League.”
O’s manager Kenny Jackett was delighted to get the man on loan from his former club, having looked to bring him in earlier in the summer.
“We did enquire earlier in the window for him,” said Jackett. “He was held back, covering and playing in a very strong Millwall side. Now they have players available and can release him, and we’re delighted he has chosen us.”
The new defender will wear the number 15 for The O’s, and bolsters the defensive options for Kenny Jackett’s side heading into September, which starts with a trip to Newport County.
Tickets are on sale now for this game, whilst streaming will also be available in the UK.