Under this delivery method, you contract directly with subcontractors and we manage their performance. Colvos employs specialized project management techniques to oversee the planning, design, and construction of a project, from its beginning to its end. To control a project's time, cost, and quality, our Construction Management services are compatible with all project delivery systems, including design-bid-build, design-build, CM At-Risk, and Public-Private Partnerships (P3).