Project Assistant Jobs in St. Louis, MO

Project assistant jobs in St. Louis are active across healthcare, higher education, construction, and professional services, with openings concentrated in the Central West End, Clayton, and downtown's Gateway District. Employers hiring right now include Mullins Mechanical, INTREN, and HTH Companies. Scan the live roles below and apply to whichever ones fit.

Find Project Assistant Jobs

Overview

Open roles41
Top employerMullins Mechanical
Work type100% On-site
Top credentialBachelor's degree in construction management
Companies hiring10

Showing 5 of 41+ Project Assistant jobs

HTH Companies
Assistant Project Manager
We won't show you this job again
HTH Companies
Added 3d ago
Assistant Project Manager
HTH Companies
St. Louis, Missouri
Construction Management
Program Management
Project Management
$60k - $80k/yr
501-1,000

Have you applied for this role?

INTREN, LLC
Assistant Project Manager
We won't show you this job again
INTREN, LLC
Added 3d ago
Assistant Project Manager
INTREN, LLC
St. Louis, Missouri
Business Operations
Performance Marketing
Project Management
On-Site
Bachelor's degree in construction management

Have you applied for this role?

Unified Door & Hardware Group
Project Assistant
We won't show you this job again
Unified Door & Hardware Group
Added 4d ago
Project Assistant
Unified Door & Hardware Group
St. Louis, Missouri
Business Operations
Office Management
Project Management
High school diploma or GED
201-500

Have you applied for this role?

Keeley Construction
Assistant Project Manager (Civil Construction)
We won't show you this job again
Keeley Construction
Added 5d ago
Assistant Project Manager (Civil Construction)
Keeley Construction
St. Louis, Missouri
Executive Leadership & C-Suite
Program Management
Project Management
Bachelor's degree in construction management
1-50

Have you applied for this role?

Mullins Mechanical
Assistant Project Manager (Onsite) - St Louis
We won't show you this job again
Mullins Mechanical
Added 1w ago
Assistant Project Manager (Onsite) - St Louis
Mullins Mechanical
St. Louis, Missouri
Business Operations
Executive Leadership & C-Suite
Project Management
On-Site
Bachelor of Science

Have you applied for this role?

See All 41 Project Assistant Jobs in St. Louis

Find roles in St. Louis that match your experience and apply in just a few clicks.

Find Project Assistant Jobs

Project Assistant Job Market in St. Louis

Who's Hiring

Mullins Mechanical
Mullins Mechanical7 open roles
INTREN
INTREN4 open roles
HTH Companies
HTH Companies4 open roles

Project Assistant Jobs in St. Louis: Frequently Asked Questions

How do I get a project assistant job in St. Louis?

Target the sectors doing the most hiring in St. Louis: healthcare systems, university research offices, architecture and engineering firms, and large nonprofit organizations. Roles cluster in Clayton, the Central West End, and downtown. Candidates who can show experience with scheduling tools, document management, or coordinating across departments stand out. Applying directly to hospital networks and regional construction firms often gets faster responses than broader searches.

Which companies hire project assistants in St. Louis?

Companies currently hiring project assistants in St. Louis include Mullins Mechanical, INTREN, and HTH Companies, per current listings on Migrate Mate as of September 2026. St. Louis draws project assistant demand from a mix of Fortune 500 corporations, regional healthcare networks, and mid-size engineering and architecture firms headquartered in the metro area.

Are there remote project assistant jobs in St. Louis?

Yes, though availability depends heavily on the role type: desk-based and administrative project assistant positions are more likely to be remote, while construction, lab, or facilities-focused roles almost always require on-site presence. About 0% of project assistant openings tied to St. Louis are remote or hybrid as of September 2026. Research, compliance, and program coordination roles within St. Louis's higher education and healthcare sectors tend to offer the most remote flexibility.

How can I get a project assistant job in St. Louis with little or no experience?

The most realistic entry path in St. Louis is through administrative or coordinator roles at one of the city's large hospital systems or university research offices, which regularly hire at the entry level and promote from within. Internships at regional architecture, engineering, or nonprofit organizations also convert frequently to full-time project assistant roles. Familiarity with project tracking software and strong organizational skills carry more weight locally than formal credentials alone.

See All 41 Project Assistant Jobs in St. Louis

Find roles in St. Louis that match your experience and apply in just a few clicks.

Find Project Assistant Jobs