>After relocating to New York City, Mashinsky ran a business trading contracts for delivery of chemicals such as urea, gold, and sodium cyanide. However, after the Tiananmen Square protests of 1989, the business slowed as exports of sodium cyanide from China fizzled. Mashinsky then worked at A+ Systems, a computer-based voicemail software company for phone carriers.
Mashinsky's company Q-Wireless is one of the four companies that made up Transit Wireless, a joint venture to install wireless cellphone and free Wi-Fi internet service in the New York City Subway system. It took Mashinsky three years to convince Metropolitan Transportation Authority to initiate a survey to determine if there was a demand for cell phone service inside the subway system and two more years for the authority to request a proposal. By 2010, his company had received a contract to install the service at 277 below-ground subway stations in New York City.