Management Team


Michael Tennyson


Michael Tennyson, Chief Executive Officer and founder of Green Field Construction Group, is a well-established veteran of the residential and commercial construction industries. During his professional career, Mr. Tennyson has lead numerous large-scale, high profile projects in major cities across the globe, including New York, London, and Dublin. As C.E.O. of Green Field Construction Group, Mr. Tennyson’s unfaltering leadership has been the existential key to the company’s wide spread success.

Prior to founding Green Field Construction Group, Mr. Tennyson served as C.E.O. of Anlar, a construction management firm focused on commercial development in New York and New Jersey. Preceding Anlar, he held dual Principal positions with Global Facilities Group and City Construction, both of which are based in New York and London. Earlier in his career, Mr. Tennyson acted as Director of Facilities Worldwide for Jefferies & Company (N.Y.C.). It is his extensive list of accomplishments and experience that makes Mr. Tennyson the driving force behind Green Field Construction Group’s unremitting growth.

Mr. Tennyson’s positive vision for Green Field Construction Group is leveraged by not only his wealth of experience, but also his long established and well trusted relationships with subcontractors of all trades. His ability to develop and retain a strong client base is the foundation that Green Field Construction Group was built upon. Mr. Tennyson utilized a “Best of Breed” philosophy when selecting his core team of managers. This team has a combined 100+ years of experience in construction, finance, and management. His integrity and vision for Green Field Construction Group has been instrumental in establishing the company as a top construction management firm within the industry.

Sean Brennan

Director of Construction

Sean Brennan, Green Field Construction Group’s Director of Construction, is recognized as one of the premier builders of core and shell and interior build outs in the New York/Metropolitan Areas. Mr. Brennan’s expertise allows him to excel in document control, vendor oversight, staff management, schedule coordination, cost control, and client management. Mr. Brennan’s vast experience spans over twenty-plus years, and incorporates all aspects of the construction cycle. He has contributed to successful projects throughout New York and New Jersey in various roles including Labor Foreman, Superintendent, Project Manager, and General Contractor.

In addition to various projects, throughout Mr. Brennan’s career he has completed a 22-story residential core and shell build out, 17-story complete gut renovation, and 35-story interior renovation. Mr. Brennan’s extensive field experience, effective leadership qualities, and construction management expertise provide a solid foundation for Green Field’s management team.