The company, which has offices in Birmingham, Stoke-on-Trent and Bolton, has added a new base in Mold, Flintshire.
As part of its expansion into the region, it has recruited Nikki Waud as a business development manager operating in north Wales and northwest England. She joins from Bullock Construction where she held a similar role.
Nikki Waud said: “Wales represents a key market for Seddon and we are already looking to talk to suppliers and subcontractors. We are also keen to bring Seddon’s training and development ethos to the area.
Managing director Jonathan Seddon said: “Nikki’s appointment is part of a big step for the company as we expand our operations into Wales. Nikki joins us at a very exciting time – 2015 has already seen us take on large contracts, purchase new offices in Birmingham and increase the number of frameworks we are listed on.”