Administrative Assistant

Are you someone who enjoys connecting with people, takes pride in staying organized, and looks for ways to make things better? Do you thrive in an environment where every day brings something different?

Interstate Engineering is looking for an outgoing, motivated, and detail-oriented Administrative Assistant to join our Mandan office.

We're looking for more than someone who can manage a calendar or answer the phone. We want someone who takes initiative, builds relationships, brings positive energy to the workplace, and sees opportunities to contribute without waiting to be asked.

As an employee-owned company focused on growth, innovation, and serving communities, we value people who are excited to learn, take on new challenges, and grow alongside us.

What You'll Do

As an Administrative Assistant, you'll play an important role in keeping our Mandan office running smoothly while supporting employees, clients, and visitors.

Your responsibilities will include:

• Be the face of our office. Welcome visitors, answer calls, and create a friendly, professional first impression for everyone who walks through our doors.

• Keep things moving. Coordinate schedules, organize meetings, manage correspondence, and help employees stay organized and productive.

• Support our teams. Work alongside engineers, surveyors, planners, and other professionals to assist with documents, reports, contracts, and project-related administrative tasks.

• Take ownership. Anticipate needs, identify opportunities for improvement, and take initiative to help the office operate more efficiently.

• Bring people together. Help coordinate office activities, company events, meetings, and new employee onboarding.

• Stay on top of the details. Maintain records, process invoices and expenses, assist with document management, and support day-to-day office operations.

• Keep learning. Build new skills, collaborate with employees across our offices, and explore opportunities to grow within the company.

What We're Looking For

The right person brings more than administrative experience. They bring the attitude, initiative, and willingness to contribute that make a great team even better.

You'll be a great fit if you:

• Are naturally welcoming, approachable, and comfortable starting conversations with others.

• Take initiative and look for solutions instead of waiting for direction.

• Enjoy helping others and take pride in being someone your teammates can count on.

• Can juggle multiple priorities, stay organized, and follow through on commitments.

• Communicate confidently and professionally, both in person and in writing.

• Are adaptable, open to feedback, and excited to learn new things.

• Have a growth mindset and see challenges as opportunities to improve.

• Enjoy working collaboratively but are also comfortable managing responsibilities independently.

Preferred Qualifications:

• 3–5 years of administrative or office support experience.

• Proficiency in Microsoft Office, including Word, Excel, Outlook, and PowerPoint.

• Strong organizational, communication, and time management skills.

• An associate's degree in Business Administration or a related field is a plus.

Why Interstate Engineering?

At Interstate Engineering, we're more than a team of engineers, surveyors, planners, and technical professionals. We're employee-owners working together to deliver quality solutions that help communities thrive.

We believe great ideas can come from anyone, and every role contributes to our success. We value people who are dependable, willing to help, eager to learn, and ready to make a difference.

As our company continues to evolve, we want employees who are excited to grow with us, both personally and professionally.

This is an on-site position in our Mandan office. Being present, building relationships, and providing a welcoming experience for employees and visitors are essential parts of this role.

Ready to Make an Impact?

If you're the kind of person who sees something that needs to be done and takes action, enjoys being part of a team, and wants a position where your contributions matter, we'd love to meet you.

Apply today and grow your career with Interstate Engineering.

As Interstate Engineering celebrates 50 years, we’re proud of the legacy we’ve built and even more excited about what’s ahead. Our experience spans generations, with team members who have grown their careers here and continue to shape the future of our firm, including employee-owners who have been part of our story from the very beginning.

As a 100% employee-owned company, we believe the best results come from a collaborative, team-driven approach. From the projects we deliver to the careers we build, we work together to solve challenges, support one another, and create lasting impact in the communities we serve.

Interstate Engineering provides innovative engineering, surveying, and planning solutions across the Midwest, combining decades of experience with forward-thinking ideas. We invest in our people because we know they are the foundation of our success fostering a culture built on trust, integrity, and continuous growth.

At the end of the day, our team is made up of the professionals you need and the people you trust.

• Competitive wages
• Bonus opportunities
• Flexible schedule
• Continued education
• Professional development
• Family-oriented environment
• Prioritized work/life balance
• Paid holidays
• Travel opportunities
• 100% paid health insurance for employee
• Dental, vision, & life insurance
• Short & long-term disability insurance
• 401K Profit Sharing
• ESOP (Employee Stock Ownership Program)
• Relocation assistance (if required)