In 1977, Sundah got his breakthrough for winning the "Listeners' Favorite Choice" Award in the Youth Songwriting Competition (Lomba Cipta Lagu Remaja – LCLR) hosted by Prambors Radio.
Sundah was instrumental in the formation of the group Suara Persaudaraan (Voices of Brotherhood) in 1986, which, according to a Rolling Stones article, is considered as the largest "jamboree" of musicians of all times.
With Titiek Puspa, Ahmad Albar, Bimbim Slank, Nicky Astria, Iwan Fals, Doel Sumbang, Franky Sahilatua and the Scorpions, he wrote "When You Came Into My Life", on their 1996 album Pure Instinct.
[4] A staunch advocate against piracy, Sundah is currently Chair of Information Technology Department at the Indonesian Association of Singers, Songwriters and Arrangers (PAPPRI), Indonesia's musician union, is also known an https://web.archive.org/web/20080318004731/http://www.suarapembaruan.com/News/2006/05/22/Editor/edit01.htm.
Creatively, Sundah broke down "edan" as an abbreviation of Electronic – Digital – Angka-angka (numbers) – New norm, explaining that to remain in tune with the world development today, one must adapt to the "new" things which were considered many years back.
He made international headlines in 2009 when he had to re-take his driver's license exam three times because he refused to pay bribes to the officials to get his lost copy replaced.