The new company was announced on 15th January, to begin the investigation into new high speed lines.
Network Rail's chief executive Iain Coucher said: "Our Chief Engineer, Professor Andrew McNaughton, will be seconded to this new company for the next 12 months and will lead Network Rail's contribution to the development of this vital project.
"Other Network Rail staff will be seconded to HS2 as Andrew helps the Department for Transport with its plans for a new high speed line. Andrew's knowledge, experience and expertise, and that of those who join him, will be pivotal if the new company is to be able to make recommendations within the 12 month timeframe announced by the Secretary of State for Transport, Geoff Hoon.
"Andrew will lead the specification of infrastructure and train design, operation and maintenance for the new line, as well as helping to determine its likely route. This includes how the line will connect with, and become an integral part of, the expanding network.
"Andrew has led engineering for the company for over six years and has wide experience of railway operations, engineering and business management throughout his 35 year railway career. More recently he has been influential in shaping thinking about how to develop the future railway, both here, and in Europe."
Coucher also said that McNaughton's shoes would be filled by Jerry England, who arrived at Network Rail in 2007 following a spell at the Highways Agency and a career at Thames Water.