For over 30 years, Duffield Associates’ Field Services Division has provided consulting services, construction review, and construction administrative services on an extensive number of projects. By working collaboratively with our engineers and scientists, and our clients’ staff, our field representatives and residents ensure a high caliber of review on every project we undertake.  Many of our field representatives hold certifications by ACI, NICET, ICC, CGI, and CPSEC, and our engineers and technicians participate in PSM training as well as many having Transportation Workers Identification Credentials (TWIC) from the TSA.