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Our Experts

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Peter J. Carrato, S.E, P.E., C.Eng., PhD., F.ASCE, F.ICE, F.ABET, F.ACI, M.AISC

Principal Consulting Structural Engineer

Former Bechtel Corporate Fellow (Retired)

40+ yrs. Experience

Former Bechtel corporate Manager of Building Information Modeling (BIM), virtual design & construction, technical oversight for some of Bechtel’s largest global infrastructure projects, key roles in all phases of project delivery, due diligence analyses to Bechtel’s senior management, conflict resolution with owners, regulators, suppliers and sub-contractors.

Past Committees:

  • ACI 131 Building Information Modeling
  • ACI 355 Anchorage to Concrete
  • ACI 349 Concrete Nuclear Structures

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William H. Johnson, Ph.D., P.E., F.ASCE, M.AISC

Principal Consulting Structural Engineer

45+ yrs. Experience

SME: Impact, Blast, Aircraft Impact Analyses, Dynamic Analysis, Seismic Qualification, Development of Nuclear Licensing Documents, Machine Foundation Design, Heavy Equipment Rigging

Past Committees:

  • AISC Task 12 Subcommittee AISC N690 (2005 - 2016)
  • ASCE Standard Committee for Blast Protection of Buildings (2009 - 2014)


Perry S. Green, Ph.D., P.E., F.ASCE, F.SEI, M.AISC

Principal Consulting Structural Engineer

Former Technical Director - Steel Joist Institute

35+ yrs. Experience

Structural analysis and design of steel and concrete structures, systems and components of plants under design development, construction, construction engineering oversight, startup, and outages as well as the configuration management aspects of pre-operational and operating nuclear power plants.

SME: Stability of metal structures, inelastic behavior of structural systems and members, cold-formed steel, connection design, construction oversight and quality assurance

Current Committees:

  • AISC (Member TC11, Nuclear Facilities Design)
  • AISI, Cold-Formed Steel Committee on Specifications (Member, Main Committee and Chair, Subcommittee 3 – Connections and Joints)
  • ASCE-SEI (Chair, Cold-Formed Steel Committee)
  • Structural Stability Research Council (Member Executive Committee)


Kenneth R. Bell, Ph.D., P.E., D.GE, F.ASCE, F.ASTM

Principal Consulting Geotechnical Engineer

Former Bechtel Corporate Fellow (Retired)

38+ yrs. Experience

Former Chief Engineer of the Power and Infrastructure Global Business Units and Corporate Manager of Bechtel’s Geotechnical and Hydraulic Engineering Services (G&HES) Group. Responsibility for the technical quality of all work products produced by Bechtel’s G&HES Group.

SME: Site investigations, development of foundation recommendations, deep excavations using slurry wall technology, ground modifications (jet grouting), pile driving, and rock tunnels

Current Committees:

  • ASTM International Committee on Soil and Rock, Vice Chair