Rajitha, 31, has represented Sri Lanka in all three formats, including 18 matches at Test level, where he has taken a total of 55 wickets at an impressive average of 29.58. He recorded his best Test bowling figures of 5/56 last March in a win against Bangladesh.
The seamer made his Test debut in June 2018 in Gros Islet against the West Indies, taking a total of five wickets, which included Jason Holder, Kraigg Braithwaite, Devandra Bishoo and Devon Smith.
Rajitha played under Essex Director of Cricket, Chris Silverwood, during his tenure with Sri Lanka from 2022 to 2024, and has recently been featuring in Sri Lanka’s first-class format for Colombo.
“We are delighted to welcome Kasun to Essex and very much look forward to watching him perform in the County Championship,” said Chris Silverwood.
“I know his experience and skill set will certainly help strengthen our already superb bowling attack.”
On signing for Essex Cricket, Kasun Rajitha said: “It is a really proud moment for me to be joining Essex.
“I have followed the team over the years, and they have always produced excellent and entertaining first-class cricket.
“I am joining a strong bowling unit and look forward to contributing on the field and helping the team win matches.
“I would like to thank Chris Silverwood for giving me this opportunity and Sri Lanka Cricket for allowing me to further hone my skills.”
Kasun will wear the number 65 shirt and is set to be named in the squad against Worcestershire this weekend.