Isaac Ongk is a south Sudanese Politician and a Human right Activist/ Lieutenant Colonel for the government in Opposition (IO) since 2012-2021. He is the chairman for the South Sudanese Youth League in opposition and currently he is working As A Youth Justice officer for the Government of Northern territory of Australia. He also worked as Child protection worker Department of Families and children. He worked As the Youth Development Officer for NPY Women Council in Australia and a Business Man.

Isaac Obtained his Bachelor clinical psychology from Queensland University, Advanced Diploma of Management, Diploma Of Business, Diploma of Mental Health, and also Associated Degree In Business and marketing and diploma In Security risk management. Isaac Also was elected as the secretary general for the south Sudanese community in Tasmania in 2010.

Isaac was married to Julian, with two Kids, Gracious and Denny.