Simulations Plus makes software to predict how a drug will interact with chemicals in a living organism. John DiBella joined the Lancaster biotech software firm right out of graduate school in 2003. His first assignment was to write computer source code; later, he conducted training seminars for clients and performed consulting work. In 2010, he took on a role in business development, eventually leading marketing and sales for the company. He was named president of the Lancaster facility in 2017.