INTERN

FEED

UNKNOWN

In infrastructure, we specialize in general heavy civil construction, underground utilities, structures, electrical work, material production, roadways, bridges, specialty pavement overlays, environmental projects and commercial buildings. Overview: William Charles Construction, part of MasTec’s Clean Energy and Infrastructure Group, is in search of Construction Field Engineer Interns for the Summer 2026 to support ourRockford, IL office/project.

HOUR

William Charles Construction

Intern - Field Engineer

[AW]-iCims

FULL_TIME

In infrastructure, we specialize in general heavy civil construction, underground utilities, structures, electrical work, material production, roadways, bridges, specialty pavement overlays, environmental projects and commercial buildings. The Project Engineer will assist the Project Manager and Estimator with the day to day administrative functions associated with Project Management and Estimating to ensure that each estimate is prepared accurately and each project is completed on time and within the estimated budget.

YEAR

Project Engineer

Serve as the primary substation design subject matter expert for assigned projects and coordinate technical inputs from engineering consultants, procurement, estimating, scheduling, NERC support, revenue metering, security, and other specialty subcontractors. In addition, candidate introductions or resumes can only be submitted to our internal talent acquisition recruiting team if a signed vendor agreement is already on file and the third-party recruiter or agency has received formal instructions from our internal talent acquisition team to submit candidates for a particular job posting.

SOLV Energy LLC

Design Engineer II, High Voltage (Remote)

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In addition, candidate introductions or resumes can only be submitted to our internal talent acquisition recruiting team if a signed vendor agreement is already on file and the third-party recruiter or agency has received formal instructions from our internal talent acquisition team to submit candidates for a particular job posting. SOLV Energy is a leading provider of infrastructure services to the power industry, designing, building and maintaining utility scale solar, battery storage and high voltage substation projects nationwide.

Senior BESS Engineer (Remote)

We are proud and excited to offer summer internships for 2027 across several of our different office locations and are currently seeking an Energy Engineer Intern to join our Energy team in Chicago, Il. Intermediate knowledge of Microsoft Office Suite - Word, Excel, PowerPoint, Outlook, and Visio required; working knowledge of SharePoint and MS Project preferred.

McKinstry Co.

Energy Engineer Intern

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What you'll do: As part of our Microgrid Controls Team, you will design, develop, test, implement and commission Microgrid Control solutions consisting of Solar Photovoltaic (PV), Battery Energy Storage Systems (BESS), Diesel/Natural Gas and Generators for our customers, using Automation Controllers, HMI's, Multi-function Protection Relays, and Data Concentrators from all major OEM's. After making a conditional offer and running a background check, if Eaton is concerned about conviction that is directly related to the job, you will be given the chance to explain the circumstances surrounding the conviction, provide mitigating evidence, or challenge the accuracy of the background report.

Eaton is a power management company with 2016 sales of $19.7 billion. We provide energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton is dedicated to improving the quality of life and the environment through the use of power management technologies and services. Eaton has approximately 95,000 employees and sells products to customers in more than 175 countries. For more information, visit <a href="http://www.eaton.com/Eaton/index.htm" target="_blank">Eaton.com.</a>

Eaton Corporation

Senior Microgrid Controls Engineer

What you'll do: Own plant protection, controls, and compliance strategy by reviewing and coordinating protection settings across OCPDs, relays, inverters, and plant controllers; managing required setting changes with third-party vendors; and securing utility approvals to ensure safe, reliable operation. Lead data-driven reliability and loss reduction efforts by analyzing inverter logs, relay events, EMS dispatch data, and waveform captures; conducting root-cause and 8D investigations; quantifying production and financial impacts; and recommending corrective actions, upgrades, or repowering strategies.

Nexamp Inc

Senior Electrical Engineer, Performance Engineering

Engineering expertise includes grid interconnections and auxiliary electrical systems, with experience in generators, motors, solar PV, inverters, battery energy storage systems (BESS), transformers, switchgear, motor control centers, bus duct systems, variable frequency drives, station batteries, and UPS systems. Understands project life cycle, feasibility studies, competitive bidding of large power plants, engineering and construction of large power plants, commissioning, and operations phase of the plant.

Kimley-Horn and Associates Inc

Electrical Engineer Power Generation

Lead the technical assessment of vendor qualification and approved vendor list decisions, including evaluation of cell chemistry, BMS, PCS, thermal management, and integration architecture, and support equipment procurement through product specification reviews, performance guarantee evaluations, factory audits, manufacturing walkthroughs, and monitoring of emerging storage technologies to inform strategic roadmap. Serve as Nexamp's internal subject matter expert on energy storage safety, fire protection, and code compliance, with deep knowledge and application of NFPA 855 and NEC and familiarity with UL 9540, UL 9540A, UL 1973, UL 1741, and UL 1642, while partnering with Development, Permitting, and Engineering on AHJ engagement, permitting strategy, emergency response planning, hazard mitigation analysis, and multi-jurisdiction compliance.

Lead Energy Storage Engineer

As a structural engineer, you will work on project teams to create world class designs for new projects, alterations and redevelopments on a variety of power generation and industrial projects. Applies strong knowledge of commonly used structural engineering/design concepts, principles, practices, codes, and procedures within the structural engineering services industry.

Burns & McDonnell

structural-engineer-power-chicago

With 25 years of trusted execution, we deliver reliable, affordable energy through a diverse portfolio that includes natural gas, solar, land-based wind, energy storage, transmission, and domestic manufacturing. In this capacity, you will be responsible for providing and improving Invenergy's technical expertise of its fleet of operating inverters in order to maximize the performance and reliability of its solar and storage assets.

Invenergy LLC

Electrical Engineer II (Inverters), Operations Engineering

Lead complex technical implementations and enhancements, including workflow design, scripting, integrations, data models, and performance tuning; serve as technical lead for small to medium initiatives and lead engineering workstreams within larger programs. This role partners closely with platform leadership, process owners, architects, and cross‑functional IT teams to translate platform strategy into durable technical designs, configurations, integrations, and operational practices that deliver measurable business value.

Invenergy

ServiceNow Platform Engineer

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Servicenow Platform Engineer

Performance Engineer II (Remote)

This role includes evaluating soil, rock, and groundwater conditions; performing analyses; and preparing clear reports that support safe, efficient, and cost-effective design and construction. Coordinate with clients, project managers, design engineers, and field/lab staff to support scope, schedule, and deliverables.

Midland Standard Engineering & Test

Geotechnical Engineer

OTHER

Kimley-Horn keeps two groups of people at the center of its business: its clients and its staff. Past president Ed Vick said, "We have no reason to exist except to serve our clients." That intense focus on providing quality to the people we serve has made Kimley-Horn one of the nation's top consulting firms in every discipline we practice. 
 
 

But the firm's core purpose, articulated by its leadership and lived out daily, is "to provide an environment for our people to flourish." We know that people are fulfilled, motivated, and challenged in different ways. In order to foster our individual aspirations, we support our people as they grow into roles and take on responsibilities that are important to them. Growing professionally, having fun with our colleagues, and finding satisfaction in our work are central to our way of life. 
 

To that purpose we add core values: "honesty, integrity, and ethics; exceptional client service; high expectations; sharing and caring; sustained profitability." Our core values and core purpose provide a foundation for the way we approach our business. Our vision is long-term and our expectation is always to perform with quality, for the sake of both groups at the center of our firm. 
 
 
Through their work, our people discover untapped talents and interests. At Kimley-Horn we work hard to allow that to happen. We have college students who started as traffic engineers now working on ITS projects. We have former administrative assistants who are now human resources professionals and former marketing coordinators who are now transportation planners. 
 
 
We provide the environment. We want you to take advantage of it and flourish!

Kimley-Horn

Electrical Engineer - Power Generation

Assist in maintaining all project related reports Assist in preparing project closing documents Review construction documents and compete take offs and assist in obtaining procing for materials and subcontractors, including DBE subcontractors Assist in preparing CPM schedules using estimated productions Attend pre-bid meetings Make pre-bid site investigations Assist in preparing QA/QC plans Maintain and submit QA/QC records in accordance with the QA/QC plans Qualifications Associate's or Bachelor's Degree in Civil Engineering, Construction Management, or related field preferred. The Project Engineer will assist the Project Manager and Estimator with the day to day administrative functions associated with Project Management and Estimating to ensure that each estimate is prepared accurately and each project is completed on time and within the estimated budget.

MasTec Inc

We take pride in maintaining a team-oriented, family-like work environment while focusing on safety, production, quality, and timeliness. We work with coal mines, landfills, quarries, the U.S. Army Corps of Engineers (USACE), and other organizations throughout the region.

Oak Hill Contractors LLC

Heavy Haul Truck

Talent Acquisition

Specific duties include, but are not limited to, contract administration, schedule management, preparation of spreadsheets & reports, maintaining budget & cost reports, financial analysis, investigation of non-conformance issues and implementation of corrective measures, risk management, safety, and quality control. Important Interview Policy: To ensure a focused conversation and protect the privacy of both our candidates and team members, the use of AI note-takers, recording devices, or real-time transcription software is strictly prohibited during this interview.

Solar Engineer Jobs in Illinois

Intern - Field Engineer William Charles Construction

Project Engineer William Charles Construction

Design Engineer II, High Voltage (Remote) SOLV Energy LLC

Senior BESS Engineer (Remote) SOLV Energy LLC

Energy Engineer Intern McKinstry Co.

Senior Microgrid Controls Engineer Eaton Corporation

Senior Electrical Engineer, Performance Engineering Nexamp Inc

Electrical Engineer Power Generation Kimley-Horn and Associates Inc

Lead Energy Storage Engineer Nexamp Inc

structural-engineer-power-chicago Burns & McDonnell

Electrical Engineer II (Inverters), Operations Engineering Invenergy LLC

ServiceNow Platform Engineer Invenergy

Servicenow Platform Engineer Invenergy

Performance Engineer II (Remote) SOLV Energy LLC

Geotechnical Engineer Midland Standard Engineering & Test

Electrical Engineer - Power Generation Kimley-Horn

Project Engineer MasTec Inc

Heavy Haul Truck Oak Hill Contractors LLC

Project Engineer - Illinois CoVolt Power

Intern - Field Engineer MasTec Inc

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