Sadik is a Distinguished Professor and Chair in the Department of Chemistry and Environmental Sciences at the New Jersey Institutes of Technology (NJIT). She has held appointments at Binghamton University, Harvard University, Cornell University, and the Naval Research Laboratory. Sadik conducts innovative research at the convergence of biosensors and nanostructured membranes. She is the author/co-author of ~200 scientific publications and has given over 400 invited lectures and conference contributions worldwide. Sadik holds five U.S. patents and in biosensors and sustainable nanotechnology.

Sadik was the inaugural President and Co-founder of the Sustainable Nanotechnology Organization (SNO). This 501(C) (3) non-profit entity focuses on advancing sustainable nanotechnology worldwide through education, research, and the promotion of responsible use of nanotechnology. Through this platform, she is building support for science, promoting the understanding of its broader relevance to society, and encouraging more informed decision- making at all levels. She is also making science accessible to lay audiences that traditionally have been excluded from the process of science.

Sadik is a Fellow of the American Institute of Medical and Biological Engineering, the African Academy of Sciences, and the Royal Society of Chemistry.