Mr Langman has been managing director of NMC鈥檚 Nomenca subsidiary since 1998. His appointment to the main board coincides with the retirement of Douglas Bleakley.
Mr Bleakley joined the group in 1999 as chairman of Nomenca and was appointed to the board as an executive director in 2004.
NMC chairman Robert Moyle said: "We are very pleased to welcome Andrew to the board. He has been instrumental in Nomenca's growth and brings a wealth of experience to the Board. We would like to thank Douglas for his valuable service to the group over the years and wish him a long and happy retirement."
Got a story? Email news@theconstructionindex.co.uk