O'Neill founded O'Neill Communications in Princeton in 1986. He introduced his Local Area Wireless Networking, or LAWN, system at the PC Expo in New York in 1989. The LAWN system allowed two computers to exchange messages over a range of a couple hundred feet at a cost of about $500 per node. O'Neill Communications went out of business in 1993; the LAWN technology was sold to Omnispread Communications. As of 2008, Omnispread continued to sell a variant of O'Neill's LAWN system.