Administrative Assistant

Overview

Mortenson is currently seeking an Administrative Assistant who will support a wide range of administrative and executive-level tasks in a fast‑paced, ever‑changing environment. Success in this role requires flexibility, creativity, efficiency, and a high level of integrity and confidentiality. Strong written and verbal communication skills are essential, as this role regularly interacts with team members and leaders at all levels of the organization.

Exceptional customer service skills are critical to ensuring a positive and professional experience for all visitors and internal partners at Mortenson facilities.

• Perform regular administrative tasks and maintain overall office organization, greet visitors and customers with a positive demeanor, coordinate and set up meetings, handle calendars, and schedule travel.
• Support onboarding coordination by partnering with managers to ensure a seamless new hire experience, including workspace setup, applicable technology, and a 90‑day onboarding calendar; support a successful transition to project sites.
• Integrate operating group‑specific onboarding experiences that supplement the company onboarding program and address group‑specific needs, challenges, and engagement opportunities.
• Set up, organize, and manage filing systems; prepare documents; maintain records; and proofread communications and materials with strong attention to detail.
• Prepare billing and invoices as needed and support timekeeping‑related activities.
• Coordinate across multiple internal support groups, including Risk Management, Preconstruction, Human Resources, Legal, Environmental Health & Safety, and ITS.
• Procure miscellaneous goods using Mortenson’s internal procurement systems.
• Oversee shipping and receiving for UPS and other deliveries.
• Develop an understanding of the operating group and company resources to effectively support Operating Group Leadership and team members with tasks such as expense reports, travel coordination, technology needs, and general administrative support.
• Build effective working relationships across all levels of the organization and navigate diverse personalities and backgrounds.
• Perform all other duties as assigned, recognizing that responsibilities may evolve due to the dynamic and cyclical nature of the construction business.

• Associate or bachelor’s degree preferred.
• Minimum three years administrative support experience required.
• Detail orientation and the capability to proofread effectively.
• Demonstrate flexibility as well as excellent organization and multi‑tasking skills.
• Display proficient skills in Microsoft Word, Excel, Outlook, and PowerPoint.
• Exhibit effective communication and active listening skills.
• Positive professional attitude and strong customer service skills.
• Construction‑related business experience preferred.
• Experience with billing, invoicing, and timekeeping preferred.

• Medical and prescription drug plans that include no additional cost for vision coverage.
• Dental plan.
• 401(k) retirement plan with a generous Mortenson match.
• Paid time off, holidays, and other paid leaves.
• Employer paid Life, AD&D, and disability insurance.
• No‑cost mental health tool and concierge with extensive work‑life resources.
• Tuition reimbursement.
• Adoption assistance.
• Gym membership discount program.

The base pay range for this role is $59,300 MIN – $80,000 MAX. (Actual range is higher for the following office locations: Denver, CO and Chicago, IL – 5%, Seattle, WA, and Portland, OR – 10%, Washington, D.C. – 12.5%).

• Visa sponsorship is not offered for this position.
• Our postings typically open a minimum of 5 days and an average of 44 days.

As a top builder, developer, and EPC (Engineering, Procurement, and Construction), our expertise spans markets like sports, renewable energy, data centers, healthcare, and more. We are builders at heart, working to ensure the built environment has a lasting positive impact. Let’s Redefine Possible®

Your uniqueness brings new and creative perspectives to the team. Mortenson is committed to providing equal opportunities of employment (EOE) to all individuals, regardless of your race, religion, gender, national origin, age, veteran status, disability, marital status, or any other legally protected category.

• Mortenson reserves the right to hire any individual without legal or financial obligation on unwanted solicitations. No agency emails, calls, or solicitations are accepted without a valid agreement.
• Must be currently legally authorized to work in the U.S. without sponsorship for employment visa status (e.g., H1B status, 0‑1, TN, CPT, OPT, etc.). We are unable to sponsor or take over sponsorship of an employment visa at this time.