No, SLIET is not a Tier 1 college. SLIET is short for Sant Longowal Institute of Engineering and Technology, located in Punjab, India. It was established by the Government of India in 1989 as an autonomous institution dedicated to the advancement of education and research in the fields of engineering, technology, and allied sciences.
SLIET is accredited by the National Board of Accreditation (NBA) and holds an A Grade from the National Assessment and Accreditation Council (NAAC), which is a part of the University Grants Commission (UGC).
SLIET has been consistently ranked among the top ten self-financing institutions in India. However, due to its non-membership in it's UGC, SLIET does not qualify for Tier 1 status. In India, Tier 1 colleges are universities which receive direct grants from the government.
For more information, you can visit the official website of SLIET - http://www.sliet.ac.in/