Administrative Assistant
Mortenson
Listing collected from Mortenson's career site. NextChapter is independent of Mortenson.
MN, United States · Posted October 12, 2026
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Pay compared with the market
This listing does not state pay. Across 419 open administrative assistant listings that state pay, the middle half runs $37,500 to $52,000 and the median is $42,500.
Listed pay is what employers advertise, not what people are paid.
Administrative Assistant salaries by state · Check your own pay
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Among secretaries and administrative assistants, except legal, medical, and executive, AI is already used for a large share of the tasks. Measured exposure for secretaries and administrative assistants, except legal, medical, and executive: 45% (high).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
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About the job
Administrative Assistant
SUMMARY
Mortenson is currently seeking an Administrative Assistant to handle a wide range of administrative and executive support tasks. Your ability to remain flexible, inventive, dedicated, and efficient with a high level of integrity and confidentiality is vital to your success in this role. Excellent written and verbal communication skills are necessary as you will be interacting with staff at all levels in an ever-changing environment. Your extraordinary customer service abilities will ensure every customer has a superb experience when they are at Mortenson facilities.
RESPONSIBILITIES
Perform regular administrative tasks and overall office organization, greet visitors and customers with a positive demeanor, coordinate and set up meetings, handle calendars, and schedule travel
Set up, organize, and manage filing systems, prepare documents, perform record keeping and filing duties, and proofread communications and documents carefully
Prepare billing/invoices as needed, coordinate between numerous support groups (Safety, Human Resources, IT, Legal), and procure miscellaneous goods using Mortenson’s internal procurement system
Understand the operating group and company resources and assist Operating Group Leadership members with miscellaneous duties such as expense reports and travel
Perform all other duties as assigned
QUALIFICATIONS
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 Power Point
Exhibit effective communication and active listening skills
Positive professional attitude and strong customer service skills
A few benefits offered include:
(for Non-Craft & Non-Union Craft working 25+ hours / week)
Medical and prescription drug plans that includes no additional cost vision coverage
Dental plan
401k 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 $59,300.00 - $80,000.00. (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%).
Base pay is positioned within the range based on several factors including an individual’s knowledge, skills, and experience, with consideration given to internal equity.
Please make note:
Visa sponsorship is not offered for this position.
Our postings are typically open a minimum of 5 days and an average of 44 days.
ABOUT MORTENSON
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®
Equal Employment Opportunity
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.
Other Items to Note
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.