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Senior Accountant

Montaihealth

Cambridge, MA (Montai Therapeutics) Hybrid permanent

Posted: March 23, 2026

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Quick Summary

Join our team as a Senior Accountant to help us drive financial success in our innovative biotechnology company.

Job Description

Montai Therapeutics, Inc., is based in Cambridge, Massachusetts and was founded in 2019 by Flagship Labs, the innovation branch of Flagship Pioneering, which is a venture capital firm that invests in biotechnology, life sciences, health and sustainability companies. The Company is a privately held company focusing on its CONECTATM platform to identify new small molecule medicines known as AnthromoleculeTM therapeutics for chronic diseases.

Montai is seeking an experienced and talented accounting professional to join a first-in-category organization. The Senior Accountant will be an instrumental player in the month end close, will be responsible developing and implementing new accounting policies and procedures to scale within the organization, provide business insights to our leaders to measure progress on company performance, and assist with enhancing companywide financial reports, including enhanced analytics, cash flow management and consolidated reporting. This role will report to the Controller.

Key Responsibilities:

• Perform and assist with month-end and quarter end close accounting tasks including preparation of journal entries ensuring compliance with US GAAP

• Conduct monthly and quarterly account reconciliations to ensure accurate reporting and ledger maintenance

• Review of P&L accounts to resolve classification issues

• Ensure that reconciliations, supporting schedules and analysis are completed on a timely basis and in accordance with the monthly closing schedule

• Partner with Controller to develop and update annual budget and monthly forecasts

• Preparation and assistance with month end analytical review of actual versus budget/forecast

• Provide Ad-Hoc Reporting and Analysis

• Monitor and review new accounting pronouncements and implement where necessary

• Responsible for annual fixed asset observation and asset tracking

• Assists with internal and external reporting and, when applicable, with drafting and tie-out of the financial statements

• Ensures internal controls compliance for the responsible area, including implementing improvements to enhance the efficiency of current controls

• Supports the external audit firm in their annual audit

• Supports income tax provision and tax return process

• Assists with specific projects and initiatives unique to a fast-growing biotechnology start-up, such as system implementations, updates and business process improvements and other ad hoc projects

Qualifications:

• Bachelor’s degree in accounting is required

• CPA and 2-3 years of Big Four public accounting experience is preferred

• 1-2 years of biotechnology or life science industry experience preferred

• Substantial experience with GAAP financial reporting

• Extensive experience with Microsoft Excel and Word

• Detail-oriented personality

• Ability to manage multiple projects in a fast-paced environment

• Experience with NetSuite a plus

• Must have excellent analytical skills, with very strong attention to detail

• Ability to work both independently and in a collaborative team setting

• Flexibility and ability to adapt to changing conditions and different culture

• Ability to work within and meet all deadlines while executing on multiple deliverables

• Ability to identify errors and root causes of errors, develop workable solutions or alternatives

• Flexible, personable team-player, comfortable in a fast-paced, small company environment

• Proven ability to set and meet ambitious deadlines, handle numerous multifaceted financial matters and see projects through to conclusion

• Strong written and verbal communication skills and demonstrated ability to work collaboratively with both scientists and management

• Ability to distill complexity and to communicate decisively with sound judgment

• Ability to self-motivate and function independently, driven towards superior effort and performance and the desire to work in a very dynamic environment

Location: Hybrid role in Cambridge, MA

Montai is committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status.

More About Flagship Pioneering

Flagship Pioneering is a bioplatform innovation company that invents and builds platform companies, each with the potential for multiple products that transform human health or sustainability. Since its launch in 2000, Flagship has originated and fostered more than 100 scientific ventures, resulting in more than $90 billion in aggregate value. Many of the companies Flagship has founded have addressed humanity’s most urgent challenges: vaccinating billions of people against COVID-19, curing intractable diseases, improving human health, preempting illness, and feeding the world by improving the resiliency and sustainability of agriculture. Flagship has been recognized twice on FORTUNE’s “Change the World” list, an annual ranking of companies that have made a positive social and environmental impact through activities that are part of their core business strategies, and has been twice named to Fast Company’s annual list of the World’s Most Innovative Companies. Learn more about Flagship at www.flagshippioneering.com.

At Flagship, we recognize there is no perfect candidate. If you have some of the experience listed above but not all, please apply anyway. Experience comes in many forms, skills are transferable, and passion goes a long way. We are dedicated to building diverse and inclusive teams and look forward to learning more about your unique background.

Recruitment & Staffing Agencies: Flagship Pioneering and its affiliated Flagship Lab companies (collectively, “FSP”) do not accept unsolicited resumes from any source other than candidates. The submission of unsolicited resumes by recruitment or staffing agencies to FSP or its employees is strictly prohibited unless contacted directly by Flagship Pioneering’s internal Talent Acquisition team. Any resume submitted by an agency in the absence of a signed agreement will automatically become the property of FSP, and FSP will not owe any referral or other fees with respect thereto.

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