He first ventured into acting in Gila-Gila Remaja, a 1985 film about youngsters in Malaysia alongside his cousin, Faizal Hussein as the lead role. After acting in several films, he got his first leading role through Suami, Isteri, dan... in 1996. He is known for his versatility in acting and has since then garnered many awards in Malaysia's film industry.
Personal life
Rosyam married Runika Mohd Yusoff in 1989 and has five daughters. He became a grandfather in 2014. His father, Shamsuddin Mohd Yusof died on January 26, 2008 due to kidney failure and pneumonia.
In 2017, Rosyam was criticized and blamed for failing to carry out as moderator task fairly and efficiently at the Transformasi Nasional 2050 dialogue session for the entertainment industry with Najib Razak at the prime minister's official residence at Putrajaya which saw him mishandling a scuffle between film producer David Teo and comedian Sulaiman Yassin, better known as "Mat Over". Rosyam amid being embarrassed and had to apologise personally to Najib, remained boastful of his own credibility by claiming that Najib was fond of himself as the event emcee. After the downfall of Najib Razak and Barisan Nasional in the 2018 general election, a boycott was called in the social media towards newly opened supermarket on 1 June, ST Rosyam Mart in Setiawangsa, Kuala Lumpur, said to be owned by Rosyam who was widely known as a supporter of the disgraced ex-prime minister. But in January 2019, allegations that Rosyam has never fully own and he is just an ambassador of the supermarket started to be viral in the social media. He was slammed for becoming the "barua Cina" or Chinese stooge made use by the Sri Ternak Group's Ho Ah Chai, the real owner of the supermarket to attract and deceive its customers. Only a month later after the viral accusation, he finally and publicly admits he is just a minority shareholder owning merely 10 per cent shares in the ST Rosyam Mart supermarket. Rosyam was again embroiled in political polemic of both divides where his dignity and even business ventures were in questions when a visit was arranged for the new Pakatan Harapan government Minister of Agriculture and Agro-based Industry, Salahuddin Ayub ahead of an official event to the jackfruit farm and fish pond owned by him in Lanchang, Pahang on 16 April 2019.
