About This Role

As an Accounting Co-op at Rennscot MFG, you'll get end-to-end exposure to the finance function of a growing manufacturing startup. This hands-on role supports multiple areas of our Finance department, including accounts payable, bank and balance sheet reconciliations, inventory counts, reporting, audit preparation, and data maintenance. Along the way, you'll learn professional finance management in a manufacturing environment and gain practical experience with the systems we use every day, including Xero and ProShop.

By the end of your term, you'll be self-sufficient with daily accounting tasks, confident in Xero and ProShop, and familiar with the fundamentals of cost accounting for manufacturing. We're ideally looking for someone interested in staying with us for more than one semester, with the potential to grow into a full-time role.

What You'll Do

• Own Full-Cycle Accounting

  • Process accounts payable, including invoice entry, coding, approvals, and vendor payments

  • Record journal entries and support month-end close activities

  • Maintain accurate and complete financial records in Xero

  • Perform data maintenance to keep vendor, customer, and account information clean and up to date

• Reconcile and Validate

  • Perform bank reconciliations and resolve discrepancies

  • Reconcile balance sheet accounts and investigate variances

  • Prepare supporting schedules and documentation for audit preparation

  • Partner with the Finance team to ensure records are accurate and audit-ready

• Report on the Business

  • Prepare recurring financial reports and supporting analyses

  • Build and maintain Excel workbooks, trackers, and templates

  • Support ad hoc requests and analysis for the Finance team and leadership

  • Identify opportunities to streamline and improve reporting processes

• Support Inventory and Cost Accounting

  • Participate in inventory counts and reconcile physical counts to system records

  • Use ProShop to support job costing, materials, and inventory tracking where applicable

  • Learn the fundamentals of manufacturing cost accounting, including material, labor, and overhead

  • Collaborate with operations and production teams to ensure accurate cost data

• General Support

  • Support other departments as needed based on business demand

  • Attend team meetings and contribute actively to discussions, bringing a fresh perspective and a willingness to learn

  • Complete an end-of-term summary documenting key contributions, lessons learned, and recommended improvements for handoff to the engineering team.

  • Support other projects and assignments as needed.

What We're Looking For

• You've Got the Foundation

  • Currently enrolled in an accredited Bachelor's Degree program in Accounting, Finance, or a related field.

  • Solid accounting knowledge, including debits and credits, journal entries, and reconciliations

  • Strong Excel skills (formulas, lookups, pivot tables, and data organization)

  • Strong attention to detail and commitment to accuracy

  • Eagerness to learn and take ownership of your work

  • Ability to work both independently and collaboratively

  • Prior job or internship experience in accounting, bookkeeping, or finance

  • Experience with Xero, QuickBooks, or other accounting software

  • Exposure to ERP or manufacturing systems such as ProShop

  • Familiarity with cost accounting or inventory accounting concepts

  • Experience supporting month-end close or audit preparation

  • Interest in continuing beyond a single co-op term, with the potential to develop into a full-time role

Who You Are - Skills & Abilities

• Detail-oriented – You know that small errors add up and accuracy matters

• Analytical – You like digging into the numbers to understand what's really going on

• Organized – You keep records, files, and deadlines under control

• Curious about manufacturing – You want to understand how a growing manufacturing business really works

• Self-starter – You take initiative and work toward becoming self-sufficient

• Problem-solver – When something doesn't reconcile, you're energized to figure out why

• Improvement-driven – You're always asking, "how can we make this better?"

• Adaptable – You thrive in a dynamic startup environment where priorities shift

• Collaborative – You work well with finance, operations, and production teams to get results

• Growth-minded– You're looking for more than a semester and want to build a career

Physical Requirements

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

• Regularly operates a computer workstation for extended periods for data entry, reconciliations, reporting, and work in Excel, Xero, and ProShop.

• Regularly sits for extended periods in an office environment, with the ability to change positions as needed.

• Occasionally stands, walks, and moves throughout the manufacturing facility during inventory counts and when collaborating with operations and production teams.

• Occasionally bends, stoops, kneels, and reaches to locate, count, and verify inventory on shelving, racks, and storage areas.

• Occasionally lifts and carries files, office supplies, and inventory items weighing up to 25 lbs.

About Rennscot MFG

Rennscot MFG, founded in 2017, started as a motorsports-focused shop in the aftermarket automotive industry. Now, they are a leading provider of advanced manufacturing services located in Woburn, MA. Rennscot MFG strives to be more than just a machine shop; they solve problems in innovative ways, using a suite of integrated services to fuel a passion for ideation. With a focus on diversifying into commercial and critical technology sectors, Rennscot MFG delivers cutting-edge technologies and unwavering commitment to quality. They offer a comprehensive range of services, including reverse engineering, metal & polymer additive manufacturing, and precision machining to support various industries’ needs. For more information, visit rennscotmfg.com.

ITAR Requirement

To conform to US Government export regulations, including the International Traffic in Arms Regulations (ITAR) you must be a US citizen, lawful permanent resident of the US, protected individual as defined by 8 U.S.C. 1324b(a)(3), or eligible to obtain the required authorizations from the US Department of State. Learn more about the ITAR here: https://www.pmddtc.state.gov/ddtc_public/ddtc_public?id=ddtc_public_portal_itar_landing.

EEO Statement

Rennscot MFG is an Equal Opportunity Employer; employment with Rennscot MFG is governed on the basis of merit, competence and qualifications and will not be influenced in any manner by race, color, religion, gender, national origin/ethnicity, veteran status, disability status, age, sexual orientation, gender identity, marital status, mental or physical disability or any other legally protected status.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.