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      Cirium

      Part of RELX

      Engaged Employer

      Cirium reviews

      3.1

      45% would recommend to a friend

      (106 total reviews)

      Jeremy Bowen

      83% approve of CEO

      50% positive business outlook

      Ratings by category

      3.7

      Work/Life balance

      3.5

      Culture & values

      3.3

      Diversity & inclusion

      3.2

      Compensation and benefits

      2.7

      Senior management

      2.7

      Career opportunities

      Cirium has an employee rating of 3.1 out of 5 stars, based on 106 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Cirium employee rating is in line with the average (within 1 standard deviation) for employers within the Aerospace & Defense industry (3.6 stars).

      Ratings by demographic groups

      Reviews by job title

      106 reviews
      4.0
      Jun 26, 2026

      Great culture and job security, but low pay and slow advancement

      Principal software engineer
      Recommend
      CEO approval
      Business Outlook

      Pros

      Work-life balance and job security are important factors. It is a great culture and environment, especially for those with families. Good products.

      Cons

      The salary is low, and not much training is provided. Additionally, career advancement is slow.

      avatar
      Cirium Response
      2d
      Thank you for taking the time to share your feedback and for being part of Cirium. We're pleased to hear that you've had a positive experience with our culture, work-life balance and job security. Creating an environment where colleagues can do their best work while managing personal and family commitments is important to us. We offer flexible and hybrid ways of working, family-friendly policies, wellbeing support and a culture that encourages people to maintain a healthy balance between work and life. It's also great to hear that you value our products and the work we're doing across the aviation industry powering every decision connected to aviation. We also appreciate your feedback regarding compensation, training and career progression. We recognise that these areas play an important role in attracting, developing and retaining talent. Our compensation reviews are supported by regular market analysis, and we continue to invest in learning, development and career growth opportunities for our people. Within our technology teams, we're continuing to strengthen opportunities for learning and development through technical communities, access to online learning resources and knowledge-sharing forums. We encourage everyone to own their development and learning plans and discuss these with their line manager. We are also focused on helping colleagues understand career pathways and growth opportunities across Cirium and the wider business. Thank you again for sharing your perspective. Feedback like yours helps us identify where we're doing well and where we can continue to improve.
      5.0
      Jun 18, 2026

      Strong culture and work-life balance

      Business intelligence analyst
      Recommend
      CEO approval
      Business Outlook

      Pros

      work-life balance; mentoring; culture; engagement activities;

      Cons

      pay, cross-function collaboration, nothing much else

      avatar
      Cirium Response
      2d
      Thank you for taking the time to share your feedback and for your contribution to Cirium. We're delighted to hear that you had a positive experience with our culture, mentoring opportunities and work-life balance. Creating an environment where colleagues feel supported, connected and able to grow is important to us, so it's particularly encouraging to hear your recognition of our culture and engagement activities. We also appreciate your feedback regarding compensation and cross-functional collaboration. We recognise that both play an important role in the employee experience and are areas where we continually look for opportunities to improve. Our compensation reviews are supported by regular market benchmarking and analysis to help ensure pay remains competitive and aligned with market conditions. We also continue to invest in learning and development opportunities that help colleagues build skills and progress their careers over time. As our business evolves, we're focused on strengthening collaboration across teams and helping colleagues share knowledge, expertise and perspectives more effectively. Thank you again for sharing your experience. We wish you every success in the next stage of your career.
      2.0
      Jun 18, 2026

      Toxic culture and poor leadership hinder growth opportunities

      Senior software engineer
      Recommend
      CEO approval
      Business Outlook

      Pros

      2 hrs per week for Learning(if you get capacity) Some really great employees benefits Potential to be better as product as well a culture.

      Cons

      List is unlimited and is getting bigger since a lot has change (bad change) from last year in company's culture. At high level, the current state of technical leadership is the result of bad hiring and decisions.(Its quite visible how series of bad decision in hiring the position of leaders and promoting has impacted not only all engineering teams but some of the most foundational team(which is now gone entirely) and as a result entire Engineering is suffering). The decision making is in silos, and no VP or Directors now knows or understands or even wants to understand how deeply we are in the puddles. HR is either unaware or intentionally has decided to keep the eyes shut on the state of this. The internal feedback system once used for honest feedback for improvement is now faked to positive to avoid the retaliation from the leaders(as no one wants to lose the job, we have Mortagage to pay). Leadership believes in saving their reputation by covering up themselves from bad decisions which resulted in many great people leaving. Company now do not has retention as priority, its clearly has communicated and hinted over and over again, that everyone is replaceable, and we should do what has been asked for, which has created a hostile environment. These issues have been here for almost a year and not even a single change has been made. We have been told over all hands to speak up, do the right thing but if one speaks up we'll only be with the option to retaliate or quit. Career opportunities is now not something that will be given to you if you deserve it or through a transparent process, but if you are from the same other company everyone is coming from, or you have certain influence over the Leadership.

      avatar
      Cirium Response
      2d
      Thank you for taking the time to share your feedback and for your many years with Cirium. We're sorry to hear that your experience over the past year has not reflected the culture and environment we strive to create. We appreciate you taking the time to provide such detailed feedback. At the same time, we're pleased to hear that you've found value in our employee benefits and dedicated learning time. Thank you for sharing your concerns regarding culture, leadership and career development. Feedback like this is important, and we take it seriously. We are committed to creating an environment where colleagues feel supported, respected and able to share their views openly. Trust, transparency, collaboration and opportunities for growth are fundamental to a positive employee experience. As our business continues to evolve, we remain focused on strengthening these areas and improving the experience of our colleagues across the organisation. Thank you again for sharing your perspective. We value open dialogue and encourage colleagues to continue providing feedback through the channels available to them. Listening to and learning from our people is an important part of how we move forward as a business.
      Viewing 73 - 75 of 106 Reviews
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      ReviewsCirium reviews

      Glassdoor has 107 Cirium reviews submitted anonymously by Cirium employees. Read employee reviews and ratings on Glassdoor to decide if Cirium is right for you.