In 1985 Lenagan set up his own business, Workplace Systems, in Milton Keynes, to develop and supply software products for workforce management. Following its first successful contract with Asda, the business became very successful and expanded abroad to places across Europe, Australasia, the US and the Middle East. Major retailers known to use Workplace Systems include Argos, Focus, Sports Café, Next and Morrisons. With the success of Workplace Systems, the company was floated on the London Stock Exchange in 2000 under the name Telework Systems PLC to incorporate another company founded by Lenagan in 1981, TeleWare, which focused on the telephony software products market.