Type · motivation
Why are you interested in strategy consulting at PS21, specifically within the advertising industry?
How to Pass the PS21 Strategy Consultant Interview in 2026
The PS21 DNA (TL;DR)
PS21's 'Brand Fame' philosophy drives the interview, assessing candidates' ability to conceive and execute campaigns that generate widespread cultural impact, akin to their 'Not Flamin' work for Burger King.
The PS21 Interview Loop
Your onsite loop will typically consist of 5 rounds.
- 1
Round 1
Recruiter ScreenMotivation, fit, why consulting. - 2
Round 2
Case InterviewMarket sizing, profitability, market entry, M&A - structured problem-solving with hypothesis-driven analysis. - 3
Round 3
PEI / Personal ExperienceSTAR-style stories on leadership, entrepreneurial drive, personal impact. - 4
Round 4
Fit / Partner RoundWhy this firm, why this office, deeper resume walkthrough with senior partner. - 5
Round 5
Behavioral / LeadershipPast evidence of ownership, influence, resolving conflict.
The Danger Zone: Top Reasons Candidates Fail
Based on our database of PS21 interview outcomes, avoid these common traps:
- Generic answer not tailored to PS21 or advertising.
- Focusing on the resistance without detailing their influence tactics.
- Ignoring the specific nuances of sustainable product marketing.
- Not considering external factors like market shifts or competitor actions.
Test Yourself: Real PS21 Questions
Three real prompts pulled from our database.
Type · entrepreneurial-drive
Tell me about a time you identified an unmet need or opportunity and took the initiative to create something new or improve an existing process, even without being asked.
Type · industry-knowledge
How do you see the advertising industry evolving in the next 5 years, particularly concerning the impact of AI and data privacy regulations?
+ many more questions, signals, and worked examples
Sign up to unlock the full PS21 grading rubric
PS21 Interview Question Bank
A sample from our database, grouped by round. Sign up to see the full set.
9 of 13 questions shown
1
Recruiter Screen
1- 1
Type · motivation
Why are you interested in strategy consulting at PS21, specifically within the advertising industry?
2
Case Interview
3- 2
Type · profitability
PS21 has seen a significant decline in profitability for its digital media buying services over the last two years. Analyze the potential causes and propose strategies to reverse this trend. - 3
Type · market-entry
A major CPG client wants to launch a new sustainable product line and needs to understand the optimal go-to-market strategy, including channel selection and communication. How would you advise them? - + 1 more questions in this round (sign up to unlock)
3
PEI / Personal Experience
3- 4
Type · entrepreneurial-drive
Tell me about a time you identified an unmet need or opportunity and took the initiative to create something new or improve an existing process, even without being asked. - 5
Type · leadership
Describe a situation where you had to lead a team through a challenging project with tight deadlines and conflicting priorities. What was your approach, and what was the result? - + 1 more questions in this round (sign up to unlock)
4
Fit / Partner Round
3- 6
Type · firm-fit
Based on your understanding of PS21's work and culture, what specific contributions do you believe you can make to our client engagements and internal development? - 7
Type · resume-walkthrough
Walk me through your experience at [Previous Company/Project]. What was your most significant accomplishment and what was the biggest challenge you faced? - + 1 more questions in this round (sign up to unlock)
5
Behavioral / Leadership
3- 8
Type · conflict-resolution
Describe a moment when your creative vision for a Brand Fame campaign clashed with a client's insistence on a safer, data-driven approach. How did you reconcile the need for cultural impact with the client's risk aversion? - 9
Type · ownership
Describe a situation where a project you were responsible for was at risk of failing. What steps did you take to regain control and ensure its success? - + 1 more questions in this round (sign up to unlock)
Unlock all 13 PS21 questions, free
No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.
Interview tracks at PS21
How PS21's DNA translates across functions. Pick your role.
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Practice PS21 interviews end-to-end
PS21 Mock Interview
Run a live mock interview with our AI interviewer using PS21-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.
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STAR Stories for PS21 Behavioral Rounds
Build a Story Bank of your past wins, mapped to the leadership signals PS21 interviewers grade on. Reuse them across every behavioral round.
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PS21 Interview Prep Hub
The frameworks behind every PS21 round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.
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Interview Frameworks
CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make PS21 interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.
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Sample answers
What a strong answer to these PS21 interview questions shows.
Why are you interested in strategy consulting at PS21, specifically within the advertising industry?
A strong answer shows: Specific knowledge of PS21's clients or campaigns.; Articulated understanding of the challenges and opportunities in the modern advertising landscape.; Clear connection between their skills/experience and the demands of strategy consulting in this sector..
Tell me about a time you identified an unmet need or opportunity and took the initiative to create something new or improve an existing process, even without being asked.
A strong answer shows: Demonstrates initiative beyond assigned duties.; Clear articulation of the problem, their solution, and the positive outcome.; Evidence of creative problem-solving or process improvement..
Frequently asked questions
How long does the PS21 interview process take?
Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.
How should I prepare specifically for PS21?
Focus on three things: (1) the company DNA shown above - what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.
Does this apply to engineering or design roles at PS21?
The DNA stays the same - what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.
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