Mirion reviews

2.9

35% would recommend to a friend

(157 total reviews)

Thomas D. Logan

32% approve of CEO

38% positive business outlook

Mirion has an employee rating of 2.9 out of 5 stars, based on 157 company reviews on Glassdoor which indicates that most employees have an average working experience there. The Mirion employee rating is in line with the average (within 1 standard deviation) for employers within the Manufacturing industry (3.5 stars).

Reviews by job title

157 reviews
1.0
Aug 18, 2025

Leaking like a sieve.

Recommend
CEO approval
Business Outlook

Pros

Fellow coworkers are nice. The products are interesting. The market trend for Mirion is going up. Nuclear industry growth in the future with SMRs.

Cons

Low pay for detector production workers and techs. The company does not promote people the way all other companies do. Most companies promote based on yearly reviews and performance, but it appears this company only promotes if you try to leave, or complain to the right people. Management literally has no idea what your background is, what work you do, or how much, and they don't seem to really care. The company typically hires new people externally than promote internally. New employees getting paid more than ones that have been here for years. Very high turn over rate. Rude management. Bonus system has been reduced. They used to have farewell retirement parties and promotion parties for employees in celebration, they don't even bother sending emails out about either anymore in Detectors. Management keeps rushing detectors out the door, constantly skipping several parts of the testing QA, and ignoring clear signs of failure to meet quotas. People that get hired leave relatively quickly.

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Mirion Response
10mo
Thank you for sharing your honest feedback regarding your experience in detector production at Mirion. We understand and appreciate the concerns you have raised about compensation, promotion practices, management awareness, employee recognition, and quality assurance processes. At Mirion, our goal is to foster a transparent, respectful, and inclusive environment where every employee feels valued and heard. We regret to hear that your experience did not meet your expectations in several areas. Your feedback provides valuable insight as we continue to review and improve our processes, including compensation, career development, and communication. If you wish to continue this conversation, please reach out to us anytime at glassdoor@mirion.com.
2.0
May 29, 2025
Recommend
CEO approval
Business Outlook

Pros

In my opinion, Mirion is a great stepping stone to obtain either research or industrial experience that later on gets you a job that pays much more. Mirion in my opinion is not a 'forever job' In my opinion the atmosphere in some spaces are open for new ideas and solutions. The company does a lot of kaizens and Continuous Improvement, though I don't see many changes as a result. They have little food-truck events or yearly Christmas parties or picnics for employees. Cafeteria with breakfast and lunch every day for purchase. Snack bar with drinks and snacks for purchase. Company will try an make an counter offer if another company tries to hire you, showing they will fight for you. The technologies are very cool and it is all very fun to learn about. Each department's directors and management are easy to talk to and they want you to succeed. Has program for paying tuition if you continue schooling for work.

Cons

I don't like the pay especially for jobs that are requiring a STEM degree. The work instructions appear old and outdated compared to the actual work processes. Managers seem disconnected from lower level workers. They used to offer certificate trainings for things like soldering but that halted a few years ago. They used to have a pretty good production bonus but they lowered it to cut costs. Its difficult for departments to get approval to approve replacement positions for those who leave, causing positions to have no backfill or training. It's hard for department heads to get approval for budget and raises for their employees, causing a lack of upwards mobility. They used to have a performance-based luncheon system that they removed. It appears difficult to receive promotions despite receiving great managerial reviews, this is likely caused by the fact that all promotions need to be approved by corporate. In my opinion it appears that management does not know the background or skills of their employees Corporate management is entirely detached from production management. As a public company, corporate only cares about increasing profit for shareholders by increasing production and cutting cost. In my opinion, they are doing this backwards. They are cutting costs by cutting employees, pay, and benefits of production facilities which is in turn hurting production. Corporate is urging general managers to cut costs by any means. Job security is at risk, and job advancement is practically nonexistent, despite how hard production directors fight for it. Corporate meanwhile is filled with so many VPs, managers, and directors, that it's hard for the produced cash flow to go anywhere else. The money is not reinvested into the cash producing factories or employees, it is used to further expand the overhead corporate structure, which cannot entirely prove the need for it's existence at this size. As the money is not reinvested into the production facilities, production does not grow. Which means the only way to make more cash flow, is to cut cost from those very same production facilities (as the corporate structure will never cut cost from itself). This causes our production facilities to be working too thin and lean, starving off the experienced workforce, and being unable to train replacements.

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Mirion Response
10mo
Thank you for taking the time to share your feedback. We sincerely appreciate your candor and detailed observations regarding compensation, work instructions, management practices, training opportunities, advancement processes, and the overall direction of company policy. We recognize that these issues are important to you and have a significant impact on your daily work experience. We also acknowledge your concerns regarding the connection between corporate management and production, as well as the effectiveness of cost-saving measures. We encourage you—and anyone else who shares these concerns—to continue the conversation. Please feel free to reach out to glassdoor@mirion.com to provide additional thoughts or suggestions. Constructive dialogue is essential to our growth, and your feedback will be considered as we work towards making improvements.
3.0
Sep 8, 2020
Recommend
CEO approval
Business Outlook

Pros

Good people on lower levels.

Cons

Revenue driven management since merger completion, chasing the stock market and killing company culture in the process.

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Mirion Response
5y
Thank you for providing feedback on working at Mirion. We are continually looking for ways to improve our corporate culture and would appreciate the opportunity to further discuss your experience. Please send an email to glassdoor@mirion.com to share additional details on your time with Mirion. Thank you in advance for your assistance.
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Glassdoor has 193 Mirion reviews submitted anonymously by Mirion employees. Read employee reviews and ratings on Glassdoor to decide if Mirion is right for you.