During this time he filed a number of international patents[3][4][5] which were used by developers of the first digital telephone switching equipment in the UK, the US, Canada, France, Sweden and Japan.

In 1973, he joined Logica, an international systems company and was a senior member of team of engineers from Supreme Headquarters Allied Powers Europe, SHAPE Technical Center in the Hague, military personnel from NATO countries and industry defining the communications and IT requirements for the underground Static War HQ to be built near Mons in Belgium.

[6][7][8] INRIA in France, Euratom in Italy, the National Physical Laboratory (United Kingdom), ETH Zurich (Eidgenössische Technische Hochschule Zürich), Polytechnic University of Milan and the Organisation Européenne pour la Recherche Nucléaire, commonly known as CERN, actively participated in the project and it was there that the World Wide Web was conceived by Tim Berners-Lee in 1989.

In 1984, Karney became a main board director responsible for the telecommunications, electronics, space, government and media sectors as well as operations in Italy and Asia, which included he development of the trading system for the new unified Hong Kong Stock Exchange.

He then became a trustee of the Welfare Association (UK) works to support some of the most marginalised Palestinian families and communities in the West Bank and the Gaza Strip and in the refugee camps in Lebanon.

[22] From January 2020, he was a director of Helix Technologies,[23] a specialist developer of compact, high-performance, dielectric-loaded ceramic antennas for demanding telecommunications and navigation applications until the completion of a significant Venture Capital funding round in November 2021.