Preconstruction Estimating Intern at DN Tanks | El Cajon, CA

dnllc has spent over 90 years designing and building pre-stressed concrete liquid storage tanks, with a focus on protecting vital water resources. The company has delivered more than 3,500 tanks worldwide, centering its work on liquid storage design and construction. Quality, reliability, and long-term value guide every project. Role overview The Mechanical Engineering Technician position is based in El Cajon, CA. This role supports the design, development, diagnostics, and testing of equipment, tools, engines, and machinery used across dnllc. Daily work includes hands-on problem solving and close collaboration with other teams to improve existing equipment and help bring new products from concept to production. Key responsibilities Design, develop, and test equipment, tools, engines, and mechanical systems Diagnose and address engineering challenges as they arise Work with multiple teams to enhance equipment performance Support the transition of new products from concept to production Take ownership of mechanical engineering for all company equipment Optimize mechanical systems for efficiency and reliability What dnllc looks for Interest in machinery and mechanical systems Ability to tackle complex engineering issues Hands-on approach to problem solving Strong collaboration skills across teams Desire to take responsibility for mechanical engineering projects Location El Cajon, CA

At dnllc, our culture is anchored in a collective vision — to safeguard the world’s most invaluable resource — coupled with the core values that drive us as we work towards this vision and fulfill our mission to our clients.We pride ourselves on delivering top-tier liquid storage design and construction services, offering the best long-term value with an unparalleled customer experience. Over the last 90 years, we have successfully constructed over 3,500 pre-stressed concrete liquid storage tanks globally, establishing ourselves as the industry leader in quality and innovation.dnllc is on the lookout for a talented and forward-thinking Mechanical Engineer to join our dynamic team. In this role, you will design, develop, and rigorously test a variety of equipment, including tools, engines, and machinery. You will collaborate cross-functionally with different teams to not only maintain and enhance the performance of existing equipment but also to drive new products from concept to production, optimize mechanical systems, and apply hands-on solutions to complex engineering challenges. If you have a passion for machinery and a proactive approach to engineering problem-solving, we encourage you to apply!

Join our dynamic team at BMW of El Cajon as an Automotive Technician! We are seeking skilled individuals who are passionate about automotive technology and dedicated to providing exceptional service. As a vital part of our service department, you will be responsible for diagnosing and repairing vehicles to the highest standards. This position offers a supportive work environment where your expertise will be valued.

At DN, we are driven by a unified mission: to protect the world's most vital resource. Our core values shape our commitment to this vision and guide us in fulfilling our mission for clients.We specialize in delivering premier liquid storage design and construction services, ensuring exceptional long-term value paired with an unparalleled customer experience. Over the last 90 years, we have constructed more than 3,500 pre-stressed concrete liquid storage tanks, establishing ourselves as leaders in quality and innovation within the industry.As a Structural Design Engineer Intern at DN, you will immerse yourself in the dynamic field of civil engineering and construction. Guided by an experienced mentor, you will contribute to impactful projects, hone vital skills, and gain insights into every phase of heavy-civil construction projects—from initial conception to final completion. This internship is an excellent opportunity to acquire valuable experience, shape your career, and make a significant impact in communities across the United States!

About the Role dnllc is seeking a Structural Design Engineer to help shape the future of water management infrastructure. Based in El Cajon, CA, this role focuses on designing concrete storage tanks that support essential water needs for communities and businesses nationwide. What You'll Do Design concrete storage tanks for water management projects Apply structural engineering principles to deliver durable, long-lasting solutions Contribute creative ideas and practical problem-solving to project teams Support the development of infrastructure that protects and manages vital water resources Our Approach dnllc prioritizes excellence, collaboration, and forward-thinking in every project. The team is committed to redefining structural integrity with solutions that last and serve a broad range of water needs across the country. Location El Cajon, CA

At DN Tanks, we are driven by a collective mission to protect the world's most vital resource - water.With nearly a century of experience, our company has successfully designed and constructed over 3,500 pre-stressed concrete liquid storage tanks, establishing ourselves as leaders in the industry through unmatched quality and innovation.Position Overview: As a Construction Management Intern, you will immerse yourself in the dynamic realm of civil engineering and construction. Under the guidance of an experienced mentor, you will engage in real-world projects, honing invaluable skills and gaining insights into the entire lifecycle of heavy-civil construction endeavors, from inception to completion.This internship presents a fantastic opportunity to develop your professional skills, contribute to meaningful projects, and make a significant impact on the future of water infrastructure. Requirements: We are looking for a local intern from the San Diego area who can commit to approximately 20 hours per week, beginning in January 2026.