Hamilton is Seddon’s new business unit manager for Scotland and was previously construction director for Rok Building in central Scotland.
He will be based as Seddon’s Glasgow office and will lead the £250m turnover contractor’s continuing expansion in the Scottish market.
Hamilton said: “This is an exciting time to be joining the business in Scotland.
“Seddon is known for delivering high-quality construction schemes and excellent customer service.
“I am committed to building on our existing strengths and to working with the talented Scottish team to generate fresh business opportunities with both new and existing clients.”