Mullan made his Warriors Premiership debut in 2007.
Worcester Warriors' prop Matt Mullan has signed a new two-year deal to keep him at Sixways.
The 22-year-old was named in the England Saxons' EPS squad in July and was due to be out of contract at the end of the season.
Director of rugby Mike Ruddock told BBC Hereford and Worcester: "Not only has he become a first team fixture, he is a superb role model and leader.
"He has become an integral part of developing the 'Worcester way'."
A product of the Warriors' academy, Mullan first came to prominence in 2007/08 when he made 25 appearances for the side, followed by 24 matches in 2008/09.
"We are absolutely delighted to announce that Matt has signed a two-year contract extension to stay at the Warriors," said Ruddock.
I feel I have grown alongside the club as both a person and a professional player
Worcester Warriors' Matt Mullan
"His unfortunate hamstring injury has probably delayed his international progress in the short-term.
"However I have no doubt at all that over the medium to long-term, Matt will go on to achieve a number of international caps and quite possibly could even become a Warriors and England captain of the future."
Mullan, who can play at loose-head prop or hooker, said: "I feel I have grown alongside the club, as both a person and a professional player.
"The club shares my ambition for the future and I'm excited by the plans that have been outlined by Mike Ruddock and his backroom team to take the Warriors forward in both domestic and European competitions.
"Now I have agreed this deal I can continue my development under the guidance of the coaching team, including Tony Windo who has played a key role in my recent success."