Intern - Field Engineer & Estimator

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 our Rockfield, IL office. The Field Engineer Intern will focus on assisting with providing support to the Project Manager and Construction Manager of their assigned project. This position will also include estimating. General responsibilities include assisting with implementation of the project specific Quality Plan, site specific plans, material inventory and receiving.

Travel & Location: This is a field/office position encompassing work sites in Rockford, Illinois.  

Company Overview:

With more than a century of exceptional work on our resume, William Charles Construction remains guided by the pursuit of excellence. Our “Do it Right the First Time” work ethic has been the cornerstone of our business philosophy since 1892. With our broad background in heavy civil construction, environmental management and mining and materials production, we have the expertise to help our customers complete their most complex projects. 

MasTec’s Clean Energy & Infrastructure (CE&I) segment generates over $4 billion in annual revenue, providing construction services across industrial, renewables and infrastructure sectors. Our industrial expertise includes building products manufacturers, decarbonization, power generation facilities, manufacturing plants and mining. 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. Our renewables sector focuses on solar, wind and battery storage. Sustainability and safety are foundational to our culture and influence everything we do. 

MasTec, a minority-owned Fortune 500 company, has shaped the construction industry for more than 90 years. With over 35,000 employees and 400 offices nationwide, we provide flexibility and career growth in dynamic work environments. 

• Performs field survey work regarding layout and tracking of work activities, utilizing PC based software and GPS station/field equipment.
• Assist with managing project specific quality control records and ensuring that required reporting is accomplished.
• Assist with planning, scheduling, and coordinating to ensure that all required audits/inspections are performed and documented.
• Assist with material inventory and receiving paperwork.
• Assist with final job closeout, as-builts, job binder creation.
• Assist with subcontractor scheduling and management.
• Assist with RFI (Request for Information) submittals.
• Extended work hours and weekend work may be required.
• Will provide other duties as assigned.

Education:

• Currently pursuing undergraduate, four-year degree in Civil Engineering, Construction Management or Occupational Safety and Health/Environmental Safety and Health
• Other applicable degrees include:  Electrical/Mechanical Engineering

Requirements:

• Comfortable with exposure to dirt, heat and noise
• 100% Project Specific travel is required
• Minimum GPA of 3.0
• 24 hours of college credits completed
• Have a basic understanding of the construction industry and accepted business practices 

Competencies Required:

• Strong work ethic
• Ability to work within a team
• Deadline Oriented
• Problem Solving
• Written and Oral Communication
• Adaptable and willing to learn  

Compensation $18-$21 /hour.  This is a temporary position, no company benefits are offered. 

Position may be subject to pre-employment screening, which may include background check and drug testing. Accessibility: If you need accommodation as part of the employment process, contact ceicareers@mastec.com. Due to the high volume of applications received, we are unable to respond to individual requests regarding application status. Please log into your candidate profile for up-to-date information. 

MasTec, Inc. is an Equal Employment Opportunity Employer. The Company's policy is not to unlawfully discriminate against any applicant or employee on the basis of race, color, sex, sexual orientation, gender identity, religion, national origin, age, disability, genetic information, military status, or any other consideration made unlawful by applicable federal, state, or local laws. The Company also prohibits harassment of applicants and employees based on any of these protected categories. It is also MasTec's policy to comply with all applicable state, federal and local laws respecting consideration of unemployment status in making hiring decisions.

MasTec Clean Energy & Infrastructure and our subsidiaries do not work with any third-party recruiters or agencies without a valid signed agreement and partnership with the Corporate Talent Acquisition Team.

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