[Asphalt and Paving Contractors in Phoenix, Arizona | Specializing in Paving, Crack Seal, Seal Coat, Chip Seal, Excavation, Grading and Asphalt Repair | D&O Contractors, Inc. D&O Contractors is an asphalt paving contractor specializing in escavation, grading, paving, chip seal, and crack seal. We have completed thousands of projects across Arizona. D&O Contractors is fully licensed and bonded. We have over 20 years of experience in paving, grading, and all aspects of asphalt.]