Leadership Team

Michael Abarno, CCM

Michael Abarno, CCM

Project Manager

Michael Abarno is a Certified Construction Manager conferred by the Construction Management Association of America. He has more than 29 years of experience in the construction industry with more than 24 years spent in...
Jay Appleton, PE, CHC, CSSHO

Jay Appleton, PE, CHC, CSSHO

Project Executive

Jay Appleton joined GREYHAWK in 2015. He has more than 35 years of experience in the design and construction industry, and he leads large and diverse project teams in the development of educational and...
Joseph Brownmiller

Joseph Brownmiller

Construction Manager

Joseph Brownmiller received his Bachelors of Science in Construction Management from Roger Williams University. Joe has 12 years of experience in the construction industry. Working for both construction management and general contracting firms, he...
Ross Caldwell, CCM, LEED AP

Ross Caldwell, CCM, LEED AP

Project Executive

Ross Caldwell joined GREYHAWK in 2002. He has more than 35 years of experience in the construction industry and serves in an oversight role on multiple projects for GREYHAWK. Ross has also been involved...
Thomas Dills

Thomas Dills

Construction Manager

Thomas Dills received his Bachelors of the Arts for Environmental Studies from Western State College. He has his Construction Quality Management for Contractors Certification from Army Corps of Engineers as well as his Environmental...
Robert J. Dinan, PE, CCM, LEED AP

Robert J. Dinan, PE, CCM, LEED AP

Project Executive

Robert Dinan joined GREYHAWK in 2002. He has more than 20 years of professional construction management experience. Robert has served in a leadership role for GREYHAWK on more than $300 million of new construction,...
Joseph F. Donnelly

Joseph F. Donnelly

Senior Construction Manager

Joseph F Donnelly received his Bachelors of Science from Mount Saint Mary’s College. He is a NJ Construction Code, NJ Building Sub code and a NJ Housing Code Official. He has his NJ Building...
John Haynal

John Haynal

Senior Construction Manager

John Haynal received his Associate of Arts in Business and Business Construction from Pierce Junior College. He has his New Jersey Building Inspector license as well as RCS, ICS, HHS, ICS and Fire inspection...
Lawrence Hazen, PE

Lawrence Hazen, PE

Senior Construction Manager

Lawrence Hazen received his Bachelors of Science in Civil Engineering from the University of New Hampshire and is a licensed Professional Engineer. Larry has over 25 years of experience in the construction and consulting...
Grayling L. Johnson, RA, NCARB

Grayling L. Johnson, RA, NCARB

Project Executive

Grayling Johnson joined GREYHAWK in 2015. He has more than 25 years of concentrated experience in architectural design and documentation, as well as construction contract administration. He has acted in the capacity of both...
James Lauria

James Lauria

Construction Manager

James Lauria received a Bachelor of Science in Mechanical Engineering from Rutgers University and his Construction Management Certification from Camden County College. James also received his Education Facilities Management Certification from Rutgers University. He...
Fritz T. Marth, PE, CFCC

Fritz T. Marth, PE, CFCC

Senior Managing Consultant

Fritz Marth joined GREYHAWK in 2008. He has over 25 years of experience in the construction industry specializing in disputes and claims resolution, critical path method scheduling and delay analysis, cost damages analysis, and...
Tania Rabitsky

Tania Rabitsky

Project Manager

Tania Rabitsky received a degree in Civil Engineering from Leningrad Academy of Railway Engineers is St. Petersburg, Russia (the equivalent to a Master’s of Science degree in Civil Engineering in the United States). Tania...
John Ramos

John Ramos

Managing Consultant

John Ramos has more than 30 years of experience, specializing in project controls, CPM scheduling and claims consulting. His experience as a scheduler enables him to recognize areas where delays typically occur and provide...
Charles Rehman

Charles Rehman

Construction Manager

Charles Rehman received his Bachelors of Arts from Rutgers University and his Associate of Applied Science from Gloucester County College. He received his Construction Management Certification from Drexel University. Chuck has more than 27...
Barrett Richards, CEP, CCC, PSP

Barrett Richards, CEP, CCC, PSP

Managing Consultant

Barrett Richards joined GREYHAWK in 2016. He has more than 15 years of experience in project management oversight; claims and litigation support; project planning and scheduling as well as pre-construction and constructing cost estimating....
Jeffery Riggs, CCP

Jeffery Riggs, CCP

Commissioning Manager

Jeffery Riggs joined GREYHAWK in 2013. He has more than 30 years of experience specializing in the mechanical construction industry. Jeff’s specific experience includes coordination of all aspects of plumbing and mechanical piping layout...
Cornelius (Neil) Riley

Cornelius (Neil) Riley

Construction Manager

Neil Riley received his Associate of Applied Science degree in Construction Management from Cumberland County College. He has his certificate in Lead-Based Paint Abatement and completed a four-year apprenticeship program with Brotherhood of Carpenters...
Michael Schaefer, CEFM

Michael Schaefer, CEFM

Project Manager

Michael Schaefer holds an Educational Facilities Manager Certificate from Rutgers University. He also received his HVAC certification from Burlington County Institute of Technology. Michael has 31 years of experience as a construction manager and...
Octavio (Tony) Serrenho

Octavio (Tony) Serrenho

Construction Manager

Tony Serrenho earned his US Army Corp Engineers Construction Quality Management for Contractors Certification. Tony has more than 30 years of experience managing construction projects. He has functioned as both a superintendent and project...
William Slavin

William Slavin

Commissioning Agent/Project Manager

William Slavin served an apprenticeship with the Local Union 332, is registered as a Master Plumber and has his HVAC license in New Jersey. Bill has more than 35 years of experience in the...
Shawn Toal

Shawn Toal

Commissioning Agent

Shawn Toal served an apprenticeship with the Local Union 332 and received his New Jersey Building Inspector License, High Rise Hazard Discipline, from Burlington County College. Shawn has more than 30 years of experience...