Architect John Aubin announced plans for the build-out of a company headquarters at his flagship mixed-use development, Open Square. Aubin is creating a new, custom-designed and custom-built work space in his historic zero-net-energy development in Holyoke. The modern office environment will provide approximately 6,000 square feet of work and meeting space for 25 employees. Current tenant and national healthcare IT consultancy VertitechIT is expanding its presence at Open Square. The new space will also house employees of two sister companies — akiro Consulting, a firm that facilitates medical practice transactions and acquisitions, and BaytechIT, an IT services provider to physician practices, clinics, and non-profit healthcare companies. BaytechIT is a joint venture between VertitechIT and Baystate Health.