宏船长老成立扩建护法团，扩建光明山普觉禅寺，并兴建了大悲殿、钟鼓楼、甘露戒堂、藏经楼、长廊、功德楼、普安塔、禅楼等。他从1970年开始，用10年时间把光明山普觉禅寺扩建成规模宏大、寺院壮观道场。
宏船长老在1974年荣任菲律宾信愿、华藏二寺上座。他以新加坡佛教总会主席，在1978年主祭裕廊造船厂内在施工的油槽船“史拜罗斯”号爆炸，启建全国佛教徒祈祷超荐法会。光明山修身院在1980年落成。
Under Venerable Seck Hong Choon’s leadership, the KMSPKS Buddha-dharma Volunteer Group was set up and KMSPKS embarked on an expansion plan which eventually led to the construction of the Hall of Great Compassion, Bell and Drum Tower, Hall of Amrita Precepts, Dharma Hall, “Long Corridor” (长廊), Ancestral Hall, Pu An Columbarium, and Abbot’s Hall, among others. From 1970, Venerable Seck Hong Choon spent a decade expanding and reinvigorating KMSPKS into a magnificent sanctuary for Dharma practice.
In 1974, Venerable Seck Hong Choon accepted the invitation to become the Venerable Elder (上座) of two Buddhist temples in the Philippines, Xinyuan Temple and Huacang Temple. As the President of the Singapore Buddhist Federation (SBF), he initiated a mass joint prayer for the deliverance of departed victims of the Jurong “Spyros” ship disaster. In addition, the construction of Bright Hill Evergreen Home was completed in 1980.