Rob Simopoulos

Defendify is one five founding providers of the newly launched Water Watch Center, which was formed to help small water and wastewater utilities defend themselves against cyberattacks.

Rob Simopoulos, co-founder and CEO of Defendify, sat down with Mainebiz at the company's new downtown office, where staffers monitor — and thwart — cyber threats around the clock.

Even the simplest business concept can grow into a profitable venture with the right effort and execution.

A Portland-based cybersecurity firm made its debut on Inc. magazine's ranking of the country's fastest-growing companies, while the top rank in Maine goes to a repeat performer.