cchttp://newyorkconstructionestimatorconsultantspire.com This is a group of construction consultants that have a minimum of 20 years in a given field.The collaborative service has been in business since 1994 assisting developers, contractors, building managers, and business corporations. The Kerrigan Group was founded by Tom Kerrigan as backup for clients in need of temporary employees such as estimators or project managers. A specialist could by hired per diem at the employers disgression and compensated on a 1099 basis, without any unemployment concerns.