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Assistant Controller

Plexus · Buffalo Grove, IL · $124,200–$186,400 a year · Full time

Posted Sep 15, 2026 · We last checked this listing on Oct 6, 2026

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Likely interview questions for this role

Written from this job description, not a generic list. Each one notes what the interviewer is really checking.

About your past

Tell me about a time you found a significant accounting error. How did you handle it?

What they are checking: Whether they investigate and report errors openly, which is essential in a public company.

How do you explain financial results to operations managers who aren't accountants?

What they are checking: Whether they can help plant leaders understand and act on the numbers.

How do you develop and lead the accountants on your team?

What they are checking: Whether they coach and delegate, so the controller's office isn't dependent on a few people.

What would you do

Purchase price and manufacturing variances are much bigger than expected this month. How do you investigate?

What they are checking: Whether they can trace variances back to real causes like pricing, scrap or labor.

The plant manager asks you to delay recording an expense to next month. What do you do?

What they are checking: Whether they hold firm on accurate accounting even under pressure from leaders.

About the work

Walk me through how you'd run the month-end close for a manufacturing site.

What they are checking: Whether they know the close steps and deadlines and keep a site's numbers accurate and on time.

How do you handle inventory accounting and standard costing in a manufacturing plant?

What they are checking: Whether they understand standard costs, variances and inventory valuation, which drive a plant's profits.

What experience do you have with SOX controls, and how do you make sure your team follows them?

What they are checking: Whether they understand internal controls and documentation that a public company's auditors test.

How do you handle excess and obsolete inventory reserves, especially when customers may be liable for some inventory?

What they are checking: Whether they understand reserve judgment and customer liability arrangements common in contract manufacturing.

How would you prepare for an external audit?

What they are checking: Whether they keep reconciliations and support organized all year, so audits go smoothly.

Practice this interview out loud.

Offer builds a real interview for this exact role at Plexus from your resume and this job description, asks the questions one at a time, and tells you what landed. The first one is free.

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The full job description

As published by Plexus.

About us: At Plexus, our vision is to help create the products that build a better world. Driven by a passion for excellence, we partner with leading Aerospace/Defense, Healthcare/Life Sciences and Industrial companies to design, manufacture and service some of the world’s most transformative products, including advanced surgical systems, diagnostic instruments, healthcare imaging equipment, mission critical aerospace systems, and electric vehicle (EV) charging solutions. Visit Plexus.com to learn more about our unwavering commitment to our vision. When we invest in our people, we invest in building a better world. With a vision rooted in the wellbeing and inclusive engagement of our team members, our customers, their end users and our communities, people are the heart of what we do and who we are. It is our values that unite us and guide us in everything that we do, including how we operate, behave and interact to foster a workplace where every team member feels valued and empowered to contribute their best. Our values include: Growing our People, Building Belonging, Innovating Responsibly, Delivering Excellence and Creating Customer Success. As a team member, you will engage in impactful work through global collaboration and the use of emerging technologies, join an inclusive culture where every team member is valued and working toward a greater purpose, and be empowered to reach your full potential through various development programs designed to accelerate your growth. Plexus offers a comprehensive benefits package designed to support team members' wellbeing, including medical, dental, and vision insurance, paid time off, retirement savings, and opportunities for professional development. We also prioritize work-life balance and offer a variety of perks to enhance the team member experience. For more information, visit our US benefits website at usbenefits.plexus.com . Our commitment to pay range transparency fosters an equitable workplace, where everyone can feel valued. The annual compensation range for this position is stated below. The salary offered within this range will be based upon the geographic location, work experience, education, licensure requirements and/or skill level. Salary Range: $124,200.00 - $186,400.00 Purpose Statement: Support the controller in the management of the site finance team and the achievement of the organizational goals. Successor role to the controller. Key Job Accountabilities: • As a trusted and valued business partner provide guidance and support on performance, identifying and mitigating risks, while maintaining transparency, open communication, and engagement. • Challenge the status quo, identify areas for improvement, and understand the financial impact of these changes. • Analyze and understand business profitability, prepare forecasts, focus on predictability, and review performance versus expectations, demonstrating creative approaches to financial challenges. • Understand sector and site strategy, financial goals, and objectives, and support efforts to deliver these objectives and goals. • Develop a high-performing team, providing regular feedback, and focus on mentoring, personal and career development, succession planning and career mapping. • Responsible to exemplify and hold their team accountable to demonstrating the Plexus Core Values. Leader will focus on evaluating potential, driving succession planning, and ensuring their employees receive the development and coaching required to realize their full potential. Education/Experience Qualifications: • Bachelor’s degree and a minimum of 5 years of experience in the related field, or a Master’s degree and at least 3 years of relevant experience. May require previous supervisory experience. A minimum of a(n) Bachelor’s Degree in Business Administration is required; a(n) Bachelor’s Degree in Finance, Accounting or Economics is preferred • 5 years of related experience is required; In addition, 5 years of progressive direct or indirect leadership of financial professionals is preferred • An equivalent combination of education and experience sufficient to successfully perform the key job accountabilities may be considered. Other Qualifications: • Proficiency in Google Sheets or Excel is required. • Experience with or expertise in financial systems is strongly preferred. • Strong organizational skills, with the ability to prioritize and manage multiple tasks. • Excellent leadership, communication, collaboration and teamwork skills are essential. • Data storytelling and converting data into insights are strongly preferred. Physical Requirements: • Professional office environment with suitable lighting, comfortable temperatures, and low noise level. May require prolonged periods of sitting at a desk, using a computer, and other office equipment. Minimal physical activity is generally involved, emphasizing the importance of good posture and ergonomic workplace arrangements. This document does not represent a contract of employment and is not intended to capture every possible assignment the incumbent could be asked to perform. We are pleased to provide reasonable accommodations to individuals with disabilities or special requirements. If you need an application accommodation, please contact us by email at GHQ.TA@plexus.com . Please include your contact information and clearly describe how we can help you. This email is for accommodation requests only and cannot be used to inquire about the status of applications. We are an Equal Opportunity Employer (EOE) and do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. Some offers of employment are contingent upon successfully passing a drug screen and/or background check.

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