Shifting the
Relationship Paradigm.

Construction Management & General Contracting

Seeking to elevate the collective consciousness of the construction ​industry to align with that of a modern and ever‑changing society
Relationship Focused.
Innovative leaders collaborating from idea, through development to implementation. The Partners, having 100 years of combined experience, bring a diverse background of project expertise, original ideas and an extensive knowledge base of the construction industry.

Ninnis, RA

Principal and CEO

Jonathan Ninnis, RA

Principal and CEO

Jonathan serves as Principal and CEO of OC Construction Management. OC is a Construction Management Services firm specializing in commercial repositioning, corporate interiors and base building redevelopments across all real state sectors. As the firm’s CEO, Mr. Ninnis remains actively involved in the daily execution of OC’s projects while also setting the strategic direction of the company. Mr. Ninnis brings to the table more than 20 years of experience and unlike many others in the field, a foundation in architecture with a highly technical background and knowledge in both design and construction. This expertise by nature creates a pro-active rather than reactive management style and allows a strategic approach to the many facets of completing a complex project. Prior to founding OC Construction Management, Mr. Ninnis has held positions throughout the Real Estate Industry including Vice President of Development at L&L Holding Company, Senior Associate at VVA Project Managers, and Managing Agent at Citi for Cushman and Wakefield. These positions have allowed Jonathan to complete prestigious projects for many well-known clients such as Citi, JP Morgan, NYU Langone Medical Center, City University of New York, the Union Club of the City of New York, Beacon Capital and many others. Over the course of his career, Jonathan has completed over $800 million in projects spanning across 4.5 million square feet of real estate throughout the greater NYC, NJ, and Boston areas. Mr. Ninnis is a registered architect and holds a Bachelor of Architecture degree from New Jersey Institute of Technology. Jonathan also serves on NJIT’s Dean’s Executive Counsel.


Principal and Chief
Operating Officer

Michael Sci

Principal and Chief Operating Officer

Mr. Sci serves as a Principal and Chief Operating Officer (COO) of OC Construction Management. As COO, Michael is responsible for creating a platform for the efficient and transparent implementation of all business units within OC. These units are inclusive of but not limited to Project Management, Construction Management and Asset Reinvestment Strategy. OC is dedicated to providing turnkey development services while communicating openly, honestly and clearly to our clients. As COO, Mr. Sci’s responsibilities are primarily focused on building an internal infrastructure to ensure employees and clients are on the same page with respect to schedule, cost, risk and opportunity. Mr. Sci also brings a very hands-on coaching and mentoring background established in his 25 years of building and developing large teams within major corporations. Prior to joining OC, Mr. Sci has held positions throughout the Real Estate Industry including SVP at JLL within their Corporate Solutions Division. In this role, Michael was responsible for 12 million square feet throughout 13 states in the Northeast, Midwest, and Southeast Regions on the JPMC account. He oversaw a team of 170+ employees who managed New Store, Relocation, Renovation, Signage, and Improvement projects. Prior to JLL, Mr. Sci was the Northeast Regional Lead at TD Bank; he and his team managed the NE new build capital plan and were responsible for TD’s most aggressive “Take NY” organic growth initiative. However, it was Mr. Sci’s work as the North American (NAM) Head for Retail PM at Citigroup where he was first recognized for his outstanding leadership skills. In his role at Citigroup, Michael’s team delivered over 2000 projects within the US. In addition, he has worked on retail bank projects in APAC and LATAM. Michael has been a LEED AP since 2007 with vast experience in the LEED volume build program and piloted the first volume prototype for Citi with the USGBC. Mr. Sci holds a Bachelor’s Degree in Applied Mathematics from Queens College in Queens, NY. He is also a LEED AP O+M, CoreNet Member, ICSC Member, and USGBC Member. He has been a presenter at the Sustainable Operations Summit.


Principal and Senior Vice
President of Construction

John McGrath

Principal and Senior Vice President of Construction

Mr. John McGrath is Principal and Senior Vice President of Construction for OC Construction Management.  In his role, John is instrumental in guiding OC’s future as a member of the senior leadership team. To foster the company’s growth throughout the tri-state area, he also continues to partner with existing clients to ensure successful project completions. His experience encompasses all aspects of construction, including new buildings, residential, commercial, interiors, retail, hospitality, white box, foundations, structural steel, facades, curtainwall, vertical transportation, and MEPs. Prior to joining OC Construction Management, Mr. McGrath worked for Hunter Roberts Construction Group and Ideal Interiors.  Mr. McGrath has completed over $500 million of construction work throughout New York. Mr. McGrath has a Bachelor of Science in Civil Engineering with a concentration in Construction Management from Columbia University. He is also LEED AP BD+C Accredited.
Full Execution
Anchored by the core fundamentals of operating a construction firm that embraces diverse concepts and intelligent collaborations through non-adversarial partnerships, OC continues to lead the industry in commercial repositioning, corporate interiors and base building redevelopments by strategically weaving together our in-house and industry expertise.
From Construction
to Occupancy.
OC provides construction management services from acquisition thru occupancy. Being involved in the full project lifecycle allows us to maximize our benefit to the owner, both in terms of end product and cost of services.
In the News.
02 March 2022
Kenny Chan Promoted to Assistant Vice President
28 February 2022
Diligently Diversifying