Accounts Assistant

Costello-Medical-1; Boston (MA); Hybrid; USD 52,000 - 55,000; Full time

Benefits offered by this job

Hybrid working

Generous vacation

Flexible working hours

Private medical insurance

Dental insurance

401K plan

Life insurance

Education funding

Travel insurance

Job summary

Costello Medical, based in Boston, is seeking an Accounts Assistant to support our North American finance team. The role covers supplier invoicing, ledger maintenance across group companies, and financial reporting with training provided.

You’ll work in a hybrid model with opportunities to improve systems and processes. The role offers a starting salary around $52,000–$55,000 plus benefits, with immediate start in 2026 and an emphasis on accuracy, initiative, and cross-functional collaboration

Qualifications

• At least one year in a finance-related role or relevant educational background.
• Experience supporting ledger management, reconciliations, and financial reporting.
• Strong numerical accuracy and attention to detail.
• Excellent verbal and written communication and organizational skills.

Responsibilities

• Process supplier invoices, credit card transactions, and internal expenses.
• Bookkeep across group companies using AIQ, Rapport3 and Concur.
• Support financial reporting and data reconciliation activities.
• Advise science teams on expense management and invoicing procedures.
• Identify improvements to financial and administrative systems.
• Assist with budgeting, forecasting and month-end processes.

Skills

Accounts payable

Bookkeeping

Excel

Financial reporting

Education

Bachelor's degree in Finance or related field

Tools

Rapport3

AccountsIQ

Concur

Job description

Role Summary

• Responsibilities: By stepping into the Accounts Assistant role at Costello Medical, you will support with a wide range of financial tasks and processes to ensure the smooth operation of our North American financial functions
• Salary: $52,000 to $55,000 per year, depending on prior experience
• Benefits: Hybrid working options that allow you to work from home up to 50% of your time, generous vacation allowance, flexible working hours, private medical and dental insurance, 401K plan, life insurance, full funding for external training, comprehensive travel insurance and more
• Role Type: Full-time, permanent role
• Start Date: We are currently recruiting for an immediate start in 2026
• Application Deadlines: While there are no set application deadlines, we strongly recommend applying as early as possible. The role will close when a suitable candidate is found
• Location: This role is available in our Boston office

About the Role

As an Accounts Assistant at Costello Medical, you will play a key role within our Finance team, supporting with a wide range of financial tasks and processes to ensure the smooth operation of our North American financial function. You will have the opportunity to develop your skills across various areas of finance, including sales and purchase ledger, enabling you to take initiative and proactively shape the role as it evolves.

Key responsibilities will include:

• Processing supplier invoices, credit card transactions, and internal expenses
• Bookkeeping across all group companies using AIQ, Rapport3, and Concur
• Supporting financial reporting and data reconciliation activities
• Advising our scientific teams on expense management and invoicing procedures
• Identifying and suggesting improvements to financial and administrative systems
• Assisting with general financial duties such as budgeting, forecasting, and month-end processes
• Projecting a positive image of the Finance team and actively seeking to reduce the administrative burden placed on others

You will receive comprehensive one-on-one training from experienced team members, learning about the technical aspects of the role and effective project management.

Hybrid Working Policy: We recognize that working from home can improve work life balance, reduce commuting times and costs, and provide the opportunity to juggle personal commitments. At the same time, we believe that having face-to-face time in the office holds many benefits and is central to ensuring that the community we have created, where people have a workplace they belong to and feel part of, is never lost.

Therefore, we offer flexible working arrangements that allow our colleagues to work from home for up to half of the time, measured across a 2-week rolling period. Please note that as part of our wider flexible working policy, employees may work outside of Massachusetts for up to 4 weeks annually.

Career Profile

To learn more about the personal and professional development opportunities at Costello Medical, explore first-hand career profiles from our colleagues about their experiences with the company: https://www.costellomedical.co.uk/careers/working-at-costello-medical/

About You

We are looking for an enthusiastic and ambitious individual who is proactive, eager to embrace new challenges, and capable of providing high-quality support to our Finance team. You will enjoy developing, refining, and taking ownership of internal financial processes as the company continues to grow. You will also enjoy working in a fast-paced environment, learning about all aspects of our internal systems, and directly contributing to the advancement of our Finance function.

Essential requirements for the role are:

• A relevant educational background or at least one year of experience working in a finance-related role
• Experience supporting various areas of finance, such as ledger management, reconciliations, and financial reporting
• Excellent numerical skills and a strong attention to detail
• Strong communication skills, both written and verbal, with the ability to build robust and sustainable working relationships
• Exceptional organizational skills and the ability to prioritize tasks effectively
• An ability to plan and manage your own workload, meet deadlines, and collaborate effectively with others
• An interest in, and aptitude for, mastering new systems and internal processes
• Experience using Microsoft Office applications, particularly the VLOOKUP and pivot table functions in Excel
• Desired requirements for the role are:
• Practical experience using the Rapport3 and AccountsIQ platforms, as well as an understanding of other financial systems

About Costello Medical

Costello Medical is a rapidly growing global healthcare agency specializing in medical communications, market access, and health economic and outcomes research. We work with a wide range of clients, including the industry’s most successful pharmaceutical and medical technology companies, patient and public health bodies, and charitable organizations. We have been listed in the Top 100 Best Companies to Work For list since 2017 and were proud to receive B Corporation accreditation in 2022. Learn more about us, our work, and our mission on our website: https://www.costellomedical.com/

What We Offer

Alongside our award-winning company culture, where every team member is celebrated, respected, and has their voice heard, we are proud to offer a comprehensive benefits package that includes:

• A starting salary of $52,000 to $55,000 per year, depending on your previous experience, as well as a discretionary profit share bonus paid twice per year. Please note that we have established salary bands to ensure a fair and consistent approach for all applicants, eliminating the need for individual negotiations
• Private medical insurance with a company contribution
• Dental and vision coverage
• 23 days’ vacation leave, increasing by 1 day per year, to a maximum of 27 days. 6 public holidays plus 1 floating holiday
• The chance to work from home for up to half of your working time
• Retirement savings via a 401k plan with up to a 5% employer match
• Paid funding for external education and study leave
• Life insurance
• Comprehensive travel insurance
• Flexible and reasonable working hours
• Regular company-funded social activities

Visa Sponsorship

We welcome applications from international candidates, but we are unfortunately unable to provide visa sponsorship for working visas. Therefore, you must have the right to work in the US independently from the company. However, we are able to consider those on a temporary visa, such as an OPT visa.