He began his career with Texas Instruments, beginning as an engineer in 1985 and spent 13 years ascending the corporate ladder before becoming Director of Operations of the Singapore plant from 1996 to 1998. After his stint with Texas Instruments, Singh began a career of entrepreneurship, in which he started six businesses after leaving the corporate arena. He founded the United Test and Assembly Center, a semiconductor firm, in 1998 which became a Unicorn valued at US$2b in 2001. The venture was mostly funded by Taiwanese friends of his due to what he terms "a dearth of willing investors and a general disbelief that he would be able to achieve his dream of creating a homegrown multinational firm.". He raised a record of US$138m, all at one go, at the seeds stage in 1998. Inderjit left UTAC in 2001. The firm was listed on the Singapore Stock Exchange in 2004. Around the same time he started UTAC, he started, Tri-Star, which he started with his brothers as trading and services firm, in which much of his and his family's savings were used to fund the company. Today Tri Star is present in 38 countries in Africa as a distributor of Consumer Electronic products. Inderjit subsequently also set-up semiconductor engineering firm Infiniti Solutions in 2001. Infiniti at its peak had operations in the Silicon Valley, USA, in Austin Texas, a factory in Philippines and with the HQ in Singapore. More recently, he founded Solstar International, a Singapore-based consumer electronics products company, of which he is currently the CEO. Solstar is a Singapore based Consumer Electronics brand selling in 25 countries in Africa and other developing countries around Asia. In 2009, Inderjit, helped start Urah Transdermal,a Singapore based Life-Science Research and product Company that has Developed and patented technologies for the delivery of active molecules through the skin barriers to biological targets. He is a Co-President of the World Entrepreneurship Forum, a global organisation on entrepreneurship development. He has also been actively driving the transformation of the entrepreneurship landscape and helping to shape policies to better support start-ups, small and medium businesses in Singapore and has been a board member of Spring Singapore and Vice-Chairman of the Action Community for Entrepreneurship. He was also a board member of the Urban Redevelopment Authority for 8 years where he also Chaired the Audit committee of URA. Inderjit is currently a member of the Board of Trustees of the Nanyang Technological University and also is the Chairman of the board of NTUitive, the Innovation company of NTU. He is also the Chairman of the Alumni and Development committee, a board committee of NTU. He is also a member of the International Advisory Panel of EMLyon, a premier business school in France. Inderjit is a board member of the World Business Angel Forum. Inderjit was appointed as a Adjunct Professor by the Nanyang Technological University, College of Engineering in 2019. He is the author of the popular book, "The Art and Science of Entrepreneurship", which captures his entrepreneurial experiences. He received the Nanyang Distinguished Alumni award in 2011 from NTU and was awarded the Public Service Medal in 2016 by the government of Singapore as part of its annual National Day awards. He received the Strathclyde Alumni Distinguished Entrepreneur Award in 2013
