Kenny, 56, takes on the top boss role with effect from 1 October, leaving his job as managing director of Carillion Business Services, the facilities management arm of Carillion, with revenues of £1.2bn.
John Standen, chairman of Lavendon, said: “We are delighted that Don is joining Lavendon as chief executive.
“He brings with him a wealth of experience of improving operating performance and growing businesses successfully both in the UK and internationally, together with a deep understanding of our industrial end markets.
“He is the ideal candidate to lead the group through the next phase of its development and I am confident that he will deliver significant shareholder value.”
In his earlier career, Kenny an accountant by profession held several general and financial management roles in the UK, Far East, Middle East and Scandinavia with the Mowlem group of companies.
As a result of the appointment, John Standen will resume his prior role as non- executive chairman and Jan Astrand will resume his prior role as a non-executive director.