About the role#
As a Preconstruction Estimating Intern at DN, you will work on heavy-civil construction projects. You will gain hands-on experience under the guidance of an industry mentor. This role involves learning the full project lifecycle, from initial conception to completion. We are looking for someone who can work approximately 20 hours per week starting in January 2026, with additional opportunities available during the summer.
What you'll do#
- Assist Regional Estimators with evaluating project site conditions.
- Generate tank site layout drawings using AutoCAD.
- Prepare earthwork takeoffs in Civil 3D and sitework cost estimates in Excel.
- Solicit bid level pricing for subcontractors, including crane services, rebar installation, and fence work.
- Prepare Requests for Quotation for identified local subcontractors.
- Visit local tank construction sites to see projects in progress.
- Learn the process of developing and bidding construction work.
What you'll need#
- Current enrollment in an undergraduate program for Engineering or Construction Management, with a preference for Civil Engineering.
- Experience with CAD software, specifically AutoCAD.
- Proficiency in Microsoft Office, including Word, Outlook, and Excel.
- Strong time management and communication skills.
- Ability to solve problems both independently and as part of a team.
- Capacity to multi-task and manage various work assignments.
Location & details#
- This position is based in El Cajon, California.
- You must provide your own transportation to the office.
- This is a paid internship.
About DN
DN designs and builds prestressed concrete liquid storage tanks. Founded in 1929, the company focuses on water storage and wastewater infrastructure. It operates ten regional offices and three facilities across the United States. The firm employs between 501 and 1,000 people.
How to get in at DN
Securing an internship at DN requires speed, as early applicants are often reviewed before the volume of candidates becomes unmanageable. Intern Insider sends an instant alert the moment a role matching your target is published anywhere, so you apply among the first and get seen before the pile grows. You should focus on demonstrating your interest in civil engineering or construction management when you submit your materials. Intern Insider surfaces the recruiters behind the company roles so you can reach out directly to ask about the role or a referral, which materially improves response rates. Connecting with the right person at DN can help you stand out from the standard application queue.
