NEW YORK CITY — Two construction management firms with offices in the Northeast will become part of the same operation on July 1. That’s when Consigli Building Group, a $1.6 billion company with five regional offices, acquires New York City-based T.G. Nickel & Associates. The acquisition will allow the new entity, which will be branded as Consigli, to take on new types of projects in the healthcare and academic spaces. Once the deal closes, Nickel CEO Thomas Nickel, who founded the company in 1998, will become CEO of Consigli’s New York City Metro Operations. Nickel co-founder Joseph Chiarelli will be promoted to president of the company’s New York City operations.