Senior Accounting Manager

Position Summary

We are seeking a highly motivated and detail-oriented Senior Accounting Manager to lead critical accounting initiatives focused on accounting tasks related to ERP system integrations, Transition Services Agreements (TSAs), process improvements, and balance sheet cleanup for a recent $1B acquisition. This role is ideal for someone who thrives in a dynamic environment and enjoys tackling complex projects that enhance the scalability, accuracy, and efficiency of the accounting function.

This individual will partner cross-functionally with key leadership in Finance, IT, Operations, and external stakeholders to drive key transformation efforts, including post-acquisition integrations, ERP/system implementations, and remediation of historical accounting issues.

Key Responsibilities

• Support M&A related integration activities, including driving the discovery and design phase to transitioning accounting activities into our team

• Lead accounting support for a multi-phase ERP implementation within a complex carve-out environment, including navigating interim-state processes, data inconsistencies, and establishing controls between system rollouts

• Partner with integration, finance, IT, legal, and operations teams to align control frameworks, policies, and procedures once integrated into Thermo Fisher ERP

• Review and analyze monthly flat file entries (until ERP implementation), ensuring completeness and accuracy of financial information and investigating variances and data fluctuations

• Serve as the accounting lead for the Transition Services Agreements (TSAs), including preparation, review, and oversight of settlement statements and related processes

• Monthly monitoring of TSA activity and invoices between the local jurisdictions and proactively identify, investigate, and resolve payment issues, billing discrepancies with TSA Invoices

• Participate in developing and implementing plans to transition accounting functions from the TSA to internal teams or shared services.

• Evaluate and design control design and operating effectiveness, particularly in newly integrated processes and systems.

• Lead remediation efforts for control deficiencies, ensuring timely and sustainable resolution and ensure timely closure of commitments made in representation letters

• Serve as a key liaison with external auditors and internal audit for the conveyed and commingled entities.

• Develop documentation for processes, integrations, and accounting treatments to support scalability and audit readiness

• Oversee periodic testing and analytics to validate the effectiveness of revenue and inventory cutoff controls.

• Ensure accounting policies and procedures are consistently applied across newly integrated or evolving business units

Team Leadership & Capability Building

• Establish clear priorities, accountability, and performance standards during periods of change.

• Promote a strong culture of ethics, compliance, and continuous improvement.

• Leverage data, technology, and best practices to modernize the control environment.

Qualifications Required

• Bachelor’s degree in Accounting, Finance, Business, or a related field.

• 8–12+ years of experience in Accounting, internal controls, or Integration.

• Demonstrated experience supporting mergers, acquisitions, or large-scale integrations.

• Strong knowledge of internal control best practices.

• Proven experience leading complex accounting projects (e.g., ERP implementations, M&A integrations, system conversions)

• Proven ability to lead complex initiatives in fast-paced, evolving environments.

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Preferred

• CPA, CIA, CISA, or similar professional certification.

• Experience in a global, matrixed organization.

• Exposure to ERP implementations or system integrations (e.g., SAP, Oracle, JDE ).

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Key Competencies

• Integration and change leadership

• Hands-on, roll-up-your-sleeves mindset with a focus on execution

• Executive-level communication and influencing skills

• Risk-based thinking and sound judgment

• Cross-functional collaboration

• Strategic mindset with strong execution discipline