Top 151 Part time office assistant / customer service representative Jobs in Mastic Beach, Ny

Administrative Assistant
Concept Components —Bohemia, NY
- $21 - $26 an hour
- Part-time
- Background check
- Microsoft Excel
- Mid-level
- Paid holidays
- Paid time off
Quick Apply
Customer Service Representative
MODERN ITALIAN BAKERY —Oakdale, NY
- $20 an hour
- Part-time
- Office
- High school diploma or GED
- In-person
- 401(k)
- Life insurance
Quick Apply
Dental Front Desk Receptionist
Stony Brook Dental Group —Stony Brook, NY
- Part-time
- Dental office
- HIPAA
- In-person
- 401(k)
Quick Apply
Remote and Onsite Office Assistant
DM Design —Bellport, NY
- $24.46 - $29.46 an hour
- Part-time
- Hybrid work
- Computer literacy
- Mid-level
- Office
- Flexible schedule
Quick Apply
Department Secretary- Part Time, Days
NYU Langone Health —Patchogue, NY
- $20.65 - $25.04 an hour
- Part-time
- Microsoft Excel
- Ability to walk for extended periods
- Office
Receptionist
Salon Excel —East Yaphank, NY
- From $17 an hour
- Part-time
- Bilingual
- Google Workspace
- Microsoft Outlook
Quick Apply
Office Assistant P/T
Seafield Center, Inc —Patchogue, NY
- $20 - $22 an hour
- Part-time
- Office
- Typing
- Outpatient
Quick Apply
Front Desk Receptionist
Medford Multicare Center —Medford, NY
- $16 - $18 an hour
- Part-time
- Microsoft Outlook
- Office
- Administrative experience
Quick Apply
Dental Office Receptionist
Sayville Family Dentistry —Sayville, NY
- $24 - $27 an hour
- Part-time
- Dental office
- Basic math
- Organizational skills
- Paid holidays
- 401(k)
Quick Apply
3d
Front Desk Receptionist - Part Time
SightMD —Port Jefferson Station, NY
- $22 an hour
- Part-time
- Computer literacy
- HIPAA
- High school diploma or GED
- Paid holidays
- Paid time off
Quick Apply
11d
Medical Office Administrator
Island Psychiatry —Port Jefferson Station, NY
- $22 - $24 an hour
- Part-time
- Spanish
- Psychiatry
- No experience needed
Quick Apply
Member Services Representative I
YMCA of Long Island —Patchogue, NY
- $17 - $18 an hour
- Part-time
- No degree
- Entry level
Receptionist
Mas Imaging Portable X-ray —Ronkonkoma, NY
- From $20 an hour
- Part-time
- Hybrid work
- Google Workspace
- Administrative experience
- High school diploma or GED
Quick Apply
5d
Office Assistant
Seafield Center, Inc —Riverhead, NY
- $20 - $22 an hour
- Part-time
- Office
- Typing
- Outpatient
Quick Apply
Part-Time Office Assistant / Customer Service Representative
Spectra Paper —Bohemia, NY
- $18 - $20 an hour
- Part-time
- Bilingual
- Office
- Administrative experience
Quick Apply
12d
Customer Service Representative
Mid Island Air Service —Shirley, NY
- From $17.50 an hour
- Part-time
- Background check
- Customer service
- Computer literacy
- On-the-job training
Quick Apply
8d
Clerical Aide 12-month # 72
Patchogue-Medford School District —Patchogue, NY
- $20.93 an hour
- Part-time
- Bilingual
- Office
- Elementary school
5d
Front Desk Receptionist
Block Sports Chiropractic and Physical Therapy —Selden, NY
- $18 - $25 an hour
- Part-time
- Spanish
- Front desk
- In-person
- 401(k)
- Paid time off
Quick Apply
4d
FRONT DESK ADMINISTRATIVE ASSISTANT
Family Service League Inc. —Bay Shore, NY
- $21 - $22 an hour
- Part-time
- Spanish
- Administrative experience
- High school diploma or GED
Quick Apply
Pharmacy Customer Service Associate
Walgreens —Shirley, NY
- $18 - $20 an hour
- Part-time
- Computer literacy
- Basic math
- Maintenance
- Continuing education credits
- Health insurance

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Administrative Assistant

Concept Components
Bohemia, NY

Quick Apply

Job Details

Part-time
$21 - $26 an hour

Benefits

Paid holidays
Paid time off
Flexible schedule

Qualifications

Confidential information handling
Microsoft Excel
Filing
Administrative experience
High school diploma or GED
Clerical experience
Productivity software
Technical Proficiency
Quality data entry

Full Job Description

Position Summary:

Concept Components, a growing AS9100-certified precision manufacturing and aerospace/defense job shop, is seeking a reliable, detail-oriented Full Charge Administrative Assistant. This role will provide critical day-to-day support to the Accounting and Purchasing departments while handling a wide range of clerical, administrative, and data entry tasks across the organization. The ideal candidate is organized, proactive, and comfortable working in a fast-paced manufacturing environment where accuracy and confidentiality are essential.

Key Responsibilities:

Accounts Payable (AP) Support

· Process vendor invoices, including data entry, three-way matching with purchase orders and receiving documents, and timely payments.

· Reconcile vendor statements and resolve discrepancies.

· Maintain accurate AP records and filing systems (digital and physical).

Accounts Receivable (AR) Support

· Prepare and send customer invoices (billing).

· Perform AR data entry and invoice matching.

· Assist with customer collections, including follow-up on outstanding balances.

· Maintain accurate AR records and filing systems (digital and physical).

Additional Accounting Support

· Assist with month-end close activities.

· Handle general financial data entry and filing.

Purchasing Support

· Assist with purchase order creation, tracking, and follow-up.

· Maintain vendor files, pricing databases, and supplier records.

· Coordinate with suppliers on deliveries, returns, and documentation.

· Handle general data entry and filing.

Clerical & Administrative Duties

· Scanning, copying, and filing.

· Provide backup administrative support to other team members as needed.

Data Entry

· Perform high-volume data entry with exceptional speed and accuracy into ERP systems, QuickBooks Online (QBO), and other company databases, maintaining the highest level of data integrity for critical financial, inventory, customer, and production records.

· Ensure precision and attention to detail on all entries to prevent costly errors, support compliance requirements, and enable reliable financial reporting while consistently meeting daily and month-end deadlines.

Qualifications & Requirements:

Education

· High School Diploma or equivalent required. College degree not required.

Experience

· 2+ years of administrative or clerical experience, ideally in a manufacturing, accounting, or purchasing environment. Experience with QuickBooks Online and aerospace/defense industry is a strong plus.

Technical Skills

· Computer savvy with strong proficiency in Microsoft Office Suite (especially Excel) and fast typing skills.

· Strong data entry skills with high accuracy and attention to detail.

· Familiarity with ERP systems and QBO preferred.

Soft Skills

· Excellent organizational and multitasking abilities

· Strong written and verbal communication skills

· Professional demeanor with the ability to maintain confidentiality

· High resilience with the ability to remain calm, positive, and effective under pressure while thriving in a fast-paced, high-pressure manufacturing environment.

Work Schedule:

Approximately 30 hours per week, Monday – Friday, with flexible start times between 7:30 AM and 9:00 AM. Exact daily schedule to be determined based on mutual agreement and business needs.

Other:

Must be a U.S. Citizen or Permanent Resident (Green Card holder).

What We Offer:

Competitive hourly rate of $21 – $26 per hour based on experience.

Workers’ Compensation Insurance.

7 Paid Holidays.

10 Paid Vacation Days (to be used during the two annual company shutdowns).

5 PTO Days.

Stable, family-oriented company culture with opportunities for growth in a growing aerospace/defense manufacturer.

To Apply:

Please submit your resume to [email protected]

Pay: $21.00 - $26.00 per hour

Benefits:

Flexible schedule
Paid time off

Work Location: In person

Quick Apply

Refine Your Search

part time office assistant / customer service representative jobs in mastic beach, ny

Administrative Assistant

Customer Service Representative

Dental Front Desk Receptionist

Remote and Onsite Office Assistant

Department Secretary- Part Time, Days

Receptionist

Office Assistant P/T

Front Desk Receptionist

Dental Office Receptionist

Front Desk Receptionist - Part Time

Medical Office Administrator

Member Services Representative I

Receptionist

Office Assistant

Part-Time Office Assistant / Customer Service Representative

Customer Service Representative

Clerical Aide 12-month # 72

Front Desk Receptionist

FRONT DESK ADMINISTRATIVE ASSISTANT

Pharmacy Customer Service Associate

I want to receive the latest job alert for part time office assistant / customer service representative in mastic beach, ny

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