Holliston, MA Colantonio Inc. continues to expand with its recent hire of assistant superintendent Justin Ryan and assistant project manager Alex Joyce.

Ryan joins the firm with 14 years of commercial construction experience as an assistant superintendent and engineering technician with former employers Cranshaw Construction and GZA GeoEnvironmental. He earned a B.S. in Construction Management from Wentworth Institute of Technology.

Joyce earned a B.S. in Environmental Science from the University of Massachusetts in Amherst. He brings three years of project management experience in the A/E/C industry with former employers Creative Systems, Air Barrier Solutions and New England Hydropower.

“We are pleased to welcome Justin and Alex to our team,” said Colantonio president George Willwerth.  “They are solid professionals who fit right in.”