Senior Level Project Assistant Jobs
Senior level project assistant jobs put experienced professionals in charge of project direction, cross-functional coordination, and the operational decisions that keep complex initiatives on track. Roles are concentrated across Consulting & Professional Services and Construction & Real Estate, with a 14% remote and hybrid share, and employers like WSP, Bohler, and Haley & Aldrich hiring at this level now.
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INTRODUCTION
Colliers Engineering & Design is looking for an Assistant Project Manager - Interior Design to join our Commercial Building Engineering Services team in Philadelphia, PA! You will assist in the technical and administrative direction and supervision of projects through constant communication with the Project Manager and the client to ensure that the project is completed in accordance with the contract. May serve as Project Manager on smaller projects to develop the skills for a career path into Project Management.
Our in-house team of architects, interior designers, engineers, and planners skillfully balance design constraints with the clients’ needs and desired outcome. This creates collaborative, dynamic and timeless designs. Our professionals also provide mechanical, electrical, and plumbing (MEP) design; programming, corporate branding, standards integration, workstation specification, facilities and construction management support, energy solutions, and LEED certification. We take pride in delivering results that are innovative, sustainable and award winning.
This multidisciplinary coordination supports clearer communication and more cohesive outcomes across commercial, workplace, healthcare, education, hospitality, and mixed-use environments. By evaluating decisions within the full project context, we help reduce rework and maintain alignment from concept through construction.
ROLE AND RESPONSIBILITIES
- Assist in preparation of effective work plans and labor budgets for approval by supervisor.
- Monitor time schedules and capital cost budgets on projects to satisfy client.
- Oversee the work and productivity on assigned projects.
- Strive to achieve predetermined goals for profit, productivity targets, and schedule of deliverables.
- Participate in or hold team meetings ensuring procedures governing the review and approval of projects are followed prior to submission of completed work.
- Negotiate with clients on any scope changes relative to project budgets and schedules subject to supervisor's approval.
- Ensure all project work is performed and completed in accordance with QA/QC standards, systems and procedures as designated for project.
- Coordinate and communicate effectively with all employees involved in the project to ensure high utilization rates (i.e. Project team meeting).
- Review monthly labor and cost reports to ensure projects are being completed at the pre-established goal.
- Assist with mentoring junior staff in learning sound technical and business practices and enhancing corporate objectives.
- Assist with the preparation for public hearings, meetings and any other presentations in relation to current projects.
- Works efficiently with the Billing Department to authorize and transmit bills to client. Follows up with clients for timely payments.
- Adhere to Health and Safety program and all applicable SOPs.
- May oversee the activities of assigned staff, including but not limited to timesheet review and approval, performance evaluation and daily supervision.
BASIC QUALIFICATIONS
- Bachelor's and/or Master's Degree in Architecture or Interior Design or equivalent work experience as required to maintain licensed architect status.
- 8+ years of experience as an Interior Designer on commercial related projects.
- Certified Interior Designer (NCIDQ) and/or AIA licensure in the state of Pennsylvania preferred.
- Prior experience in Revit is required.
- AutoCAD, Adobe Creative, and SketchUp experience is a plus.
- Excellent interpersonal and customer service skills with the ability to effectively work well with all employees and managers.
- Previous business development and project management experience preferred in planning and executing design/construction projects.
- Ability to work in close collaboration with other managers and leadership, clients, in-house and outside consultants.
- Client facing experience.
- Ability to work primarily independently.
- Willing to travel occasionally to client sites and meetings.
- Ability to read, write and understand English for purposes of comprehending written job-related communications and verbal instructions and interactions.
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Top Industries Hiring
- Consulting & Professional Services
- Construction & Real Estate
Senior Level Project Assistant Jobs: Frequently Asked Questions
How do I get a senior level project assistant job?
Employers at this level look for candidates who have owned project timelines end to end, managed stakeholder relationships independently, and stepped into a lead role when a project needed direction. Concrete examples of scope delivered, problems resolved without escalation, and junior staff you have guided will carry more weight than credentials alone. Tailor your application to show ownership, not just participation.
Which companies hire senior level project assistants?
Companies hiring senior level project assistants right now include WSP, Bohler, and Haley & Aldrich, based on current listings on Migrate Mate as of September 2026. Hiring at this level tends to come from organizations running multi-phase programs or large operational portfolios where experienced project support is essential to keeping delivery on schedule.
Are there remote senior level project assistant jobs?
Yes, though availability varies by industry and employer. About 14% of senior level project assistant openings are remote or hybrid as of September 2026, reflecting continued demand for experienced professionals who can coordinate distributed teams and manage project workflows without on-site oversight. On-site roles remain common in sectors with hands-on operational requirements.
What makes a project assistant role senior level?
A senior level project assistant role is defined by the scope of ownership it carries. Where mid-level roles support execution, senior roles drive it, including setting priorities, resolving cross-team conflicts, representing the project in stakeholder meetings, and mentoring less experienced team members. The expectation is that you operate with minimal direction and deliver outcomes, not just tasks.
Which industries hire the most senior level project assistants?
Senior Level project assistant roles concentrate in Consulting & Professional Services and Construction & Real Estate, based on current listings on Migrate Mate as of September 2026. These sectors tend to run large, multi-workstream programs where experienced project professionals are needed to maintain alignment across teams, manage documentation at scale, and support senior leadership through complex delivery cycles.