Greg Antonopoulos joined Siena Construction as director of operations. He will coordinate and oversee project development, cost management, and project scheduling. Antonopoulos is an industry veteran with 40-plus years of construction and engineering experience. Previously, he served as project executive at Suffolk Construction and William A. Berry & Son, Inc. Looking across the Boston and Cambridge skylines, it's easy to spot a distinguishing building or landmark project that Antonopoulos has had a hand in developing. Highlights include: Fenway Park renovations, Brigham and Women's Hospital Channing Labs, McLean Hospital, The Broad Institute's 75 Ames Street expansion, MIT's Koch Institute for Cancer Research, Harvard University: Widener Library, and Center for Government and International Studies, Mass. College of Pharmacy and Health Service, Hilton Hotel (Back Bay) and Sonesta Hotel (Cambridge) and 675 West Kendall St., Building A. Siena's president Terrence Hayes believes Antonopoulos's professional achievements and priorities compliment Siena's goals. "We're happy to welcome Greg onboard," Terrence said. "He has a proven history of excellence in project development. He has an enviable reputation with a proven track record of success in completing complex projects on time and within budget." "I believe the high quality of service we provide our clients sets us apart in the industry," Hayes said. "Greg's professionalism and thoroughness will enhance development in each phase of construction, from the conceptual through completion." Antonopoulos will continue to develop and expand Siena's professional partnerships with the organizational skills and attention to detail that he is known for. He will also be heavily involved in preconstruction with his strong background in estimating and engineering. Antonopoulos holds degrees in Civil Engineering Technology and Architectural Engineering from Wentworth Institute of Technology, as well as various professional registrations, including OSHA and HAZMAT Certifications.