Senior Accountant

Job Title: Senior Accountant

100% Remote

Job Description

This Senior Accountant role supports a mission-driven, remote-first nonprofit organization by leading core accounting operations across three entities, including a 501(c)(3), 501(c)(4), and a single-member LLC. The position focuses on monthly close, payroll support, vendor and expense processing, and compliance with US GAAP and nonprofit-specific accounting rules. This is a temporary assignment of approximately 24 weeks, during which you will help maintain a 10-day close period, support annual audits and Form 990 preparation, and ensure accurate time tracking and billing for each entity.

Responsibilities

• Perform monthly accounting close activities, including preparing journal entries and compiling monthly and annual account reconciliations, to maintain a 10-day close period across three entities.
• Assist in processing semi-monthly payroll and 401(k) contributions, ensuring accuracy and timeliness.
• Review and process third-party vendor invoices and employee reimbursements, verifying proper approvals and documentation.
• Ensure employee credit card charges are accurately coded to the appropriate accounts and entities.
• Help maintain compliance with US GAAP and applicable 501(c)(3) and 501(c)(4) accounting rules.
• Contribute to the preparation of schedules and supporting documentation for annual financial audits.
• Support the preparation of information and schedules required for Form 990 production.
• Track time and billing separately for each entity, including the 501(c)(3), 501(c)(4), and single-member LLC.
• Collaborate with the finance team to address accounting issues, streamline processes, and support continuous improvement in financial operations.
• Work independently in a remote environment while managing multiple priorities and meeting deadlines.

Essential Skills

• Bachelor's degree in accounting or a related field.
• Typically 3–7 years of professional experience in accounting.
• Experience with nonprofit accounting, particularly for 501(c)(3) and 501(c)(4) organizations.
• Prior experience working with Sage Intacct.
• Prior experience working with Ramp.
• Prior experience working with Paychex.
• Proficiency with Microsoft Office, including Excel.
• Proficiency with Google Suite tools.
• Strong understanding of US GAAP.
• Ability to perform month-end close, including journal entries and account reconciliations.
• Experience with payroll processing and 401(k) contribution handling.
• Experience reviewing and processing invoices, reimbursements, and credit card transactions.
• Ability to prepare schedules and documentation for financial audits and Form 990.
• Strong attention to detail and accuracy in financial data.
• Ability to work independently and manage multiple priorities in a fast-paced environment.

Additional Skills & Qualifications

• Experience working in a remote-first organization.
• Comfort working across multiple legal entities, including a 501(c)(3), 501(c)(4), and single-member LLC.
• Familiarity with time tracking and billing by entity or project.
• Strong organizational skills and the ability to meet tight deadlines, such as a 10-day close.
• Effective communication skills for collaborating with finance colleagues and other stakeholders.
• Interest in or familiarity with mission-driven and nonprofit work.

Work Environment

This role operates in a remote-first environment, allowing you to work from your preferred location while collaborating virtually with the finance team. You will report to the Director of Finance and work alongside another Senior Accountant, using tools such as Sage Intacct, Ramp, Paychex, Microsoft Office, and Google Suite to complete your work. The organization manages three entities—a 501(c)(3), 501(c)(4), and a single-member LLC—so you will regularly track time and billing by entity. The pace is fast, with a 10-day monthly close cycle and overlapping priorities, and the culture emphasizes mission-driven work, collaboration, and accountability in a fully remote setting.

This is a Contract position based out of Washington, DC.

The pay range for this position is $50.00 - $60.00/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

This is a fully remote position.

This position is anticipated to close on Jun 26, 2026.

About Aston Carter

Aston Carter provides world-class corporate talent solutions to thousands of clients across the globe. Specialized in accounting, finance, human resources, talent acquisition, procurement, supply chain and select administrative professions, we extend the capabilities of industry-leading companies. We draw on our deep recruiting expertise and expansive network to meet the evolving needs of our clients and talent community with agility and excellence. With offices across the U.S., Canada, Asia Pacific and Europe, Aston Carter serves many of the Fortune 500. We are proud to be a ClearlyRated Best of Staffing® Platinum Award winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email astoncarteraccommodation@astoncarter.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.