Home - Karsun Solutions LLC, Karsun Solutions is a premier IT and consulting services company with a culture of innovation. We offer a portfolio of Enterprise Modernization services to both Federal agencies and commercial clients. Our premier clients include the U.S. Department of Homeland Security, the Federal Aviation Administration, and the U.S. General Services Administration. Karsun combines years of institutional knowledge, emerging technologies, and customer commitment to ensure delivery excellence. Our established.