Accounting / Payroll / HR Specialist

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)

Human Resources & Onboarding (Approx. 20 hrs / week)

Qualifications

Required

Preferred

Key Competencies

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.