By Henry Deacon (@H_Deaconmedia)
Beckwith comes to Westleigh Park having been released from Sutton United, meaning the pair will link back up with each other from their days at Gander Green Lane.
The vastly experienced central defender has won the National League South on two seperate occasions having done so in 2014 with Eastleigh and 2016 with Sutton.
And Doswell cannot wait to bring Beckwith in to bolster his plans for his first season in charge.
He said: "I'm delighted to get that signing over the line.
"When I knew that Dean wasn't going to be offered a contract by Sutton, I was straight on the phone to him, a very easy conversation because I know him well and he knows me well so he will do very well for this Football Club that's for sure."
Doswell believes that Beckwith will bring a number of different qualities into the mix to bolster our options next season.
"He's a very good organiser, he's a leader in the dressing room and is a very good Conference National centre half.
"He's worked for me for nearly four years now and you can count the mistakes on your fingers really and he'll bring that experience and a real calmness to the backline."
His experience could be key in The National League South next season as the competition in England's sixth tier is growing stronger and stronger season after season.
And that is something which the Hawks boss is keen to try and implement alongside his aim to develop a young crop of players into the first team.
"I think it's massive (his experience)." - Doswell said. "When you look at our team last year, they lacked a bit of experience, lacked enough players with the nouse to see them over the line.
"One of the things that we will need, whatever league you're at in The National League, South or National, you need experienced players.
"That's one thing we are going to bring into this football club is good experienced players, but mixing them up with some good young players as well.
"I enjoy working with young players; I'd like to be in a position to improve them during the week and hopefully give them the opportunity to go into league football themselves.
"It will be a nice mixture between young, hungry players and hungry experienced players."