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Mechanical HVAC Design Engineer

Geosyntec Consultants
United States, South Carolina, Aiken
Oct 01, 2026

Mechanical HVAC Design Engineer
Primary Location

US-SC-Aiken
ID

2026-4936



Category
Mechanical Engineer

Position Type
Regular Full-Time

Remote
No



Overview

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 30 years. We contribute to DOE's nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts. We are seeking a motivated Mechanical HVAC Design Engineer to contribute to our mission supporting our work at Savannah River Nuclear Solutions in Aiken, SC.

Geosyntec is an innovative, international engineering and consulting firm serving private and public-sector clients to address new ventures and complex problems involving our environment, natural resources, and civil infrastructure. Our engineers, scientists, technical and project employees serve our clients from offices across the world. 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.

We invest in our people. Each employee is unique, and your career at Geosyntec will be too. We offer competitive pay and benefits, and well-being programs to support you and your family.

To Learn More Visit: http://www.geosyntec.com/careers/.



Essential Duties and Responsibilities

    Provide design engineering sta augmentation support to SRNS.
  • Primary responsibilities include:
    • HVAC design development and generation of design output documents
      including but not limited to calculations for equipment sizing, duct sizing,
      pressure drops, cooling tower sizing, heating and cooling loads, and air
      balancing.
    • Create/modify piping and instrumentation diagrams, system descriptions,
      mechanical equipment lists, integration with fire protection design, and vendor
      document reviews.
    • Engineering Services shall be provided using SRNS processes and procedures.
      Programmatic guidance will be provided by SRNS.


Education and Licensure

  • BS Degree in Mechanical, Chemical or Nuclear Engineering or current registration
    as a Professional Engineer in Mechanical, Chemical, or Nuclear Engineering.


Skills, Experience and Qualifications

REQUIRED SKILLS, EXPERIENCE AND QUALIFICATIONS:

  • At least 10 of relevant experience in HVAC design experience in the nuclear or process chemical industry.
  • Candidate must demonstrate knowledge of NFPA 90A, 90B, 91, and 801; ASHRAE Fundamentals; ASME AG-1, 509 and 510; SMACNA; and ARI 410, 430 and 450.
  • Subcontractor must have an active eFOCI registration and approved FacilityLevel Clearance with DOE / NNSA.
  • Candidate must have the ability to walk down systems in the field.
  • Due to federal contract security requirements, this position requires U.S. Citizenship.
  • Health & Safety training, medical monitoring, and client-driven drug and background testing.

PREFERRED QUALIFICATIONS & LOCATION DETAILS:

  • Candidate demonstrates experience in 2D MicroStation Computer Aided Drafting and Design (CADD).
  • Previous SRNS design experience and familiarity with the processes and procedures for providing engineering support to SRS facilities is preferred.
  • Possession of an active DOE clearance (L or Q) within the past two (2) years
    is preferred.

Please note that federal contractors are required to maintain a drug-free workplace. Regardless of state laws permitting medical or recreational marijuana use, employees working under federal contracts may be subject to federal requirements that prohibit marijuana use.

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