Staff Accountant

Company: Mosaic Biosciences
Location: Boulder
Posted on: February 14, 2026

Job Description:

Job Description Job Description Mosaic Biosciences is a biotherapeutics drug discovery company that partners with biopharmaceutical companies to discover novel protein and antibody therapeutics. Our experienced and dedicated research teams collaborate with our partners to design, manage, and execute research programs to rapidly advance clinical candidates, starting at any point from early discovery into preclinical development. Position Summary: Mosaic is looking for a detail-oriented Staff Accountant to own the day-to-day accounting operations. This is a hands-on role that involves close collaboration with teams across the organization. This role supports day-to-day accounting operations, including general ledger activities, journal entries, reconciliations, and month-end close. Responsibilities may include accounts payable, sales & use tax, fixed assets, and bank reconciliations. The role will also assist with financial reporting, special projects, and process improvements. Key Responsibilities: Prepare and review journal entries and account reconciliations for month-end close Oversee accounts payable process Manage daily cash and bank reconciliation Prepare monthly sales & use tax returns Assist in the preparation of internal and external financial statements. Support the external audits and prepare audit-ready documentation. Work with Project Management to obtain and review time-tracking data Complete ad hoc financial analysis and special projects, as needed Qualifications & Skills: Bachelor’s degree in accounting or a related field Strong understanding of GAAP Advanced Excel skills High attention to detail with the ability to meet deadlines in a fast-paced environment Strong communication skills and a collaborative mindset Preferred Qualifications: Industry accounting experience Experience with accounting software (e.g., QuickBooks or similar) Experience with biotech, pharma, or R&D-heavy organizations Powered by JazzHR ORRelW8vcA

Keywords: Mosaic Biosciences, Lakewood , Staff Accountant, Accounting, Auditing , Boulder, Colorado