Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Administrative Assistant

$20 - $29.47 per hour

Crown Consulting Inc

Administrative Assistant

Crown Innovations, Inc. is a dynamic and growing organization providing professional services and operational support solutions to government and commercial customers nationwide. We are committed to delivering exceptional service through innovation, collaboration, and operational excellence.

We are currently seeking a highly organized and detail-oriented Administrative Assistant to support operations at our Ontario, California office. The ideal candidate will possess strong communication skills, administrative expertise, and the ability to effectively manage multiple priorities in a fast-paced environment.

Job Description

Administrative Assistant

100% Onsite | United States | Full-Time

Position Overview

Crown seeks an Administrative Assistant to become part of a team at our Ontario, California office . The successful candidate will perform a variety of administrative duties including answering phones, arranging travel and processing travel expense vouchers, transmitting and receiving messages via email, maintaining electronic calendars, coordinating meetings, escorting visitors, maintaining supplies, and typing memoranda.

Key Responsibilities

  • Processes company travel vouchers
  • Ensures all receipts are legible and valid expenses
  • Ensures that all charges submitted are in compliance with the contract requirements
  • Ensures that the client is billed in a timely manner
  • Assists with invoices that are sent to the client monthly
  • Acts as the liaison between the travel crews and the complexities of the voucher system
  • Enforces policy on travel/per-diem, and provides a constant monitoring/auditing of the process for every submission
  • Coordinates with the many various companies for materials/lodging/travel and attains the appropriate receipts/invoices in the proper format
  • Compiles numerous ad-hoc projects including various statistical reports such as weekly site reports

Qualifications

  • Associate's Degree or equivalent combination of education and experience
  • Minimum of 2+ years of administrative support experience
  • Proficiency in Microsoft Office Suite, including advanced Excel skills
  • Strong organizational and multitasking abilities
  • Excellent written and verbal communication skills
  • Ability to work independently and collaboratively in a team environment
  • Strong attention to detail and problem-solving skills
  • Ability to prioritize tasks and manage competing deadlines

Preferred Qualifications:

  • Experience supporting government contracts or federal programs
  • Familiarity with travel expense processing and invoice management
  • Experience with reporting and data tracking tools
  • Knowledge of federal compliance requirements is highly desirable

Schedule & Travel

Typical schedule is Monday through Thursday, 6:00 AM to 4:30 PM. Must be able to work non-standard hours depending on site requirements. This is a 100% Onsite position.

Compensation

Hourly Rate Range: $20.00 to $29.47 per hour (W2)

Compensation is determined based on experience, qualifications, geographic location, and internal equity considerations.

Crown complies with all applicable state and local pay transparency laws. The listed compensation range represents the good faith salary range for this position at the time of posting. Actual compensation will be based on experience, qualifications, geographic considerations, and business needs.

Benefits

401K with company match Comprehensive medical, dental, and vision plans Generous PTO

Crown Innovations is a recognized leader in research, development, and engineering, with deep expertise in air traffic management, survey administration, lifecycle data management for informed decision-making, infrastructure sustainment and modernization, emerging technologies, and National Airspace System (NAS) integration.

For over 30 years, we have supported a diverse portfolio of clientsincluding the FAA, NASA, the Energy Information Administration (EIA), state and local governments, and commercial organizations such as the Ohio and North Carolina Departments of Transportation.

As a prime contractor on several high-impact federal programs, Crown offers comprehensive capabilities in engineering, strategic planning, data analytics, software development, modeling and simulation, and regulatory compliance.

We are at the forefront of enabling the safe and efficient integration of uncrewed aircraft systems (UAS) and advanced air mobility (AAM) into the NAS, while also supporting infrastructure modernization efforts through robust lifecycle data management solutions. Whether advancing innovative air traffic concepts, enhancing operational performance, or enabling the future of urban air mobility, Crown is committed to shaping a safer, smarter, and more efficient infrastructure landscape.

Crown has consistently been voted one of the best places to work in the Washington, DC area.

Crown Consulting, Inc.
Vacancy posted 20 hours ago
Similar jobs that could be interesting for youBased on the Administrative Assistant in Ontario, CA vacancy
  •  ...Job Description Job Description The Administrative Assistant/Front Desk Receptionist is a key member of a large corporate environment, responsible for managing front desk operations and providing exceptional administrative support. This role involves daily interactions... 
    Suggested
    Work at office

    Evolve, LLC

    Ontario, CA
    3 days ago
  • $17 per hour

     ...Job Description Job Description Description This position is an administrative role that supports the operations staff. Assistant will be able to create and manage spreadsheets, input and utilize various databases, run reports and create professional documents and... 
    Suggested
    Contract work
    Temporary work

    TEKsystems Careers

    Ontario, CA
    8 days ago
  •  ...Competitive Compensation Paid Time Off Career Growth Opportunities Job Summary We are seeking a motivated and outgoing Administrative Assistant to join our team. In this role, you will provide support to our office employees, ensuring they have all the information... 
    Suggested
    Full time
    Work at office

    Inland Pacific Roofing Co Inc

    Upland, CA
    24 days ago
  •  ...Administrative Assistant This role supports the core operations of a growing sports-focused business. The ideal candidate is someone who naturally keeps things organized, thinks several steps ahead, and notices small details before they become larger issues. This is... 
    Suggested
    Local area
    Remote work
    Work from home

    Johnny Allen Tennis

    Chino, CA
    2 days ago
  • $22 - $30.57 per hour

     ...Overview JOB SUMMARY This position encompasses the administrative and secretarial support for the Respiratory Care and Neurodiagnostic departments. MINIMUM QUALIFICATIONS Education: High School Diploma or GED. Experience: Experience working in a Healthcare... 
    Suggested
    Daily paid
    Work at office

    San Antonio Regional Hospital

    Upland, CA
    2 days ago
  • $19.44 - $26.27 per hour

     ...Job Posting Title Administrative Assistant Choose To Make A Difference At American Career College we share a passion for students and transforming healthcare education! As an associate for a certified Great Place to Work, you will join a collaborative, student... 
    Permanent employment
    Work at office

    American Career College

    Ontario, CA
    5 days ago
  • $20.04 - $29.05 per hour

     ...Job Description Job Description A very well known Company near Glendora is seeking an Administrative Assistant. Be part of a Great Company, and Apply Now! Position Tittle: Administrative Assistant Working Hours: 8 AM to 5 PM (OT as needed) Working Days: Monday - Friday... 
    Monday to Friday

    Kimco Staffing Careers

    Ontario, CA
    3 days ago
  • $22.68 - $25.51 per hour

     ...matters-helping students discover their God-given potential and purpose. Ontario Christian School is seeking a qualified Administrative Assistant to support the daily operations of the school. This role supports the Business Office in the areas of Accounting, Human... 
    Hourly pay
    Daily paid
    Full time
    For contractors
    Work at office

    ONTARIO CHRISTIAN SCHOOL

    Ontario, CA
    3 days ago
  •  ...kitchen beyond traditional form and function. Position Summary: We are seeking a dependable, detail-oriented Accounting & Administrative Assistant to support both our finance and office operations. This role combines routine accounting tasks, primarily in accounts... 
    Full time
    Work at office

    Cosmo Appliances

    Chino, CA
    4 days ago
  •  ...Job Description Job Description **Must have 1 year dental assistant experience** MUST be able to speak Spanish - many of our patients are Spanish speakers and it's important to us to find someone who is able to communicate with them. Responsibilities: - Call... 
    Full time
    Work at office
    Flexible hours

    Sally Esquivel

    Upland, CA
    24 days ago
  •  ...Job Description Job Description Administrative Office Assistant (Bilingual English/Mandarin) Full-Time | On-site | Ontario, CA Company: SED PHARMA, INC. Position Overview We are seeking a highly organized and proactive Office Assistant to support daily... 
    Full time
    Work at office

    SED PHARMA INC

    Ontario, CA
    16 hours ago
  • $22.28 - $32.19 per hour

     ...vision and 10% employer paid 401A through VOYA Financial. Job Responsibilities Performs duties consistent with the Administrative Assistant II independently. Serves as primary liaison with cross-departmental senior management for communication regarding projects... 
    Hourly pay
    Work at office

    Holiday Inn Express & Suites Ontario Airport

    Ontario, CA
    20 hours ago
  • $23 - $29 per hour

     ...Ontario, CA; Lehi, UT; Orem, UT Work Arrangement: In-office or Hybrid A Typical Day in the Life A typical day as an Administrative Assistant might include the following: Provides administrative support to partners and managers with integrity and... 
    Work at office
    Local area
    Visa sponsorship

    Eide Bailly

    Ontario, CA
    4 days ago
  • School Secretary I - CL 25-26-337-I at Chino Valley Unified School District Share on X - Application Deadline 5/15/2026 4:30 PM Pacific Date Posted 5/4/2026 Contact Nereyda Raygoza (***) ***-**** 1129 Number of Openings 1 Salary Pay Range $26.65 - $3 Secretary, School,...

    Chino Valley Unified School District

    Chino, CA
    2 days ago
  •  ...and Wardrobe Door Manufacturing and Installation Company located in Ontario, California have an immediate opening for a Scheduling Assistant for the Installation Department. Job duties/responsibilities: The selected candidate, once trained will assist the... 
    For subcontractor
    Work at office
    Immediate start

    Larry Methvin Installation Inc.

    Ontario, CA
    6 days ago
  • $150 per hour

     ...company goals and metrics. Follow all reporting and documentation as required by established policies, practices and procedures. Assist with other Supply Chain related duties as required. QUALIFICATIONS AND EDUCATION REQUIREMENTS ~3-5+ years planning... 
    Local area
    Worldwide

    Viant, Inc.

    Upland, CA
    1 day ago
  • $20 - $22 per hour

    Home Care Scheduler We are looking for an Home Care Scheduler to help manage our successful Home Health business! This role makes a significant impact on our daily operations and the ability to provide the best care to patients by coordinating medical and health services...
    Hourly pay
    Immediate start
    Shift work

    HomeWell Care Services

    Upland, CA
    2 days ago
  •  ...Functions as a team member to organize and prioritize responsibilities to complete daily work assignments. Works as part of a team to assist radiologists, technologists, co-workers, patients, and referring physician offices as needed. Education and Experience High... 
    Full time
    Shift work

    Rezolut

    Ontario, CA
    2 days ago
  • $70k

    Position Branch Manager Description Responsibilities include expanding existing business, handling operations, managing the location, recruitment, client relations, safety and managing a staff. Will also be responsible for monitoring and managing productivity...
    Full time
    Temporary work
    Part time
    Work at office
    Shift work

    ES Management Group Inc.

    Ontario, CA
    1 day ago
  • $21 - $26 per hour

     ...Dealership Business Office Assistant Ontario, CA Your next opportunity awaits at the Fletcher Jones Family of Dealerships. We are currently hiring a Business Office Assistant to join our centralized Regional Business Office team located in Ontario, California!... 
    Currently hiring
    Work at office
    Flexible hours

    Fletcher Jones Management West

    Ontario, CA
    2 days ago
  • $20 - $25 per hour

     ...Business Office Assistant Las Colinas Post Acute – Ontario, CA Pay Range: $20 – $25 per hour (DOE) Why Join Las Colinas Post...  ...The Business Office Assistant supports the day-to-day administrative and financial operations of the facility. This role works closely... 
    Hourly pay
    Full time
    Work at office

    PACS Inc

    Ontario, CA
    2 days ago
  • $30 - $35 per hour

     ...enter accounts payable data. Analyze discrepancies and unpaid invoices. Collect, confirm, and process timesheets. Provide administrative support for the Accounting Supervisor. Find and use accounting data to resolve accounting problems and discrepancies.... 
    Hourly pay
    Weekly pay
    For contractors

    JLM Strategic Talent Partners

    Ontario, CA
    1 day ago
  • $25 per hour

     ...Overview Planned Parenthood of Orange and San Bernardino Counties has a temporary full-time opportunity for an Administrative Medical Assistant in Upland, CA. Schedule: 4/10 work week which includes one weekend day. Administrative position responsible for... 
    Full time
    Temporary work
    Flexible hours

    Planned Parenthood of Orange and San Bernardino Counties

    Upland, CA
    4 days ago
  •  ...Larry Methvin Installation, Inc. Job Description JOB TITLE: Purchasing Assistant DEPARTMENT: Purchasing REPORTS TO: Purchasing Manager Location: Ontario/CA FLSA Status: Non-Exempt To perform this job successfully, an individual... 
    Part time

    Larry Methvin Installation Inc.

    Ontario, CA
    1 day ago
  • $16.9 per hour

    Platt College Los Angeles Llc is seeking a Federal Work Study (FWS) Student to provide administrative assistance to student accounts and financial aid departments. Responsibilities include creating correspondence, preparing financial aid packets, and assisting with student... 

    Platt College Los Angeles Llc

    Ontario, CA
    3 days ago
  • $19 - $20 per hour

    Facility Administrator FirstService Residential Base pay range $19.00/hr - $20.00/hr Job Overview The Facility Administrator will be an...  ...and vendors, or refer to the appropriate staff member for assistance. Act as the front desk liaison to ensure all residents/guest... 
    Full time
    Part time
    Work at office
    Flexible hours
    Day shift
    Afternoon shift

    FirstService Residential

    Chino, CA
    3 days ago
  • $20 - $25 per hour

     ...Assistant Office Manager Opportunity - Our Best Life Companies Grow Your Career with a Team That Feels Like Family Our Best...  ...operations Support the Office Manager with day-to-day administrative and operational tasks Provide general administrative support... 
    Hourly pay
    Work at office

    Our Best Life Companies

    Chino, CA
    20 hours ago
  •  ...mission blvd, Ontario Ca 91762     We are seeking an Office Administrator to join our team! You will perform clerical and administrative...  ...documents Plan and schedule appointments Greet and assist onsite guests Answer inbound telephone calls Develop and... 
    Work at office

    STELLAR TRAILERS CORP

    Ontario, CA
    3 days ago
  • GROW YOUR OFFICE CAREER! NOW HIRING: Customer Service / Admin Support ACS Staffing, Inc. is currently hiring for part-time bilingual (English/Spanish) Customer Service / Admin Support opportunity in a professional office environment. CALL SUSANA: (***) ***-**** Resume:...
    Part time
    Currently hiring
    Work at office
    Immediate start

    ACS Staffing Inc

    Ontario, CA
    20 hours ago
  • $26.95 per hour

     ...Secretary / Administrative Assistant Ghostrock, a subsidiary of Three Saints Bay, LLC, and a Federal Government Contractor industry leader, is seeking a Secretary / Administrative Assistant in Norco, CA. Position Responsibilities: Perform office-related duties... 
    For contractors
    Work at office
    Local area
    Relocation
    Monday to Friday

    Three Saints Bay

    Norco, CA
    4 days ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Administrative Assistant. Be the first to apply!