Senior Project Manager at Simpson Gumpertz & Heger Inc.Mr. Brett joined SGH in 2006. He has more than 16 yrs of experience in structural engineering, which includes designing, investigating, and rehabilitating buildings and transportation-related structures. Mr. Brett has designed shallow foundations and slabs-on-grades for many different types of structures (e.g., buildings, houses, radar towers, overhead sign support structures, and mechanical equipment) in temperate and arctic conditions. He is a member of the Post-Tensioning Institute Committee DC-80, for repair and rehabilitation of post-tensioned structures, and a registered professional structural engineer in Massachusetts and four other states. He can be reached at crbrett@sgh.com.

Principal at Simpson Gumpertz & Heger Inc.
Mr. DiFiore joined SGH in 2005. He has over 20 yrs of experience designing, investigating, and rehabilitating a variety of structures. He holds degrees in both Geotechnical and Structural Engineering, and he combines that knowledge to solve complex problems related to below-grade construction, including retaining walls, excavation-support systems, underpinning systems, and foundations. Mr. DiFiore has taught classes in Applied Mechanics at Tufts University, and he is a member of the Geotechnical Advisory Committee for the Massachusetts Board of Building Regulations and Standards (BBRS). Mr. DiFiore is a registered professional engineer in Massachusetts and several other states. He can be reached at sjdifiore@sgh.com. 

Associate Principal at Simpson Gumpertz & Heger Inc.Mr. Smith joined SGH in 2006. He has over 13 years of engineering experience, including structural design, investigations of building damage and collapses, repair and rehabilitation projects, due diligence and building condition assessments, and monitoring of foundation installations. His background in geotechnical engineering provides him with knowledge of soil and foundation types that aids him in performing structural evaluations of existing buildings and investigations of structural damage and collapses. Mr. Smith is a registered professional engineer in New York and three other states. He can be reached at nbsmith@sgh.com.

Mr. Strohman joined SGH in 2006. He has over 15 years of diverse experience in geotechnical, civil, and structural engineering, including investigating, designing, and/or rehabilitating a variety of structures, including mechanically-stabilized earth walls, slopes, foundations, piles, excavation support systems, retaining walls, and underground structures. Mr. Strohman has performed numerous investigations to determine causes of building settlement, retaining wall failures, and slope failures. He has assisted in the resolution of several construction-related disputes by presentation of expert opinions in depositions, mediations, arbitrations, and at trial. He is a registered professional engineer in more than thirty states. He can be reached at bpstrohman@sgh.com. 

Ms. Zelada-Tumialan joined SGH in 2003. Her area of expertise is in geotechnical engineering. She provides planning, design, and construction support services in the areas of shallow and deep foundation systems, earth-retention systems, and groundwater monitoring for residential, commercial, and industrial buildings, power stations, and substations. Ms. Zelada-Tumialan has also participated in multiple investigations to determine causes of building settlement, retaining wall failures, and slope failures, and she has provided litigation support for various projects. She is a registered professional engineer in Massachusetts and several other states. She can be reached at gazelada@sgh.com.