Author: Taylor Warfield, Former Bain Manager and interviewer

Last Updated: May 26, 2026

 

EY-Parthenon vs Monitor Deloitte is one of the most common comparisons consulting candidates ask about. Both are the strategy consulting arms of Big 4 firms. Both do work similar to McKinsey, BCG, and Bain.

 

The short answer: EY-Parthenon is larger, more transaction-heavy, and has a stronger pure strategy brand. Monitor Deloitte is smaller, more integrated into a Big 4 platform, and offers broader exit options through Deloitte's network.

 

By the end of this article, you will know exactly how the two firms compare on size, services, prestige, salary, culture, exit opportunities, and interview process. You will also know how to pick the right firm for your career.

 

But first, a quick heads up:

 

McKinsey, BCG, Bain, and other top firms accept less than 1% of applicants every year. If you want to triple your chances of landing interviews and 8x your chances of passing them, watch my free 40-minute training.

 

What Are EY-Parthenon and Monitor Deloitte?

 

EY-Parthenon and Monitor Deloitte are the dedicated strategy consulting practices inside EY and Deloitte. Both serve C-suite executives on corporate strategy, growth, mergers and acquisitions, and transformation. Both compete head-to-head with MBB on top-tier strategy projects.

 

The two firms share a similar origin story. Each is the result of a Big 4 firm acquiring a respected pure strategy boutique. The differences emerge in scale, focus, and brand independence.

 

What Is EY-Parthenon?

 

EY-Parthenon is the strategy consulting brand inside EY. The original Parthenon Group was founded in 1991 by Bill Achtmeyer and a small team of former Bain partners. EY acquired Parthenon in 2014 and kept the name, since Parthenon was the strongest pure strategy brand inside any Big 4 firm.

 

EY-Parthenon has grown aggressively under EY ownership. According to Consultancy.lat, the practice expanded from 350 consultants in 2014 to roughly 9,000 by early 2025. In 2025, EY moved its full Strategy and Transactions team under the Parthenon brand, taking total headcount above 25,000 across 150 countries.

 

EY-Parthenon's work clusters around three areas. Corporate and Growth Strategy covers traditional strategy projects like market entry, growth plans, and value creation. Transaction Strategy and Execution handles commercial and operational due diligence for private equity clients.

 

Turnaround and Restructuring Strategy advises distressed companies and their lenders. Private equity is the engine of the practice. Commercial due diligence (CDD) for PE funds makes up a large share of revenue, which is one reason EY-Parthenon's hours can run higher than peers.

 

What Is Monitor Deloitte?

 

Monitor Deloitte is the strategy consulting practice inside Deloitte Consulting. The original Monitor Group was founded in 1983 by Michael Porter and five other Harvard Business School entrepreneurs. Deloitte acquired Monitor in 2013 after Monitor filed for Chapter 11 bankruptcy.

 

Monitor Deloitte today has roughly 5,000 consultants across 27 offices in 17 countries. The practice sits inside Deloitte's much larger consulting business, which generates over $26 billion in annual revenue according to Statista. That makes Deloitte Consulting alone roughly as large as McKinsey, BCG, and Bain combined.

 

Monitor Deloitte's core work covers corporate and competitive strategy, market entry, growth, M&A, innovation, and business model transformation. The practice continues to use Monitor's original Strategic Choice Cascade framework (Where to Play, How to Win), developed by Roger Martin and A.G. Lafley.

 

Note that in the United States the Monitor Deloitte brand has become less distinct. Many former Monitor Deloitte consultants now sit inside Deloitte's broader Strategy and Analytics practice. The brand is still actively used in Europe, Asia, and Latin America.

 

What Are the Similarities Between EY-Parthenon and Monitor Deloitte?

 

EY-Parthenon and Monitor Deloitte share more than they differ on. Both are the strongest strategy practices inside their respective Big 4 firms. Both compete directly with MBB on top strategy projects.

 

Here are the main similarities:

 

• Both are tier 2 consulting firms, sitting one notch below MBB in prestige

 

• Both do corporate strategy, M&A, growth strategy, and transformation work for Fortune 500 clients

 

• Both use candidate-led case interviews similar to BCG and Bain

 

• Both pay close to MBB salaries at the entry and mid levels

 

• Both offer strong exit options into industry, private equity, and corporate strategy

 

• Both were created by Big 4 acquisitions of respected strategy boutiques

 

• Both serve C-suite clients on high-stakes strategic decisions

 

Compensation is similar at the analyst and consultant levels. Both firms pay roughly 5% to 10% below MBB for first-year consultants but well above standard Big 4 implementation consulting pay.

 

The interview process is also similar. Both firms use candidate-led case interviews, group case interviews, and behavioral interviews. Both heavily emphasize fit, since they want candidates who genuinely want to work there and are not using the firm as a backup.

 

What Are the Differences Between EY-Parthenon and Monitor Deloitte?

 

The key differences come down to size, focus, brand, culture, and exit opportunities. Here is a side-by-side comparison:

 

Feature	EY-Parthenon	Monitor Deloitte
Founded	1991 (Parthenon Group), 2014 (under EY)	1983 (Monitor Group), 2013 (under Deloitte)
Headcount	25,000+ (post-2025 expansion)	Roughly 5,000 strategy consultants
Global presence	150+ countries	27 offices in 17 countries
Brand independence	Strong, distinct brand within EY	Weaker in U.S., still distinct in EU and APAC
Core focus	PE, commercial due diligence, deal advisory	Corporate strategy, growth, innovation
Work intensity	Higher (CDD-heavy)	Moderate to high
Signature framework	Investor mindset, deal lifecycle	Strategic Choice Cascade
MBB exit chances	Slightly better for strategy seekers	Solid via integrated Deloitte exits

 

How Do They Compare on Size and Global Footprint?

 

EY-Parthenon is now significantly larger than Monitor Deloitte. After EY moved its Strategy and Transactions team under the Parthenon brand in 2025, EY-Parthenon's headcount reached more than 25,000 across 150 countries. Monitor Deloitte has roughly 5,000 dedicated strategy consultants.

 

Note that EY-Parthenon's 25,000 number includes the broader transaction services workforce, not just pure strategy consultants. The core strategy team at EY-Parthenon is closer to 9,000 to 10,000 consultants. Even so, that is roughly double the size of Monitor Deloitte.

 

Office presence also differs. EY-Parthenon operates in 150+ countries through EY's global network. Monitor Deloitte is more concentrated, with 27 offices in 17 countries.

 

For candidates outside the U.S., this matters more than it sounds. Monitor Deloitte may not exist as a distinct brand in your country, while EY-Parthenon almost certainly does.

 

How Do They Compare on Practice Areas and Work?

 

The biggest practical difference is the type of work you do day to day. EY-Parthenon is heavily focused on private equity and transactions. Monitor Deloitte is more focused on corporate strategy and growth.

 

At EY-Parthenon, roughly 50% to 60% of project work involves private equity clients. This includes commercial due diligence, operational due diligence, value creation plans, and exit readiness. The pace is fast because PE deals run on tight timelines.

 

At Monitor Deloitte, corporate strategy is the dominant work type. Projects include market entry, growth strategy, competitive positioning, innovation, M&A advisory, and business model design. Deal work exists but is a smaller share than at EY-Parthenon.

 

Industry coverage also differs. EY-Parthenon is particularly strong in education, financial services, technology, and life sciences. Monitor Deloitte's Boston office is known for life sciences, Chicago for innovation and consumer products through the Doblin practice, and New York for financial services and media.

 

How Do They Compare on Prestige and Brand?

 

EY-Parthenon has a slightly stronger strategy brand. Monitor Deloitte sits inside a larger and more recognizable parent firm.

 

EY-Parthenon was ranked 4th in the 2023 Vault Consulting 50 and 5th most prestigious overall, according to Wikipedia citing the Vault rankings. In 2025, IDC MarketScape named EY-Parthenon a leader in worldwide enterprise strategy consulting services.

 

Monitor Deloitte does not get ranked separately by Vault, since Deloitte Consulting is ranked as a whole. Within the consulting community, Monitor Deloitte is recognized as one of the top strategy practices outside MBB, but the brand has faded in the U.S. since Deloitte folded much of Monitor into the broader Strategy and Analytics practice.

 

For candidates who want to be known as a strategy consultant, EY-Parthenon's brand carries slightly more weight. For candidates who want the recognizable global Deloitte name on their resume, Monitor Deloitte may feel stronger.

 

How Do They Compare on Compensation?

 

Compensation is very close at the entry and senior consultant levels. Both firms pay roughly $100,000 to $115,000 in base for U.S. undergraduate hires, plus performance bonuses of $10,000 to $25,000. Both pay $175,000 to $225,000 in base for U.S. post-MBA hires, again with significant bonus.

 

The differences widen at the manager and partner levels. EY-Parthenon partners benefit from EY's PE deal flow and tend to earn more on the upside in strong M&A years. Monitor Deloitte partners benefit from Deloitte's broader platform of cross-sell opportunities, which provides more revenue stability.

 

Here is a rough U.S. compensation comparison based on Glassdoor and LinkedIn salary data from 2025 and early 2026:

 

Level	EY-Parthenon Total Comp	Monitor Deloitte Total Comp
Analyst (undergrad)	$110,000 to $135,000	$105,000 to $130,000
Senior Consultant	$135,000 to $175,000	$130,000 to $170,000
Manager (post-MBA)	$225,000 to $280,000	$220,000 to $275,000
Senior Manager	$280,000 to $375,000	$275,000 to $360,000
Partner	$700,000+	$650,000+

 

Actual numbers vary by office, region, and individual performance. Both firms also offer signing bonuses of $5,000 to $30,000 for full-time offers, depending on level and market.

 

How Do They Compare on Culture and Work-Life Balance?

 

EY-Parthenon's culture is intense, especially in the PE-focused groups. Monitor Deloitte's culture varies by office but is generally less burnout-heavy.

 

The Glassdoor overall ratings tell part of the story. EY-Parthenon scores 3.9 out of 5 on Glassdoor as of early 2026, while Deloitte scores 4.0 out of 5. Compensation and benefits ratings are similar across both firms.

 

Work-life balance is where the two firms diverge most clearly. EY-Parthenon's PE work involves tight deadlines, often two-week sprints with very long hours. Monitor Deloitte's strategy work tends to follow a more measured 6 to 12 week project cadence, though late nights still happen.

 

In my experience coaching candidates from both firms, EY-Parthenon consultants average 55 to 70 hours per week, while Monitor Deloitte consultants average 50 to 60 hours per week. PE-staffed weeks at EY-Parthenon can push past 70 hours.

 

How Do They Compare on Exit Opportunities?

 

Both firms offer strong exit opportunities into industry, private equity, and corporate strategy roles. The flavor of the exits differs based on the work each firm does.

 

EY-Parthenon consultants exit most often into:

 

• Private equity firms (especially after strong CDD performance)

 

• Corporate development teams at Fortune 500 companies

 

• Strategy roles inside PE-owned portfolio companies

 

• MBB lateral hires (a meaningful share of EY-Parthenon laterals land at MBB)

 

Monitor Deloitte consultants exit most often into:

 

• Corporate strategy and corporate development roles

 

• Internal strategy teams at consumer, healthcare, and tech firms

 

• Startups in operations and strategy roles

 

• MBB lateral hires (slightly fewer than EY-Parthenon, since less PE exposure)

 

For candidates whose ultimate goal is private equity or transactions, EY-Parthenon offers a clearer path. For candidates targeting general corporate strategy or growth-stage operating roles, Monitor Deloitte offers more variety.

 

How Do the Interview Processes Compare?

 

Both firms use candidate-led case interviews, behavioral questions, and group exercises. The structure is similar but the timing and assessment formats differ.

 

Here is a side-by-side comparison of the interview process at each firm:

 

Stage	EY-Parthenon	Monitor Deloitte
Application screening	Resume and cover letter	Resume and academic credentials
Online assessments	Sometimes (varies by office)	Yes (Immersive Online Assessment plus Job Simulation)
First round interviews	2 interviews (1 case, 1 fit)	1 to 2 case interviews plus 1 behavioral
Final round interviews	3 interviews (case, group case, fit)	2 to 3 interviews (case, group case, behavioral)
Written case	Sometimes	Yes, often used
Group case interview	Yes (final round)	Yes (final round)
Total process duration	2 to 12 weeks	4 to 8 weeks
Reported acceptance rate	Roughly 2% to 3%	Roughly 3% to 4%

 

What Is the EY-Parthenon Interview Process?

 

EY-Parthenon typically has two to three rounds of interviews. The first round is usually a recruiter phone screen focused on fit. The second round adds a 30-minute case interview alongside a behavioral interview.

 

The final round adds a group case interview and a partner-level behavioral. The full process can take anywhere from two to twelve weeks depending on the office, role, and hiring timeline.

 

The EY-Parthenon case interview is candidate-led, meaning you drive the structure, propose what to analyze, and ask for data. The case types you will see are heavily weighted toward private equity, market entry, profitability, and M&A.

 

In my experience interviewing candidates at Bain, the candidate-led case format requires more practice than McKinsey's interviewer-led style. You need to be comfortable taking the lead without prompts and to keep driving the case forward even when you do not have all the data.

 

EY-Parthenon's final round group case interview is also distinctive. You will be placed in a group of 3 to 5 candidates and given materials to analyze together. The interviewer observes silently for one hour, then your group presents for 15 minutes and answers Q&A.

 

What Is the Monitor Deloitte Interview Process?

 

Monitor Deloitte's interview process is more structured and assessment-heavy. Early career candidates typically face four stages: online application, immersive online assessment, job simulation, and final stage assessment. The process takes four to eight weeks.

 

Experienced hires skip the online assessments and move straight into interviews. The process is shorter (three to six weeks) and includes two to three case interviews plus a final round group case.

 

Monitor Deloitte's standout interview format is the written case interview. You receive a packet of materials with 10 to 15 slides of data, then prepare independently for 30 to 50 minutes before presenting to a Director or Partner. The written case tests how you process information under time pressure.

 

The broader Deloitte case interview process overlaps heavily with Monitor Deloitte's, but Monitor Deloitte places more weight on strategy thinking than broader Deloitte Consulting interviews do. The case difficulty is closer to BCG or Bain than to standard Big 4 implementation interviews.

 

Which Firm Is Right for You?

 

The right answer depends on what you want from your consulting career. Both firms are excellent and accept fewer than 4% of applicants. The choice comes down to work style, brand priority, and exit goals.

 

When Should You Choose EY-Parthenon?

 

Choose EY-Parthenon if you want to do private equity work, transactions, and pure strategy. EY-Parthenon offers more deal exposure than almost any other firm outside MBB. Its CDD pipeline is one of the largest in the industry.

 

You should also choose EY-Parthenon if:

 

• You want a strong strategy-specific brand on your resume

 

• You eventually want to move into private equity or corporate development

 

• You are based outside the U.S. where the Parthenon brand is well known

 

• You can handle high work intensity and tight deal timelines

 

• You want broader global mobility through EY's 150+ country footprint

 

When Should You Choose Monitor Deloitte?

 

Choose Monitor Deloitte if you want classic corporate strategy work and a broader Big 4 platform. Monitor Deloitte's strategy work covers market entry, growth, and innovation, which is closer to the work MBB does.

 

You should also choose Monitor Deloitte if:

 

• You want varied strategy work, not just due diligence

 

• You value the broader Deloitte brand and exit network

 

• You want more reasonable work-life balance

 

• You want access to the Doblin innovation practice (especially in Chicago)

 

• You eventually want to move into corporate strategy or general industry roles

 

How Should You Prepare for the EY-Parthenon or Monitor Deloitte Interview?

 

The prep is largely the same for both firms because the case formats overlap. Both firms test structured thinking, hypothesis-driven analysis, business judgment, and clear communication. Both expect you to drive the case.

 

Here is a five-step prep plan that works for both firms:

 

1. Build foundational case skills. Master the basics of case structure, math, brainstorming, and synthesizing recommendations. This typically takes 40 to 60 hours.
   
   
2. Learn how to build tailored case interview frameworks. Memorized frameworks do not work. You need to build a unique structure for each case based on the specific business problem.
   
   
3. Practice 30 to 50 live cases. Solo case practice has limited value. Find practice partners who can play the role of the interviewer and challenge you with follow-up questions.
   
   
4. Master the firm-specific formats. For EY-Parthenon, focus on PE-style commercial due diligence cases. For Monitor Deloitte, prepare for written cases and group case interviews.
   
   
5. Polish your behavioral stories. Both firms test "Why this firm?" heavily. Have specific, well-rehearsed reasons that go beyond generic prestige answers.

 

Case interviews are the highest hurdle at both firms. If you want to learn case interviews quickly, my case interview course walks you through proven strategies in as little as 7 days.

 

What Are the Top Tips for Acing the EY-Parthenon or Monitor Deloitte Interview?

 

Here are six tips that consistently separate successful candidates from rejections at both firms.

 

Tip #1: Drive the Case Without Waiting for Prompts

 

Both firms use candidate-led case interviews. The biggest mistake candidates make is waiting for the interviewer to tell them what to do next. The interviewer is silently judging whether you can run the case on your own.

 

After every piece of analysis, propose the next step. State your hypothesis, explain what you would look at next, and ask for the data you need.

 

Tip #2: Show Commercial Common Sense

 

Both firms value business judgment over textbook frameworks. When you analyze data, lead with the business implication, not the analytical method. Interviewers do not care that you can calculate a market share.

 

They care that you can interpret what that share means for the client. Connect every number to a so-what statement before moving on.

 

Tip #3: Have Three Specific Reasons for Choosing This Firm

 

Both firms aggressively test fit. They want candidates who specifically want EY-Parthenon or Monitor Deloitte, not candidates who applied to every consulting firm. Prepare three specific reasons that connect your background to the firm's work.

 

Generic answers like "I want to be at a top strategy firm" will not work. Specific answers like "I want to do CDD work because I want to move into private equity later" will.

 

Tip #4: Prepare for the Group Case Interview

 

Both firms use a group case in the final round. The interviewer is observing how you work with other candidates, not how often you talk. Add value by structuring the discussion, building on other people's ideas, and steering the group toward a clear recommendation.

 

The group case interview has its own set of skills that differ from individual cases. Practice in groups of three to five before your final round.

 

Tip #5: Practice Written Case Analysis if Targeting Monitor Deloitte

 

Monitor Deloitte's written case is often the differentiator. Most candidates fail it because they try to read every page in the data packet. Skim first, identify which slides answer which question, then dive deep only on the slides that matter.

 

Practice timed written case exercises before your interview. The format is not something you can fake on the day.

 

Tip #6: Lead With a Recommendation in Every Answer

 

Both firms train consultants to deliver the answer first when speaking to clients. Show that you already think this way. When you answer a case question, lead with your conclusion in one sentence, then explain your reasoning.

 

Do not narrate your thought process step by step. State the so-what, then back it up.

 

Frequently Asked Questions

 

Which is better, EY-Parthenon or Monitor Deloitte?

 

EY-Parthenon has a stronger pure strategy brand and more private equity exposure. Monitor Deloitte offers broader corporate strategy work and better work-life balance. Neither is universally better. The right choice depends on your career goals.

 

Is EY-Parthenon better than Deloitte Consulting?

 

Yes, EY-Parthenon is considered more prestigious than the broader Deloitte Consulting practice. However, Monitor Deloitte (Deloitte's strategy arm) is roughly on par with EY-Parthenon. The fair comparison is EY-Parthenon vs Monitor Deloitte, not EY-Parthenon vs all of Deloitte.

 

Does EY-Parthenon pay more than Monitor Deloitte?

 

Salaries are very close at the entry and senior consultant levels. EY-Parthenon partners can earn more in strong M&A years due to PE deal flow. Monitor Deloitte partners benefit from more stable revenue across Deloitte's broader platform.

 

Which firm has the better exit opportunities?

 

EY-Parthenon has stronger private equity exits due to its CDD work. Monitor Deloitte has stronger corporate strategy and industry exits due to Deloitte's broader network. Both firms send a meaningful number of consultants laterally into MBB.

 

Are EY-Parthenon and Monitor Deloitte tier 2 firms?

 

Yes, both are widely considered tier 2 strategy consulting firms. They sit one notch below MBB and are roughly comparable to Strategy&, LEK, OC&C, and Roland Berger. Both compete directly with MBB on top strategy projects.

 

How hard is it to get into EY-Parthenon or Monitor Deloitte?

 

Both firms accept roughly 2% to 4% of applicants. The acceptance rate is similar to other top tier 2 firms and only slightly easier than MBB. The interview process is rigorous and includes multiple case interviews plus a group case.

 

Does Monitor Deloitte still exist as a separate brand?

 

The Monitor Deloitte brand is still actively used in Europe, Asia, and Latin America. In the United States, most former Monitor Deloitte consultants now sit inside Deloitte's broader Strategy and Analytics practice. The brand still appears on Deloitte's website and recruiting materials.

 

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