Principal (Relay) Engineer, PE
Confidential
Posted: January 30, 2026
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Quick Summary
Senior Relay Engineer, PE with strong technical skills and experience in designing and implementing complex engineering solutions.
Required Skills
Job Description
Senior Relay Engineer, PE (Remote option)
McCall Thomas Engineering Company, Inc. is seeking a senior-level Principal Engineer, PE with Relay experience.
Job Location: Hybrid with the requirement to work locally in the Moncks Corner, SC office 20 hours per week.
Approximate salary range, depending on level of experience: $140,000 to $170,000
At McCall-Thomas Engineering we have been providing quality engineering and technical services since 1945. With more than 200 clients, McCall-Thomas continues to take great pride in utilizing our experience and efficiency to provide the highest quality engineering and technical services for the success of our valued clients.
McCall-Thomas Engineering is a multi-faceted engineering firm serving clients through Communications Engineering, Civil & Electrical Engineering and Design, Utility Maintenance Services, Electric Field Operations & UAS, as well as the McT Learning Center and Print Services.
A McCall-Thomas Principal Engineer, PE (Relay) will provide engineering and technical expertise to transmission and distribution substation engineering and design teams for the purpose of delivering safe, cost-effective, and quality engineering and design services. This role will entail both direct billable client work and project management support for projects. The employee will be expected to take initiative on discipline-specific work for projects, perform assigned engineering duties and manage project schedules and budgets. He or she will also support proposal development and project cost estimating.
Primary responsibilities for this role:
Research, investigate and evaluate new technological applications and materials to be used for the design of electrical substations
Develop project designs for transmission, distribution and generation electrical substations to include the specification and procurement of required equipment and materials
Develop substation ground grid designs
Provide power system and protection engineering services and technical assistance to clients
Assist field personnel with the installation of specified material
Perform soil resistivity tests and fall of potential tests using Syscal Jr.
Support factory acceptance testing, site testing & commissioning of substation equipment
Design and implement protective relay schemes
Analyze and troubleshoot relay system issues
Participate in system upgrades and modifications
Prepare technical reports and documentation
Familiarity with SCADA systems and their integration with relay protection
Coordinate with other engineers and technicians to ensure proper installation and operation of protective relays
Work with the Engineering Manager to define project objectives, prepare design estimates, and define project requirements and design approaches
Coordinate design activities to ensure installation and operations will comply with specifications, codes, and client requirements
Identify, analyze, and resolve engineering, technical and design problems
Prepare thorough, timely, and accurate technical reports, correspondence, documentation, calculations, and sketches that meet client requirements
Perform independent work as well as provide second tier independent review of work performed by others including calculations, drawing preparation, drawing accuracy, material BOM, and equipment specifications.
Interact with clients’ engineering and technical teams on a regular basis; represent McCall-Thomas Engineering positively and professionally, and develop and maintain professional relationships with clients
Continually improve job-related engineering, technical and professional knowledge, skills, process development, and performance
This job description is not intended to be all-inclusive. This employee may perform other related duties as required to meet the ongoing needs of the organization.
Good Candidate
Hybrid position
South Carolina resident preferred
20 hours in the Moncks Corner office with two night per diem and mileage each week
20 hours per week remote
Better Candidate
Hybrid position, 20 hours per week in Moncks Corner office
20 hours per week remote
Resident of Charleston, Berkeley, or Dorchester County
Sign on bonus
Best Candidate
40 hours per week in the Moncks Corner office
Sign on bonus
Relocation reimbursement
What Will You Need (Candidates MUST meet the following minimum criteria for consideration):
Minimum 15+ years' Relay experience with an electric utility or engineering consulting firm
Eligibility to work in the US without sponsorship (required)
Bachelor's degree in electrical engineering from an ABET-accredited engineering program
PE license required within 90 days
Valid driver’s license with clean driving record
McCall-Thomas Engineering does not sponsor employees for work authorization in the US.
What We Offer:
At McCall-Thomas, we offer employees the chance to work with great people on exciting projects, with opportunity for growth. We also provide a full range of benefits for employees, such as:
Competitive compensation
100% company-paid medical insurance
Company-paid long-term disability insurance
Company-paid life insurance
401k plan with employer match up to 5%
Paid time off and holiday leave
Stock ownership opportunities