More successful in limited overs cricket, Chilaw reached the final of the International 20:20 Club Championship in 2005.

Brother Edwin Ambross who at the time was the Principal of St Mary’s College, Chilaw, together with a group of cricket loving enthusiasts, namely Shanthi Seneviratne, Edward Gamini, Dinesh Fernando, Rohan Fernandopulle and Bertram Navaratne.

In 1998 Chilaw Marians was able to secure their first title, becoming BCCSL Under 23 Division II Champions.

Encouraged and energised by this achievement, the club set its sights on the pinnacle of 1st class cricket in Sri Lanka – Division I.

In the year 2000 Chilaw Marians won the Premier Division I Qualifying Championship and were promoted to the highest level of club cricket in Sri Lanka.