Darmain is a distinguished partner at Segaran Law Chambers, specializing in technology law. His legal advisory work focuses on compliance and risk management, particularly for projects involving emerging technologies. Notably, he serves as a committee member (Legal) of the ACCESS Blockchain Association of Malaysia. Darmain's expertise extends to data protection and policy development, where he imparts his knowledge through legal training as a Certified Information Privacy Manager (CIPM). His significant contribution includes the development of one of Malaysia's pioneering government-approved pilot programs in the field, the Certificate in Data Privacy & Ethics in 2019. Beyond his legal practice, Darmain actively participates in research endeavors centered on data protection and ethical considerations in AI.