Principal Structural Design Engineer

About the role

Longenecker & Associates (L&A), a Geosyntec Company, is a trusted partner enabling critical missions across the U.S. Department of Energy (DOE) complex for more than 35 years. L&A contributes to DOE’s nuclear security and environmental remediation enterprise by providing the highest‑caliber staff and experts. Geosyntec is an innovative, international engineering and consulting firm serving private and public‑sector clients to address new ventures and complex problems involving the environment, natural resources, and civil infrastructure. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service. The company invests in its people, offering competitive pay and benefits, well‑being programs, in‑house training, career pathing, mentoring, award programs, tuition reimbursement, and more.

This position supports work at Savannah River Nuclear Solutions in Aiken, SC. The role is onsite; local candidates or those willing to relocate at their own expense are considered. Projects supported include General Design Engineering business.

Responsibilities

• Provide design and construction oversight of structural engineering tasks to SRNS.
• Analysis of structural systems for both static and dynamic loads using manual computation and computer programs.
• Design of concrete structures; design of steel, aluminum, stainless steel, timber and composite structures.
• Foundation and anchorage design.
• Structural analysis for impact, overpressure, and other accident conditions.
• Preparation of CSI specifications; and review of vendor documents.
• Engineering services shall be provided using SRNS processes and procedures.
• Programmatic guidance will be provided by SRNS.

Qualifications

BS Degree in Civil Engineering or current registration as a Professional Engineer in either Civil or Structural Engineering.

Skills

• Minimum of ten (10) years of experience in design and analysis of nuclear or industrial facilities.
• Working knowledge of STAAD.
• Working knowledge of National Codes and Standards such as IBC, AISC (ASD and LRFD), ACI, AWS, NFPA, and OSHA.
• Ability to successfully pass a federal background investigation to secure and maintain DOE Q security clearance if required.
• U.S. Citizenship required due to federal contract security requirements.
• Ability to perform the essential functions of the job with reasonable accommodation.
• Health & Safety training, medical monitoring, and client‑driven drug and background testing.
• Marijuana remains a Schedule III controlled substance under Federal Law; federal contractors must follow Federal drug‑free workplace rules, which prohibit marijuana use even if medical or recreational use