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Halldor Sigurdsson


Coleads our Technology, Media & Telecommunications Practice at the global scale

Halldor is a partner at the Paris office, he previously worked at the Copenhagen office. Halldor is one of McKinsey’s leaders in the Technology, Media & Telecommunications Practice, he is an international reference on infrastructure strategies of large groups in this sector. With in-depth expertise in their growth opportunities—particularly 5G and all applications related to technologies and IoT—he assists his clients in their major investments in networks and equipment.

Having worked with more than 50 clients worldwide, Halldor is involved in the large-scale transformation of major companies. His expertise covers mergers between operators, convergence or sharing of networks, expanding activities toward adjacent services such as cloud or content creation, and enhancing and monetizing assets. He also supports multiple telecom companies around the world on regulatory topics in fixed and mobile.

Halldor also carries out operational transformation projects enabled by technology and innovation in other sectors, such as energy and high-tech.

Prior to joining McKinsey, he worked at Microsoft Research Asia and in the research and development department of Iceland Telecom.

Published Work

Reinventing telco networks Five elements of a successful transformation, ”McKinsey & Company, January 2019

The road to 5G: The inevitable growth of infrastructure cost,” McKinsey & Company, February 2018

Network sharing and 5G: A turning point for lone riders,” McKinsey & Company, February 2018

Regaining mobile’s grip on network connectivity,” McKinsey & Company, August 2017

Past Experience

Industrial PhD partnership

Microsoft Research Asia
Guest researcher

Iceland Telecom



Technical University of Denmark
PhD, telecommunications (engineering and economics)

Technical University of Iceland
BS, industrial engineering