Complex sentence: His father, Dr. Alagappa Alagappan, worked at the United Nations in the Natural Resources and Energy Department and was the founder of the Hindu Temple Society of North America and the very first traditional Hindu Temple in United States.
Split into simpler sentences: His father, Dr. Alagappa Alagappan, worked at the United Nations in the Natural Resources and Energy Department. Dr. Alagappan was also the founder of the Hindu Temple Society of North America and established the very first traditional Hindu Temple in United States.