Accounting/Payroll/HR Specialist

2 weeks ago

Marlborough, MA, United States Sigma Inc. Full time
Position Title: Accounting, Payroll & HR Specialist
Location: Marlborough, MA (Onsite Only)
Employment Type: Full-Time, Direct Hire

About the Role

Sigma Inc. is seeking an organized, detail-oriented Accounting, Payroll & HR Specialist to support our internal finance and HR operations. This role combines hands-on accounting work, payroll administration, and human resources coordination, making it an ideal fit for someone with strong financial skills who also enjoys supporting employee processes.

This is an onsite position working closely with ownership, leadership, and operational teams to ensure accuracy, compliance, and efficiency across accounting, payroll, and HR administration.

Key Responsibilities

Accounting (Approx. 15 hrs/week)
  • Process day-to-day accounting transactions and maintain accurate general ledger activity.
  • Process incoming payments and match invoices in QuickBooks.
  • Manage cash applications and monitor bank balances.
  • Prepare and reconcile monthly statements, ensuring clear documentation of variances and balance fluctuations.
  • Produce monthly financial reporting that includes analysis and commentary comparing actual vs. budget/forecast.
  • Create, manage, and maintain Excel spreadsheets combining financial and operational data.
  • Assist owners with miscellaneous accounting tasks and financial documentation.
Payroll (Approx. 5-6 hrs/week)
  • Process biweekly payroll through ADP accurately and on schedule.
  • Maintain payroll records, including taxes, deductions, PTO tracking, and employee status changes.
  • Coordinate payroll adjustments, garnishments, reimbursements, and corrections when applicable.
  • Ensure compliance with state and federal payroll regulations.
Human Resources & Onboarding (Approx. 20 hrs/week)
  • Oversee new hire onboarding including document collection, HRIS entry, and new employee orientation.
  • Administer background checks, employment eligibility verification (I-9/E-Verify), and credential tracking as applicable.
  • Maintain personnel files, confidentiality protocols, and HR compliance records.
  • Support policy updates, employee communication, and HR program development.
  • Assist with benefits administration including enrollment, annual renewals, and employee updates.
  • Provide HR reporting, metrics, and tracking as needed.
Qualifications

Required
  • Bachelor's Degree in Accounting (minimum requirement).
  • 3+ years experience in accounting or finance function.
  • Hands-on experience with QuickBooks.
  • Intermediate Excel capability (VLOOKUP, pivot tables preferred).
  • Ability to analyze financial data and investigate variances with accuracy and clarity.
  • Strong attention to detail, confidentiality, and accuracy.
Preferred
  • Experience with ADP payroll systems.
  • HR, payroll, or employee onboarding experience.
  • Experience working in a fast-paced small to mid-sized business environment.
Key Competencies
  • Accuracy & attention to detail
  • Confidentiality and professionalism
  • Strong analytical and problem-solving skills
  • Ability to multitask and prioritize
  • Clear communication, both written and verbal
  • Ownership mindset and proactive approach

Why Join Us?

This role provides a unique opportunity to work closely with ownership and leadership, contribute to process improvement, and grow your operational impact in a dynamic organization. If you're looking for a role where your work truly matters and variety keeps your day engaging-this position is for you.

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