Quest Diagnostics Interview Guide
Everything we know about interviewing at Quest Diagnostics: the process stage by stage, what each round tests, and compensation by level.
Interviewing at Quest Diagnostics
What the process looks like, and what Quest Diagnostics is really testing for.
Quest Diagnostics runs a fairly standard sequence for data-adjacent and engineering roles: you get an initial screening, then technical interviews and/or assessments, and the loop ends with final interviews and HR discussion. Across roles, the process repeatedly targets technical skills plus structured behavioral storytelling.
What you will actually be tested on shows up strongly in the extracted topic data. QA Engineering, STAR interview method, Java, technical writing, product management principles, and data science concepts all appear at the highest prominence. You should also be ready for DSA, STAT method of answering, Java 8 features, and pipeline building, since these are also highly represented.
The candidate-reported difficulty mix is mostly medium, with easy making up a large share and a small tail of hard and very hard questions. Candidate reports in the dataset show an offer rate of 0.0%, so you should treat outcomes as uncertain based on this data and focus on preparation for the specific technical and communication patterns shown in the topics.
Your interview prep here should not separate “technical” and “how you answer.” The topics data repeatedly flags STAR and STAT methods, plus interview communication and coordination, so you are expected to structure both your technical reasoning and your stories.
The Quest Diagnostics interview process
5 stages, based on 468 candidate reports.
Initial Screening
Varies by roleYou undergo an initial screening, which is reported as either with a recruiter or with HR depending on the role. The focus is behavioral questions and resume walkthroughs, and the goal is to assess basic qualifications and fit for the role.
Technical Interviews
Varies by roleYou meet with managers and possibly other interviewers for technical interviews. Reported focus includes product management principles, healthcare industry knowledge, and evaluating your technical skills and problem solving.
Technical Assessments and Team/Behavioral Interviews
Varies by roleSome roles include technical assessments such as writing samples or case studies, and coding evaluations to demonstrate ability. Other roles include team interviews with team members and senior scientists, plus behavioral assessments to gauge cultural fit and interpersonal skills.
Final Interviews and Final Discussions
Varies by roleYou may have final interviews that involve alignment with the company's goals and culture, plus engagement with multiple stakeholders. Some reports describe final discussions regarding the role, expectations, and potential offer.
HR Screening and HR Discussion
Varies by roleSome roles include an HR screening as an initial call with HR, and HR discussion as a final deep dive to wrap up the process. The HR discussion step is explicitly reported as part of the final stage.
What Quest Diagnostics evaluates
How often each skill shows up across reported interview loops.
Interview guides by role
Each guide has the questions Quest Diagnostics interviewers actually ask, the loop structure, and total compensation by level.
What Quest Diagnostics pays, by level
Estimated total compensation: base salary plus stock and annual cash bonus.
Insider tips
Patterns from candidates who got offers, and the mistakes that most often sink a loop.
Quest Diagnostics interview FAQ
Answered from real candidate and workplace data, marked up for rich results.
What people say about Quest Diagnostics
Verbatim snippets pulled from employee and candidate reviews.
The enforcement of no PTO in Q1 creates a challenging work environment.
Management should not allow individual managers to control PTO, as it fosters a toxic atmosphere.
Having a supportive manager can significantly enhance the work experience.
Leadership should develop a forward vision for the bioinformatics team and trust its members to drive progress.
Related company guides
Companies that hire for the same data roles, with the same depth of prep.
