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As a Project Engineer Intern in our Environmental Group, you will gain hands‐on experience supporting the planning and execution of projects that improve water quality and restore ecosystems. This is a Summer 2026 internship or 6‐month co‐op opportunity that requires 100% travel to project sites across the United States, where you'll learn alongside seasoned engineers and environmental professionals.

You'll be exposed to projects such as:

• Environmental dredging of contaminated sediments
• In‐situ capping of waterways
• Rapid dewatering techniques
• Wetland and shoreline habitat restoration

What you'll learn & do:

• Assist with project administration, scheduling, and documentation.
• Support contract management, change orders, and reporting.
• Assist with data collection, surveying, and environmental monitoring.
• Gain exposure to estimating, cost tracking, and project management software.
• Learn Brennan's approach to safety, efficiency, and collaboration.

What we're looking for:

• Pursuing a degree in Civil/Environmental Engineering, Construction Management, GIS or related field.
• Interest in heavy civil/marine construction or hydrographic surveying.
• Passion for sustainability and restoring waterways.
• Willingness to travel nationwide and work in the field.
• Excellent verbal and written communication skills.
• Proficient in Microsoft Office, on computers and other electronic devices.
• Strong interpersonal skills; must be a self‐starter, highly organized, and creative.
• Superior time management and organizational capabilities, including the ability to accurately benchmark project length and deliver on deadlines.

Who is Brennan?

J.F. Brennan Company, Inc. (Brennan) is a 100‐year‐old, family‐owned company that specializes in water‐based environmental remediation and marine construction headquartered in La Crosse, WI that offers our employees growth, challenging work, empowerment, and meaningful work. Brennan is known for tackling complex maritime projects, providing unique solutions through teamwork and collaboration, and maintaining a family‐oriented culture.

• Our culture sets us apart. We strive to make our company the best possible place to work. We work hard to continue to build a culture in which every individual is important and the key to our success.
• Our focus on safety and quality is unmatched in the industry, and our ability to innovate has enabled us to succeed.
• We are a family‐focused company and are determined to provide a rewarding career that offers above‐average compensation.
• We offer an industry‐leading benefits package. We are proud to offer our employees and their families group health, dental and vision insurance plans, 401(k) program with generous matching, annual bonus eligibility and profit‐sharing program.

J.F. Brennan Company, Inc. is an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability status, protected veteran status or any other characteristic protected by law.

Notice to Staffing Agencies

J.F. Brennan Company Inc. ("Brennan") and its subsidiaries will not accept unsolicited resumes from any source other than directly from a candidate. Any unsolicited resumes sent to Brennan, including unsolicited resumes sent to a Brennan mailing address, fax machine or email address, directly to Brennan employees, or to Brennan's resume database will be considered Brennan property. Brennan will NOT pay a fee for any placement resulting from the receipt of an unsolicited resume. Brennan will consider any candidate for whom an Agency has submitted an unsolicited resume to have been referred by the Agency free of any charges or fees. Agencies must obtain advance written approval from Brennan's recruiting function to submit resumes, and then only in conjunction with a valid fully executed contract for service and in response to a specific job opening. Brennan will not pay a fee to any Agency that does not have such an agreement in place. Agency agreements will only be valid if in writing and signed by Brennan's Chief Human Resources Officer or his/her designee. No other Brennan employee is authorized to bind Brennan to any agreement regarding the placement of candidate by Agencies.

Accessibility: If you need an accommodation as part of the employment process please contact Human Capital at:

Equal Opportunity Employer, including disabled and veterans.

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