Engineer III

Engineer III

Organization: Cornerstone Energy Services

Date Posted: 2/24/2026

City: Portland

Location: Maine

Country: United States

Primary Category: Engineering

Subcategories: Energy, Engineering

Type of Position: Full-Time

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 Engineer III serves as a senior technical leader responsible for driving engineering excellence, operational performance, and client satisfaction across complex projects and multiple disciplines. This role combines advanced engineering expertise with strategic planning, quality oversight, business development engagement, and team leadership.

An Engineer III exercises independent judgement, identifies complex challenges, and develops innovative, practical solutions that align with Cornerstone’s commitment to quality, safety and client service. This position plays a critical role in maintaining company standards, strengthening client relationships, and supporting long‑term organizational growth.

• Provide engineering leadership to a project or discipline.
• Maintain or set company standards for quality, production, efficiency, and public safety.
• Report findings and take necessary action to correct deficiencies.
• Design, draft, and/or plan proposed projects; review engineering reports and specifications for compliance and guidelines.
• Ensure that the company is current on the latest industry technology and uses the best tools available for each application; recommend improvements where necessary.
• Meticulously follow company quality procedures, utilize quality tools, and create additional tools to improve quality performance.
• Represent the company at job fairs and business development events, including prospective client meetings and industry events; proactively maintain client relationships.
• Act as primary business owner of contracts.
• Engage in long‑range tactical planning on multiple projects, including tracking and budgeting.
• Maintain compliance with applicable laws, regulations, and required permits; consult with engineers concerning design modifications for projects and respond to inquiries concerning civil and engineering laws and practices.
• May act as a team leader by interviewing and recommending for hire, assigning, overseeing, and reviewing work, and training new employees.
• Work with the Human Resources Coordinator to hire new engineering talent and conduct performance reviews with existing employees.
• Direct and supervise other engineer’s activities.
• Lead preparation of project proposals and participate in bid walks.
• Serve as a designated client contact.
• Exercise independent initiative and judgement in setting and implementing goals.
• Independently identify complex problems and devise optimal and innovative solutions.
• When needed, an Engineer III may perform the responsibilities identified in the Engineer II job description.
• Perform other duties as assigned.

• Consistently demonstrates high levels of mechanical engineering technical knowledge, ingenuity, and creativity.
• Advanced knowledge of mechanical engineering principles and practices and the ability to apply them.
• Proven experience in solving complex problems, identifying alternative solutions, and implementing recommendations to support goals.
• Ability to generate clear and effective proposals and cost estimates.
• Ability to lead a team, or teams, of engineers, field survey crews, designers, and/or drafters to complete tasks on one or more projects.
• Ability to plan, organize, and direct the performance of a team, or teams, and the resources provided to them.
• Ability to support and carry out the various policies and procedures of the organization.
• Ability to thrive in a deadline‑driven environment.
• Ability to prioritize tasks based on impact.
• Ability to be flexible and adaptable to changing priorities.
• Demonstrates the ability to manage certain aspects of projects within the confines of approved budgets.

Please visit Cornerstone Energy Services’ Careers page or email mja for more information.