Project Administrative Assistant

Project Administrative Assistant

Mortenson is currently seeking Project Administrative Assistant with the ability to interact with a variety of staff at all levels in an ever-changing environment, remaining flexible, resourceful, proactive, and efficient with a high level of professionalism and confidentiality. The ideal candidate will be experienced in handling a wide range of administrative and executive support tasks with an ability to work independently or with little supervision.

Responsibilities

• Perform clerical tasks and operate basic office equipment
• Handle incoming calls and providing general information, forward calls to the appropriate party and take messages as required
• File and maintain written records along with creating electronic copies for records
• Receive, sort and log all deliveries into computer database
• Prepare daily outbound deliveries
• Prepare materials for design and construction meetings
• Record and update meeting minutes for the various site meetings
• Responsible for procurement of consumable materials and office supplies
• Support Superintendent with equipment inventory tracking and organization
• Support Superintendent with the entry of craft worker timecards
• General support for the project team as needed with various day to day tasks
• Schedule, track and log all repairs and standard maintenance for the work trucks
• Provide maps and directions to any visitors, subcontractors, deliveries or new employees
• Log all applicants into the Craft Applicant Tracking Spreadsheet

Qualifications

• An associate's degree in business or related administrative experience preferred
• Minimum of 3 years administrative experience, preferably supporting a large number of team members
• Proficiency in working on the computer in Microsoft Office, Excel, Email and Calendar systems, and PowerPoint
• Strong working knowledge of basic office equipment
• Strong communication skills both written and verbal
• Ability to be highly organized

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 $51,000 - $68,900 (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.

Job Info

• Job Identification 23757
• Job Category Project Support
• Posting Date 09/11/2026, 04:07 PM
• Job Schedule Full time
• Locations 3083 Walnut St, Denver, CO, 80205, US