Senior Accountant

Community Care Cooperative•Boston, MA

18d•$91,042 - $109,250•Hybrid

About The Position

The Senior Accountant is responsible for overseeing the accuracy and completeness of accounting processes, including journal entries, accounts payable, invoicing, and payer-file reconciliations. This role provides quality control across monthly close activities, ensures compliance with organizational policies, and partners with internal stakeholders to confirm instructions are acted on promptly. The Senior Accountant will serve as a process lead, identifying gaps, updating procedures, and mentoring accounting staff to ensure consistent, detail-oriented execution.

Requirements

Detail Orientation: Ability to identify and correct errors; high level of accuracy in all work
Listening & Communication: Demonstrated ability to capture instructions, confirm understanding, and follow through
Analytical Skills: Strong problem-solving and variance analysis capabilities
Process Discipline: Experience creating, implementing, and enforcing structured workflows and checklists
Technology Proficiency: Comfortable with accounting software, Excel (lookups, pivots), and data files from external sources
Time Management: Ability to prioritize multiple responsibilities and meet deadlines in a fast-paced environment
Collaboration: Strong interpersonal skills to work with SMEs, finance leadership, and accounting staff.
Professional Accountability: Ownership for both the quality of their own work and the oversight of staff- prepared work
Bachelor’s degree (BA or BS), focus in Accounting, Finance, or related field preferred
3–5 years of progressive accounting experience, ideally in a nonprofit, healthcare, or payer-provider setting
Strong knowledge of GAAP and nonprofit accounting standards
Experience with monthly close, reconciliations, journal entries, and invoicing
Prior experience reviewing and improving accounting processes

Nice To Haves

Advanced Excel & fiscal data analysis: comfort with pivot tables, lookups and error checks to quickly analyze payer files and/or reconcile large datasets
Automation mindset: ability to streamline repetitive tasks (using excel or another tool) to reduce manual errors
Documentation discipline: ability to create SOPs/checklist and keep them current
Nonprofit/healthcare familiarity
Experience with anti-racism activities, and/or lived experience with racism is highly preferred
ADP Payroll software experience preferred but not required

Responsibilities

Process full-cycle payroll for a multi-state workforce (350 employees across 40+ states, mix of hourly and salary), ensuring accuracy, timeliness, and compliance
Administer payroll primarily within the ADP system, including ongoing collaboration with ADP’s internal project and support team
Maintain and audit payroll records, ensuring compliance with federal, state, and local regulations
Handle payroll-related tax filings, deductions, garnishments, and benefit integrations
Partner closely with HR to support onboarding, employee data changes, and offboarding processes
Assist in the implementation and optimization of ADP payroll system
Prepare payroll reports and support Finance with reconciliations, audits, and month-end close activities
Respond to employee payroll inquiries and resolve discrepancies in a timely manner
Ensure compliance with nonprofit-specific benefits, including 403(b) retirement plan contributions and reporting
Prepare, review and approve journal entries and supporting documentation
Ensure monthly close activities are completed accurately and on schedule
Perform variance analysis and identify unusual trends or discrepancies
Ensure reconciliations are complete, accurate and reviewed
Review AP processing to ensure invoices are coded, approved, and entered timely
Review and approve staff-prepared invoices to ensure subject matter expert instructions, rate changes, and contract terms are accurately applied
Leverage technology to manage AP and AR; ensure changes (e.g., escalators, adjustments) are documented and reflected promptly
Prevent downstream corrections by identifying issues before invoices are sent out
Review payer data (e.g., Medicaid, Blue Cross) for completeness, accuracy, and alignment with expected norms before loading into financial models
Identify discrepancies, investigate issues, and escalate as appropriate
Implement and enforce QC checklists for AP, invoicing, payer files, and journal entries
Conduct periodic reviews of staff work to ensure policies and procedures are followed
Recommend and implement process improvements for greater efficiency and accuracy
Mentor and support staff accountants in developing technical accuracy and attention to detail
Act as a liaison with SMEs, ensuring instructions are documented, confirmed, and executed in a timely manner
Support audit preparation and respond to auditor requests
Provide coverage for finance leadership as needed