Hussain took 67 Championship wickets at 22.34 for Gloucestershire in 2010
Somerset have signed paceman Gemaal Hussain just eight days after he left Gloucestershire in search of County Championship top-flight cricket.
The 27-year-old Londoner was signed by Gloucestershire in May 2009 following unsuccessful trials elsewhere.
But he had a fine 2010 season, claiming 67 Championship wickets at 22.34.
And, after a narrow failed title bid, Hussain and fellow paceman Steve Kirby, who moved from Nevil Road last month, aim to help Somerset go one better.
"As a developing cricketer, I could not wish for a better opportunity, and intend to give my all," Hussain told Somerset's club website.
"My ambition is to become a successful England bowler, and I believe that the tough challenge of Division One cricket will bring the best out in me over time.
"I like the County Ground at Taunton and, despite the pitches having a reputation for being batsman-friendly, I believe that the challenge of taking wickets in such conditions will enhance my ability to become a future Test bowler."
Somerset director of cricket Brian Rose told the county's club website: "I am delighted that both Steve Kirby and Gemaal Hussain have become available and we have gone into the market and signed them.
"Our stated aim is wanting to win the County Championship.
"That has led us into trying to get a quality squad of bowlers together, which gradually we have done over the last couple of years - as well as developing our own young players.
"To be able to pick a bowling attack from Alfonso Thomas, Gemaal Hussain, Steve Kirby and Charl Willoughby, plus young Calum Hagget coming up on the outside, is something to look forward to."
"Gemaal is a delightful lad, who has got aspirations to become an England bowler. He is tall and got a classical action so he has got every chance.
"He will certainly come to the fore in games played on wickets lacking a bit of bounce like Trent Bridge. In places like that, he is going to be a handful.
"Gemaal has had a tremendous season, most of which has been spent playing Championship cricket, because he has been held back from one-day cricket which is fine and we may even look to do the same thing."