Electrical Engineer III

Cornerstone Energy Services Portland, Maine, United States

Cornerstone Energy Services, Inc. specializes in engineering, survey, and land solutions for the energy infrastructure sector. From initial concept through project completion, we provide comprehensive services including civil, process, mechanical, and I&E engineering; project management; survey and mapping; and right-of-way acquisition.

We collaborate closely with developers and operators of oil and gas pipelines and electric transmission systems, supporting both extensive linear projects and site-specific developments. Our work is guided by three core values:

• Safety – protecting the public, our clients, and our team
• Advocacy – prioritizing the best interests of our clients
• Integrity – upholding professionalism and accountability in every aspect of our operations

The Principal Electrical Engineer leads the electrical design of projects at natural gas facilities, from conceptual studies through construction and commissioning. The role owns technical quality for power distribution, hazardous area classification, grounding, lighting, and instrumentation and control interfaces. The Engineer serves as a primary technical contact for clients, mentors’ junior staff, and ensures every deliverable meets applicable codes, client standards, and Cornerstone's safety expectations.

Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Applicants must be legally authorized to work in the United States at the time of application on a full-time basis without the need for employer-sponsored work authorization now or in the future. Candidates who qualify for TN classification may apply but are responsible for securing and maintaining their own work authorization.

• Serve as electrical discipline lead on multi-discipline project teams.
• Build strong relationships with clients as a trusted technical advisor.
• Prepare electrical scopes of work, man-hour estimates, and schedules for proposals.
• Track discipline budget and schedule, and report status to project managers.
• Lead electrical design for new, retrofit, and life-extension projects at LNG peak shaving plants, gate and regulator stations, and related gas infrastructure.
• Develop or direct the development of electrical design packages, including one-line diagrams, hazardous area classification drawings, power distribution and MCC layouts, cable and conduit schedules and plans, grounding designs, and lighting designs.
• Perform or direct performance of electrical studies, including load flow, short circuit, protective device coordination, arc flash hazard analysis, cable sizing, voltage drop, and lighting calculations.
• Specify and evaluate electrical equipment, including switch gear, transformers, MCCs, VFDs, UPS systems, and standby generators.
• Provide electrical and controls input to HAZOP, LOPA, and constructability reviews.
• Coordinate with controls and instrumentation engineers on PLC and DCS power, control panel design, instrument power and grounding, and SCADA interfaces.
• Review control schematics, interconnection diagrams, and loop drawings for consistency with the electrical design.
• Conduct site surveys and field verification of existing electrical systems at operating facilities.
• Support bidding, answer RFIs, review vendor submittals, and resolve field issues during construction.
• Support factory acceptance testing, site acceptance testing, startup, and commissioning.
• Produce or oversee as-built updates and record documentation.
• Guide engineers and designers as they develop drawings, calculations, and specifications.
• Ensure designs comply with applicable codes,…