A Sanderson Bellecci Company | Intelligent Infrastructure Mission: Advancing Humankind through Intelligent use of our Land. For over 40 years, Bellecci has been serving Western US clients in both the public and private sector. Our clients include universities, cities, large energy companies, public home builders, counties, water and sewer districts, schools, architects, private developers, state agencies, contractors, law firms and international investors. 50% of our technical staff are licensed professionals in CA. The in-house Bellecci Team is highly collaborative and has an average of 12 years tenure with the firm. Concord and Pleasanton, California Billings, Bozeman, and Helena, Montana Fort Collins, Colorado