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Project Assistant Jobs in Ontario, OR (NOW HIRING)

Heavy Civil & Excavation Assistant Project Manager LaRiviere, Inc. is looking for a motivated assistant project manager to work with project managers and field personnel supporting projects for our ...

Heavy Civil & Excavation Project Coordinator LaRiviere, Inc. is looking for a motivated project coordinator to work with project managers and field personnel supporting projects for our excavation ...

Heavy Civil & Excavation Project Coordinator LaRiviere, Inc. is looking for a motivated project coordinator to work with project managers and field personnel supporting projects for our excavation ...

Heavy Civil & Excavation Project Coordinator LaRiviere, Inc. is looking for a motivated project coordinator to work with project managers and field personnel supporting projects for our excavation ...

Lead completion of key store tasks and support special projects. * Assist with schedule adjustments and communicate changes to the Store Manager. * Partner with Store and Assistant Managers to coach ...

Lead completion of key store tasks and support special projects. * Assist with schedule adjustments and communicate changes to the Store Manager. * Partner with Store and Assistant Managers to coach ...

Cost Accountant 1

Payette, ID · On-site

$58K - $78K/yr

Conduct variance analysis (material, labor, and overhead) and report discrepancies. * Assist in preparing cost estimates for new products, capital projects, and process changes. * Assist Plant ...

Cost Accountant 1

Payette, ID

$58K - $78K/yr

Conduct variance analysis (material, labor, and overhead) and report discrepancies. Assist in preparing cost estimates for new products, capital projects, and process changes. Assist Plant Controller ...

Cost Accountant 1

Payette, ID

$58K - $78K/yr

Conduct variance analysis (material, labor, and overhead) and report discrepancies. * Assist in preparing cost estimates for new products, capital projects, and process changes. * Assist Plant ...

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Project Assistant information

See Ontario, OR salary details

$11

$19

$27

How much do project assistant jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for project assistant in Ontario, OR is $19.19, according to ZipRecruiter salary data. Most workers in this role earn between $15.43 and $21.63 per hour, depending on experience, location, and employer.

What is a project assistant?

A project assistant provides support to the project team and helps make sure projects get done on time and budget. They answer to the project manager or project administrator or a company director. Job duties include handling communication with everyone on the project team, creating and filing documentation, preparing reports, and serving as a liaison between management and the project team. Other responsibilities may include setting up office equipment—such as computers, printers, and webcams for online conference calls, scheduling meetings and check-ins, and managing the project calendar.

What are the key skills and qualifications needed to thrive as a project assistant, and why are they important?

To thrive as a Project Assistant, you need strong organizational skills, attention to detail, and a foundational understanding of project management principles, often supported by a relevant degree or coursework. Familiarity with project management software like Microsoft Project, Asana, or Trello, and proficiency in MS Office Suite are typically expected. Excellent communication, teamwork, and time management skills help you support project managers and coordinate among stakeholders effectively. These skills ensure projects run smoothly, deadlines are met, and teams stay aligned on objectives.

How does a project assistant typically collaborate with project managers and other team members?

Project Assistants play a crucial role in supporting project managers by organizing schedules, preparing documentation, and facilitating communication among team members. They often attend meetings to take notes, track action items, and ensure deadlines are met. Regular collaboration with various departments is common, as Project Assistants help coordinate resources, gather updates, and address any logistical challenges that arise. This role is ideal for individuals who enjoy multitasking and thrive in a dynamic, team-oriented environment.

What is the difference between Project Assistant vs Administrative Assistant?

AspectProject AssistantAdministrative Assistant
Required CredentialsHigh school diploma; some roles may prefer associate's degree or relevant certificationsHigh school diploma; often no specific certifications required
Work EnvironmentProject sites, offices, collaborative team settingsOffice settings, administrative departments
Employer & Industry UsageConstruction, IT, consulting, engineeringCorporate offices, government agencies, nonprofits
Common Search & ComparisonOften compared for support roles in projectsCompared for general office support roles

The Project Assistant and Administrative Assistant roles share similarities in supporting organizational functions, but Project Assistants focus more on supporting specific projects, often requiring knowledge of project management processes. Administrative Assistants handle broader administrative tasks across departments. Both roles are essential in various industries, but their focus and work environments differ slightly.

Can I get into project management with no experience?

Project assistants often start with little or no experience and can transition into project management roles by gaining relevant skills such as communication, organization, and familiarity with project management tools like MS Project or Trello. Entry-level positions may require some related experience or certifications like CAPM, and gaining practical experience through internships or volunteering can improve prospects.

Is a project assistant a good job?

A project assistant role involves supporting project managers with tasks such as scheduling, documentation, and communication. It can be a good entry-level position for those interested in project management, offering opportunities to develop organizational and communication skills in various industries. Job satisfaction depends on the work environment and career goals.

What are the most commonly searched types of Project jobs in Ontario, OR?

The most popular types of Project jobs in Ontario, OR are:

What job categories do people searching Project Assistant jobs in Ontario, OR look for?

The top searched job categories for Project Assistant jobs in Ontario, OR are:

What cities near Ontario, OR are hiring for Project Assistant jobs?

Cities near Ontario, OR with the most Project Assistant job openings:

Infographic showing various Project Assistant job openings in Ontario, OR as of August 2026, with employment types broken down into 77% Full Time, 19% Part Time, and 4% Contract. Highlights an 84% Physical, 5% Hybrid, and 11% Remote job distribution, with an average salary of $39,917 per year, or $19.2 per hour.

Assistant Project Manager

Lariviere Inc

Caldwell, ID • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 25 days ago


Job description

Heavy Civil & Excavation Assistant Project Manager

LaRiviere, Inc. is looking for a motivated assistant project manager to work with project managers and field personnel supporting projects for our excavation and concrete divisions in the Boise Idaho region. Experience with heavy civil work (roads, bridges, water & sewer installations) is preferred. This position has excellent growth opportunity.


Key responsibilities & Accountabilities:


Must have 2 years construction experience/knowledge.


Supporting the Project Manager in gathering equipment, resources, vendors, subcontractors for the implementation of won projects. Your main duties include, project administration, and administration for subcontractors and vendors. Liaison for government entities, vendors, suppliers, and owners on projects. Coordination with internal departments in the reconciliation of contracts and po's to maintain budgets, submitting engineering submittals, certified payrolls, SWPPP reporting and field support as required.


Duties Include but not limited to:

Building and distribution of subcontracts, service agreements and PO's

Creating and maintenance of project PO's

Accounts payable reconciliation for projects

Document gathering and distribution to the field ie: Field binders, plans, specs, permits, schedules, job posting documents

Setting up project processes and maintaining document distribution throughout the project as determined by individual owners and project specs.

Attend project meetings

Monthly reconciliation for vendors and subcontractors including sub accruals and pay applications periodically

Validating and Maintaining file documents, including payrolls, submittals, owner websites, invoices, pay apps, SWPPP documents, lien waivers, COI, EEO, PPP, Davis Bacon, prevailing wage, DBE, apprentice requirements, permits, etc.

SWPPP - building of SWPPP, Erosion Control Plans, maintenance of SWPPP reporting on weekly basis including, filing of documents, maintaining reports, and storm events as needed each job approximately 1 day per week to complete depending on job and location

Support PM's with any daily requirements,

Project close out including, Lien waiver filings, certified payroll close out, retention payouts, WH-5 etc


Possible extras include

Position documentation

Training

Process set up and changes

Set up of process with various vendors for project specific requirements and owners

Varied special projects as requested by Management ie documentation, bid support.


Job Skills and Qualifications

Good communication and interpersonal skills

Strong organizational skills and multi-tasking skills

Attention to detail

Time management skills and ability to meet deadlines

Excellent analytical and problem-solving skills

Excellent computer and written communication skills

Ability to communicate with various vendors, Owners, & Stakeholders in professional manner

Team Player

Drive to learn, grow and work to succeed

Outgoing attitude with an ability to build relationships quickly to transition to smooth project completion


Work Environment:

  • Reads blueprints and specs.
  • Writes technical and professional reports and correspondence using proper spelling, grammar and style.
  • Communicates information and responds to questions individually and in small groups
  • Applies common sense understanding to carry out simple written and oral instructions
  • May involve lifting and carrying up to 25 lbs. for short periods of time
  • Must have visual acuity to see and read paper and electronic documents.
  • Ability to climb stairs
  • Sits for long periods of time, walking job sites, stand, bend, stoop, reach, climb carry and lift for carrying periods.
  • Requires continuous and repetitive arm-hand-eye movement


Benefits:


Company paid health insurance for employee and immediate family.
401(k) plan
Dental & Vision Insurance
Generous Paid Time Off

Paid Holidays


LaRiviere, Inc. is an Equal Opportunity Employer is an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, genetic information, sexual orientation, gender, gender identity or expression, veteran status, or any other status protected under federal, state, or local law. All LaRiviere, Inc. subcontractors and vendors agree they will abide by the equal opportunity provisions of 41CFR 60-1.4.