The Twin Rivers Branch is offering only curbside pickup until further notice. Curbside hours are M-Th from 9:30 am - 8:15 pm, F-Sat from 9:30 am - 4:45 pm. Outdoor programming will continue as scheduled. Thank you for your patience during this time. Click here to schedule a curbside appointment.

Employment Opportunities

Interested in working for us? We accept resumes on an ongoing basis for professional librarians and individuals who are interested in clerical or page positions.

Résumés may be submitted care of:

Ellen Brown, Library Director
Mercer County Library System
Lawrence HQ Branch
2751 Brunswick Pike
Lawrenceville, NJ 08648
email: director@mcl.org
fax: (609) 538-1206

Note: Mercer County residency is required within one year of appointment. All applicants are subject to pre-employment tests: drug, physical and criminal background check.

Résumés will be accepted until the vacancy is filled.

EOE/AA/ADA Employer

Current Openings

COVID-19 Update

Although the scheduled hours of these vacancies will mirror our present circumstances, the library system will move toward increasing its hours and days of operation back to a pre-COVID schedule, as COVID 19 and the Governor’s EOs permit.

Any candidate wishing to pursue a vacancy with the library system will be required to at some point work evenings, weekends, and holidays. Candidates must be flexible and adaptable to what could be a changing environment. Part time staff in particular must be aware that most part time positions require working every Saturday and/or Sunday, or at least every other. Some require, under normal circumstances, more than one evening per week.

Please also remember our programming needs have changed – in addition to in-house programming, which will resume as soon as is safe to do so, we engage our public by creating virtual programming and participating in the library’s blog and other social media outlets. Outreach is also an important component to any library position, and will be again, as soon as permitted.

  • Part-time Library Assistant, West Windsor

    This is a 19 hours per week position that includes day, evening, and weekend hours. The employee will accrue vacation and sick leave time and be eligible for holiday pay, but will not provide health benefits. A successful candidate will provide outstanding patron service to a diverse public. They must

    View the description.

  • Administrative Assistant, Library Administration Office

    The Mercer County Library System is seeking applications for the role of administrative assistant in the Library’s Administrative Office, located at 2751 Brunswick Pike, Lawrenceville, NJ 08648. Only those applicants selected for interview will be contacted and the position will be filled as soon as a suitable candidate is chosen.

    View the description.

  • PT Librarian 1, Lawrence Branch

    Anticipated Vacancy: Part Time Librarian I Reference at Lawrence HQ Branch, Mercer County Library System This 19 hours per week position requires weekend and evenings. Please note, the Lawrence HQ Branch is open Sundays throughout the school years, and four of the County-observed holidays and applicants must be available to

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  • Building Maintenance Worker

    This is a full time position, 37.5 hours per week, that supports the custodial needs and outside maintenance of eight branches within the Library System. Under direction of a supervisory official, the candidate will perform varied simple and moderately physically strenuous tasks involved in  cleaning and  maintaining public library buildings,

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  • Part Time Library Assistant, Ewing Branch

    This is a 19 hours per week position that includes day, evening, and weekend hours. The employee will accrue vacation and sick leave time and be eligible for holiday pay, but will not provide health benefits. A successful candidate will provide outstanding patron service to a diverse public. They must

    View the description.