Graff Company ULC, a subsidiary of the Penhall Company, is a leading service provider in the Ontario construction service ind ... ustry. Graff is committed to several fundamental core values: • To invest in the ongoing growth and development ofeach Team Graff member • To provide clients with dedicated, personalized customer service • To make safety a value by creating and working in safe environments • To meet and exceed our client’s expectations through teamwork, innovative technology and diversified service read more