Applies professional knowledge or expertise in one or more specialty areas within EH&S and serves as lead person on one or more program(s) within a single discipline. Work is reviewed upon completion to ensure predetermined objectives are adequately met and that application of professional / technical judgment is sound. Demonstrates good judgment in selecting methods and techniques for obtaining solutions. Provides regulatory interpretation and technical advice. Decision-making is based on established procedures; relevant laws; regulations and organizational policy; professional best practices; relevant science methodology; impact on other EH&S programs, and senior management approvals as required. Decisions may impact individual work, other EH&S programs, other departments