The Castleford-based firm said it expects to see no material impact from the collapse of Carillion.
PTSG takes on around £800,000 of work annually for Carillion and it expects this work will be taken on by existing PTSG clients.
The firm is the UK’s leading provider of facade access and fall arrest equipment services, lightning protection and electrical testing.
John Foley, chairman of PTSG, said: “PTSG delivered a record performance in 2017, driven by strong organic growth and a number of highly successful acquisitions, including the largest acquisition made since the Group’s IPO in February 2015.
“During the year the Group took steps to diversify and reorganise the business, to further strengthen its foundation for future growth.
“Trading in 2018 has started well. We continue to review a number of acquisition opportunities and the Board is confident that the group’s positive organic revenue and profit momentum will continue throughout the year.”