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      Cornerstone Research

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      Data Scientist I Interview

      Sep 29, 2025
      Anonymous Interview Candidate
      No offer
      Neutral experience
      Easy interview

      Application

      I applied through an employee referral. The process took 4 weeks. I interviewed at Cornerstone Research in Jul 2025

      Interview

      The role was advertised as Data Scientist, but the interviews were more aligned with data engineering and data analysis. No predictive modeling or machine learning questions were asked. The process began with an informational call with a hiring manager, focused mostly on if I understood what economic consulting was and interest in the field. The first round included two interviews: one behavioral and one “technical,” which involved walking through how to populate an Excel sheet from hypothetical tables. Despite being told to expect a coding assessment in Python, R, or SQL, no programming was tested. Next was a take-home case study to design a pipeline that could consolidate data from multiple CSV/Excel files for business analysis. The final round consisted of three interviews centered on my resume, goals, and interest in consulting, with no technical questions. Overall, my experience was neutral since the interview process seemed poorly organized at times. It felt like the interviewers at times were lost on what to ask since the data science team is an collections of either data engineers or data analysts, making their background not directly applicable to my more traditional data sci background.

      Interview questions [1]

      Question 1

      The case study tested topics in data extraction, transformation, and querying.
      1 Answer

      Cornerstone Research interviews FAQs

      • Candidates applying for Data Scientist I roles take an average of 30 days to get hired, when considering 1 user submitted interviews for this role. To compare, the hiring process at Cornerstone Research overall takes an average of 17 days.
      • Common stages of the interview process at Cornerstone Research as a Data Scientist I according to 1 Glassdoor interviews include:

        Presentation:  100%

      • Here are the most commonly searched roles for interview reports -

        1. Analyst(130) ;
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        10. Senior Manager(3) ;
        11. Account Manager(2) ;
        12. Research Analyst(2) ;
        13. Research Assistant(2) ;
        14. Summer Intern(2) .


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