Demo

Senior Mechanical Engineer

AVANTech, LLC
Columbia, SC Full Time
POSTED ON 10/15/2026
AVAILABLE BEFORE 11/13/2026

Who We Are

AVANTech, LLC is a rapidly growing technology company which designs, fabricates, and operates specialty water treatment equipment for government and commercial clients. We solve some of the most challenging problems in the water industry – from being first responders to the Fukushima Nuclear Plant meltdown to implementing patented first-of-its-kind technology for industrial wastewater recycling to cleaning-up legacy wastewater at government sites resulting from weapons manufacturing during the cold war era. AVANTech’s goal is to improve the environment around us and support our clients with innovative sustainable water treatment solutions.

Who You Are

The Senior Mechanical Engineer provides technical leadership in the design, analysis, fabrication support, testing and implementation of engineered systems for industrial, government, and nuclear applications. Your role in this process will include the review and approval of various design documentation including 3D system models, 2D design drawings, technical reports, and engineering calculations. This position is responsible for developing engineering solutions, reviewing technical documentation, supporting project execution, and ensuring compliance with applicable customer requirements, engineering standards and regulatory expectations. This is an upper-level mechanical engineering position with opportunities for advancement based on productivity, efficiency, and experience.

Benefits of working with AVANTech:

Generous paid time off and holidays.

Great opportunity for advancement with a growing company.

Varied insurance offerings with employer matching.

401(k) savings plan with employer match.

Flexible work schedule, including hybrid. Options can include the following:

Monday – Thursday (10-hour days), Off on Friday.

Monday – Thursday (9-hour days), Half Day on Friday.

Monday – Friday (8-hour days).


Job Responsibilities/Duties

  • Assess and clarify client specifications to establish design/engineering scope and technical requirements.
  • Provide technical oversight to ensure designs comply with applicable codes, standards, and project requirements.
  • Perform and document design calculations to ensure design is compliant with client specifications and applicable codes and standards.
  • Assist with the preparation of scope, cost, and schedules for future project/tasks.
  • Provide technical guidance to AVANTech subcontractors in the execution of design, engineering, analyses, fabrication, or testing support.
  • Provide technical guidance and mentoring to engineers and designers.
  • Serve as a technical resource during customer reviews and audits.
  • Evaluate engineering impacts associated with fabrication issues and field conditions.
  • Support implementation of engineering controls necessary to meet customer, regulatory, and contractual requirements.
  • Maintain engineering documentation sufficient to support project traceability, design verification, and long-term configuration management.
  • Apply disciplined engineering practices appropriate for safety-significant and mission-critical systems.

Required Qualifications

  • Bachelor of Science (B.S.) Degree in Mechanical Engineering from an accredited college/university or related technical discipline.
  • Professional Engineer (P.E.) license preferred, not required.
  • Minimum of 10 years’ related experience
  • Significant nuclear experience with government or commercial nuclear clients if required. Preferred design experience that's directly associated with the Department of Energy.
  • Experience with pressure vessels, piping systems, structural design, and custom engineered systems.
  • Familiarity with NQA-1, ASME Section III, ASME Section VIII, ASME B31.3, ASCE 7-22, AWS Welding codes, or similar industry standards.
  • Familiarity with various types of design software (SolidWorks, Creo Parametric, COMPRESS, Mathcad, etc.)

Additional Requirements

All candidates must be able to pass a drug test, pre-employment physical, and background investigation.

High awareness of safe working practices and procedures.

Job Type & Compensation:

Full-time, salaried, exempt.

Annual salary range based on experience and skill level.

Relocation package available.

Paid time off, flexible hours, and a comprehensive benefits package.

Salary.com Estimation for Senior Mechanical Engineer in Columbia, SC
$126,057 to $149,289
If your compensation planning software is too rigid to deploy winning incentive strategies, it’s time to find an adaptable solution. Compensation Planning
Enhance your organization's compensation strategy with salary data sets that HR and team managers can use to pay your staff right. Surveys & Data Sets

What is the career path for a Senior Mechanical Engineer?

Sign up to receive alerts about other jobs on the Senior Mechanical Engineer career path by checking the boxes next to the positions that interest you.
Income Estimation: 
$108,186 - $133,193
Income Estimation: 
$134,236 - $174,128
Income Estimation: 
$132,162 - $161,329
Income Estimation: 
$158,725 - $194,124
Income Estimation: 
$119,658 - $160,028
Income Estimation: 
$197,917 - $247,739
Employees: Get a Salary Increase
View Core, Job Family, and Industry Job Skills and Competency Data for more than 15,000 Job Titles Skills Library

Job openings at AVANTech, LLC

  • AVANTech, LLC Columbia, SC
  • AVANTech, LLC Columbia, SC $70000.00 to $115000.00 per year Who We Are AVANTech, LLC is a rapidly growing technology company which designs, fabricates, and... more
  • Just Posted

  • AVANTech, LLC Columbia, SC
  • Who We Are AVANTech, LLC is a rapidly growing technology company which designs, fabricates, and operates specialty water treatment equipment for government... more
  • 1 Day Ago

  • AVANTech, LLC Columbia, SC
  • Who We Are AVANTech, LLC is a rapidly growing technology company which designs, fabricates, and operates specialty water treatment equipment for government... more
  • 1 Day Ago

  • AVANTech, LLC Knoxville, TN
  • Benefits of working with AVANTech Generous paid time off and holidays Great opportunity for advancement with a growing company Varied insurance offerings w... more
  • 4 Days Ago


Not the job you're looking for? Here are some other Senior Mechanical Engineer jobs in the Columbia, SC area that may be a better fit.

  • Kimley-Horn Columbia, SC
  • Overview Kimley-Horn is seeking a Senior Mechanical Engineer with 8 years of experience to join the Columbia, SC office! This is not a remote position. Res... more
  • 12 Days Ago

  • SSOE Group Columbia, SC
  • SSOE is seeking a Senior Mechanical Engineer - Data Centers who will play a pivotal role in shaping the future of data center facilities and high-performan... more
  • 2 Days Ago

AI Assistant is available now!

Feel free to start your new journey!