Finance Intern, Accounting

Mimecast is seeking a motivated undergraduate intern for Summer 2026 to join their Accounting team. This hybrid role, based in Lexington, MA, offers broad exposure across various finance functions like Accounting, Finance, Tax, Treasury, Procurement, Corporate Development, or Finance Transformation. The intern will gain a holistic view of a software company's financial and strategic operations, working closely with finance teams to develop critical thinking, problem-solving, and management skills in a real-world setting.

Must Have

• Undergraduate student
• Proficiency with Microsoft Excel
• Proficiency with PowerPoint
• Coursework in accounting fundamentals
• Strong critical thinking skills
• Strong organizational skills
• Attention to detail and accuracy
• Excellent written communication skills
• Excellent verbal communication skills

Good to Have

• Financial modeling experience
• Experience with accounting software or ERP systems
• Major / concentration in Accounting
• Interest in technology or cybersecurity

We are seeking a motivated undergraduate intern to join our Accounting team for Summer 2026! This multi-faceted role, while rooted in the fundamentals of corporate accounting, will provide a broad exposure across Accounting, Finance, Tax, Treasury, Procurement, Corporate Development or Finance Transformation functions providing a holistic view of how a software company operates financially and strategically. You’ll work closely with other finance functions and develop both

critical thinking, problem solving and management skills

in a real-world setting. This is a hybrid position consisting of 2-3 days per week in our Lexington MA office.

What You'll Do

Drive Process Excellence

• Take ownership of a project aimed at solving a real business challenge and help drive a permanent solution to the problem
• Collaborate with the accounting team to analyze workflows and recommend efficiencies
• Leverage AI and other technology to contribute to process improvement initiatives within the accounting function
• Work alongside other teams on cross-functional projects

Apply critical thinking

• Analyze financial data to identify trends or discrepancies
• Recommend improvements to finance and business processes

Communicate findings

• Collaborate with team members to prepare reports and presentations for senior management.
• Present summaries and recommendations to accounting leadership

What You'll Bring

• Undergraduate student

(rising senior preferred)

• Proficiency with

Microsoft Excel and PowerPoint; financial modeling experience is a plus

• Coursework in accounting fundamentals (e.g., intro to financial or managerial accounting)
• Strong critical thinking and organizational skills
• Attention to detail and accuracy
• Excellent written and verbal communication skills
• Experience with accounting software or ERP systems (major / concentration in Accounting) nice to have
• Interest in technology or cybersecurity a bonus

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.

About Us

We save companies the embarrassment of awkward data slip ups by disrupting cybercriminal activity. We think fast, go big and always demand more. We work hard, deliver – and repeat. We grow with meaningful determination. And put success well within our reach. We empower each other, live by our values, and always deliver on our purpose. We push each other to be better and expect to be pushed back. This is a community of respect. Where everyone is counted.