1980’s
In the 1980’s the third generation of Henderson’s joined JJH, Michael in 1981 and David in 1988. During this time JJH started undertaking water and wastewater treatment plant work which continues to be a mainstay for the company today.
In the 1980’s the third generation of Henderson’s joined JJH, Michael in 1981 and David in 1988. During this time JJH started undertaking water and wastewater treatment plant work which continues to be a mainstay for the company today.