Dhanushka Mitipolaarachchi produced a crucial match-winning display for Billingshurst on Saturday.
The Sri Lankan took five wickets before hitting an unbeaten 92 as his side clinched a second straight Premier Division success.
Billingshurst secured a tight two-run victory over Horsham last time out and by following that up with a five-wicket triumph over Brighton & Hove, have given themselves a solid chance of retaining their place in the top flight.
The victory saw them climb up two places to sixth in the table after being promoted last season.
Skipper Ben Williams said: “It was great to secure a second straight win. We have been playing some really good cricket of late but we were not rewarded with victories in a couple of matches previous.
“However, in the past couple of weeks our performances have been matched with wins.
“Dhanushka is quality and his class shone through once again on Saturday. But I think the way that Will Fazakerley performed with the new ball was exceptional. He is just 17-years of age and is growing as a player each week.
“All of the side deserve huge credit for this victory.”
Brighton & Hove won the toss and they elected to bat first at the Jubilee Fields.
They struggled early doors and found themselves 40 for two after Sam Grant (14) and Bryce Hounsome (seven) went cheaply.
Alasdair Wilson was the top-scorer for his side as he made 34 from 51 balls.
Number eight Jack Chopping was the next highest scoring bat with 29, while Adam Mates struck 20 before they were dismissed for 183 in 41.3 overs.
Mitipolaarachchi led the bowling attack with figures of 5-26 with former Worthing young gun Will Fazakerly claiming three wickets.
Billingshurst were in real difficulty in their reply as Stuart Barber (eight) and Scott Stratton (13) went to leave them 35 for two.
Tom Nightingale then joined Mitipolaarachchi in the middle and the pair shared a third-wicket stand of 56.
Nightingale fell for 29 but Mitipolaarachchi remained to end the innings not out on 92 and guide his side to 184-5, giving them a five-wicket win.
Billingshurst host second-placed Middleton in the league on Saturday.
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