Rozan was a contributor to the documentation of
Bruneian history and customs. He wrote for the "Golden Legacy" section of
The Brunei Times newspaper, focusing on Brunei's past. In addition to his newspaper contributions, Rozan presented papers at various international, regional, and national forums. Taking note of the
oral traditions conveyed by older generations, Rozan documented these accounts in blogs during the 1990s. Rozan later established the website bruneiresources.com, which served as a platform for his articles and other collected information. His research was often based on a collection of Brunei-related literature. He also included works from other academics who provided him with digital copies of their research. As of 2023, Rozan works as an adjunct professor at the Universiti Brunei Darussalam's (UBD) Centre for Lifelong Learning (C3L). He also lectures at the Institute of Policy Studies and the Academy of Brunei Studies. After 30 years in the Bruneian government, where he held several positions including Permanent Secretary at the Prime Minister's Office, he joined C3L in 2017. == Personal life ==