Senior Internal Auditor

Why Join Our Team?

“Mimecast was built to deliver “relentless protection” and help customers build a more resilient world by defending against cyber disruption—especially across the email attack surface. You’ll join a company with a unique, welcoming culture and a strong community of high performers, problem solvers, and team players who bring passion and integrity to their work.

What You'll Do

• Maintain and administer the AuditBoard platform, ensuring accurate configuration, data integrity, and effective interface with the global accounting function
• Support the administration and monitoring of FloQast, including close checklist management, reconciliation tracking, and ensuring alignment between close processes and control documentation
• Document global business processes, including process flows, narratives, and risk and control matrices (RCMs)
• Identify control gaps and weaknesses within existing processes and recommend practical remediation steps
• Assist in the planning and execution of internal audits and control testing, including walkthroughs, test of design, and test of operating effectiveness
• Partner with process owners across finance, accounting, and other functions to understand workflows and ensure controls are appropriately designed and operating
• Support coordination with external auditors on control-related deliverables and requests
• Assist in tracking remediation of identified control deficiencies through to resolution
• Contribute to continuous improvement of audit methodology, tools, and documentation standards
• Leverage AI tools (e.g., Claude) to support process documentation, streamline control testing, and improve audit efficiency
• Prepare clear, well-organized audit workpapers and summary reports for management review

What You'll Need

• 5+ years of experience in internal audit, controls, or a related internal controls function
• Demonstrated experience documenting business processes (process narratives, flowcharts, RCMs)
• Familiarity with internal control frameworks (e.g., COSO)
• Hands-on experience with AuditBoard (or other internal control software) preferred
• Hands-on experience with FloQast or similar Accounting Close Management software preferred
• Strong understanding of accounting and financial processes; experience working with global accounting functions a plus
• Public US SEC company experience preferred
• Comfort leveraging AI tools (e.g., Claude) to support process documentation, control testing, and audit workpaper preparation
• Excellent written and verbal communication skills, with the ability to explain control concepts to non-audit stakeholders
• Strong analytical and problem-solving skills, with attention to detail
• Ability to manage multiple priorities and work independently in a global, cross-functional environment
• Bachelor's degree in Accounting, Finance, or related field; CPA, CIA, or CISA a plus

The base salary range for this position is $560k−$700k plus benefits. This range represents the minimum and maximum new hire compensation for this role. The position may also be eligible for incentive plans and additional benefits, in accordance with company policy and local regulations. Our salary ranges are determined by role, level, and location with individual compensation also dependent on factors such as qualifications, experience, and skills. Final offers will reflect these considerations and may vary accordingly.

Belonging at Mimecast

Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course.

We’re proud to be an Equal Opportunity and Affirmative Action Employer, and we’d encourage you to join us whatever your background. We particularly welcome applicants from traditionally underrepresented groups.

We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application.

Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment.