CORE | 29,797 followers on LinkedIn. CORE is a Construction Manager-at-Risk, Design-Build, General Contracting, Program Management, and Job Order Contractor with over 1,200 employees providing annual revenue in excess of $1.5 billion. CORE has a proven track record of providing exemplary services to a wide range of clients in the K-12, municipal, higher education, healthcare, and public safety markets. We have over 25 offices across nine states and a history reaching back over 85 years.