Marcum Internship 2027–2028: Programs, Deadlines & How to Apply

Last updated: September 2026

Marcum was the 13th-largest US accounting firm before its $2.3 billion acquisition by CBIZ in November 2024. The combined entity is now the 7th-largest US accounting services provider with approximately $2.8 billion in revenue and 10,000+ team members across 135+ offices in 33+ states. Prior to the acquisition, Marcum earned Vault #11 Best Accounting Firm to Work For (2025) and maintained a 4.8/5 intern rating on Glassdoor from 8 intern reviews. The firm hired 101+ interns per year across assurance, tax, advisory, and managed accounting services, treating interns as full-time staff from day one. Post-merger, internship recruiting has transitioned to the CBIZ brand, but Marcum office locations, client base, and service lines remain, making "Marcum internship" searches still relevant for students targeting these roles.

Quick Facts

Post-CBIZ acquisition, Marcum internships now recruit through the CBIZ portal. Applications are expected September through November 2026 for Summer 2027, filling on a rolling basis with decisions in about 14 days. The 3.0 GPA floor and campus-first recruiting mean early engagement is critical.

Externships are short, remote professional experience programs where you finish a real project with a real company. The Yinan Zhao Investing & Financial Modeling Externship and the HP Tech Ventures Deal Sourcing & Startup Analysis Externship build exactly the financial modeling and analytical skills a Marcum/CBIZ application needs. Explore all Externships.

What Is a Marcum Internship?

A Marcum internship is a 6-to-12-week paid summer placement in public accounting, now operating under the CBIZ brand following the $2.3 billion acquisition completed in November 2024. Vault ranked Marcum #11 Best Accounting Firm to Work For in 2025, and the firm hired 101+ interns per year across assurance, tax, advisory, and managed accounting services. Intern reviews on Glassdoor rate the experience 4.8/5, describing hands-on client work, partner exposure, and a supportive learning environment. The combined CBIZ-Marcum entity now spans 135+ offices in 33+ states. While the Marcum brand is transitioning, the same offices, clients, and service lines continue, and students searching for "Marcum internship" should apply through the CBIZ student careers portal.

When Do Marcum Internship Applications Open for 2027–2028?

Marcum's internship follows a fall-to-spring recruiting cycle typical of mid-tier accounting firms, with a shorter lead time than Big 4. Prior cycles showed applications opening around September to November, approximately 10 to 12 months before the summer start. Glassdoor data shows the average time from application to decision is about 14 days, and 100% of intern interview reports on Glassdoor came through campus recruiting. Post-CBIZ acquisition, the brand and portal have shifted, but the geographic markets and recruiting cadence remain. The biggest variable for Summer 2027 is whether postings appear under the Marcum name, the CBIZ name, or both. Monitor both career sites starting September 2026.

How to read this page: our dates come from tracking previous recruiting cycles and daily posting data. Treat them as informed estimates based on historical patterns, not confirmed dates. The company's official careers page is always the most current source. If a role is posted there, go by that, even if this page suggests the window hasn't opened yet.

Why You Must Apply the Week Applications Open

Marcum's rolling admissions and 14-day decision cycle mean seats fill progressively from the moment postings go live. The CBIZ acquisition adds a layer of brand confusion: summer 2027 postings may appear under either name, and students who monitor both portals from day one will catch opportunities that single-portal watchers miss. Glassdoor shows 100% of intern applicants came through campus recruiting, so attending campus events is nearly mandatory. The 3.0 GPA floor makes Marcum/CBIZ more accessible than Big 4 firms, which means competition from within the eligible pool is fierce for desirable metro offices like New York, Philadelphia, and South Florida. Apply in the first week your target track and office appear, and lead with a clear answer to the interview question Glassdoor flags: "Why do you want to work for Marcum over a Big 4?"

Which Marcum Internship Programs Should You Target?

Marcum offered internships across its core service lines, now continuing under the CBIZ brand. Vault lists 101+ interns per year across five primary tracks:

Additional pipeline: the Summer Leadership Program is a 2-day experiential event for sophomore and junior students at select campuses, serving as an early-ID pipeline into internship offers. Monitor cbiz.com/careers for the full summer 2027 slate.

What Are the Eligibility Requirements?

Marcum/CBIZ internship eligibility is consistent across tracks based on Vault and Prosple listings:

• Enrollment: rising juniors and seniors pursuing a bachelor's or master's degree in accounting from an accredited institution.

• GPA: 3.0+ cumulative minimum per Vault. Competitive candidates typically sit in the 3.2–3.7 range. The 3.0 floor is lower than many Big 4 targets.

• Major: accounting or emphasis/minor in accounting for audit and tax tracks. Advisory roles may accept broader business, finance, or information systems degrees.

• Work authorization: US Citizen, US Permanent Resident, or valid US Student Visa. International students with valid student visas appear eligible, unlike many Big 4 firms that exclude CPT/OPT.

Is a 3.0 GPA Enough for Marcum/CBIZ?

Yes, 3.0 is a genuine minimum, not a soft screen. Vault's GPA range starts at 3.00, which is more accessible than Big 4 firms that typically set floors at 3.2 or 3.5. However, the lower bar means more candidates are eligible, so differentiation comes through campus recruiting engagement, technology skills, and a clear answer to "Why mid-tier over Big 4?" If your GPA is exactly 3.0, strong Excel proficiency, QuickBooks experience, and demonstrated initiative can compensate.

What Skills Does Marcum Look For, and How Do You Build Them?

Marcum sits at the intersection of traditional accounting services and mid-market advisory, and its intern hiring reflects that balance. Across available JDs and the Vault profile, the pattern is clear: Excel proficiency appears in every track, analytical and communication skills are universal requirements, and client-service orientation distinguishes the mid-tier firm culture from Big 4 process-driven environments. What does this tell you? Marcum hires people who can work directly with clients from day one, not just crunch numbers in the background.

How Is Demand for Mid-Tier Accounting Interns Moving Right Now?

Build These Skills Before You Apply

And every skill in the chart maps to a remote Externship where you finish a real company project before the window opens.

How close is the overlap? The Yinan Zhao deliverable covers financial modeling in the vocabulary Marcum's advisory and MAS tracks use daily, the HP Tech project builds the due diligence and analytical research skills Vault reviewers cite, and the Eric Ries strategy work trains the client communication every mid-tier firm demands.

What Is the Marcum Application and Interview Process Like?

Marcum's interview process is conversational and approachable, consistent with mid-tier accounting firm culture. Glassdoor rates intern interview difficulty at 2.8 out of 5 with 80% positive experience:

1. Check both career portals. Set up alerts at cbiz.com/careers/students-recent-graduates AND marcumllp.com/careers/students. Post-acquisition, postings may appear on either site.

2. Attend campus recruiting events. Glassdoor reports 100% of Marcum intern applicants came through campus recruiting. If CBIZ/Marcum recruits at your school, attend every event. The Summer Leadership Program is a 2-day early-ID pipeline for sophomores and juniors.

3. Apply online with your resume and any required materials. All tracks require a 3.0+ GPA. MAS requires QuickBooks familiarity. Prepare two to three examples of analytical work.

4. Interview Round 1: staff conversation. A casual discussion with two current staff members about your background, interests, and why public accounting. Glassdoor: 'Very casual, tries to make candidates comfortable.'

5. Interview Round 2: director or partner meeting. A 30-to-45-minute conversation with the director of your target department. Expect the key question: 'Why do you want to work for Marcum over a Big 4?' Have a genuine answer about partner exposure and hands-on experience.

6. Receive your offer. Average time from application to decision: ~14 days per Glassdoor. Rolling offers extended as decisions are made.

The interview is behavioral-focused with some light technical discussion for specialty tracks like AIG. Prepare STAR-format answers about teamwork, attention to detail, and client service. Our HireVue question guide with a free AI mock tool covers the same behavioral-question format.

What Students on Reddit Say

Marcum has an active presence in r/Accounting discussions, with threads covering the AIG practice, interview culture, compensation, and the post-CBIZ merger transition.

How Do You Stand Out at a Firm in the Middle of a $2.3 Billion Merger?

Three moves, all executable before fall 2026. First, understand the CBIZ-Marcum merger context. CBIZ acquired Marcum's non-attest business for $2.3 billion in November 2024, creating the 7th-largest US accounting services provider. The attest (audit) business went to Mayer Hoffman McCann P.C. Mentioning this intelligently shows you have done your homework beyond a generic "I want to work in accounting" answer. Second, prepare for the defining interview question: "Why do you want to work for Marcum over a Big 4?" The honest answer is partner exposure, hands-on client work from day one, and a culture where interns are treated as full-time staff. Vault reviews confirm this is true, not just marketing. Reference the 4.8/5 intern Glassdoor rating and the Vault #11 ranking to show you researched the program. Third, attend campus recruiting events. One hundred percent of Glassdoor intern applicants came through campus recruiting. If CBIZ or Marcum recruits at your school, that is your primary channel. If they do not, apply to the Summer Leadership Program as your back door.

What Other Companies Should You Consider?

Marcum/CBIZ competes for mid-tier accounting intern talent with a well-defined peer set of regional and national firms.

CBIZ itself has a published guide: see the CBIZ internship guide for the parent entity's program details. Our Big 4 & Top Accounting Internships 2027 guide maps the full landscape.

FAQ

Can I still apply for a Summer 2026 Marcum internship?

No. Summer 2026 recruiting has concluded, and those positions ran through CBIZ following the November 2024 acquisition. Target Summer 2027 by monitoring both the CBIZ student careers portal and any remaining Marcum postings starting in September 2026. Check cbiz.com/careers for the latest openings.

When do Marcum internship applications open for 2027?

Based on prior cycles, Marcum's summer internship applications typically open September through November, roughly 10 to 12 months before the start date. For Summer 2027, expect the window to open around September 2026, filling on a rolling basis through campus recruiting and online applications.

Are Marcum internship applications rolling?

Yes. Marcum has historically filled intern positions on a rolling basis, with decisions made in approximately 14 days from application per Glassdoor data. There is no single national deadline, so applying early in the window gives you the best chance at open seats in your preferred office.

What GPA do I need for a Marcum internship?

A 3.0 cumulative GPA is the minimum per Vault. Competitive candidates typically sit in the 3.2 to 3.7 range. The floor is lower than many Big 4 targets, making Marcum and CBIZ accessible to students who excel in other areas like leadership, technology skills, and relevant client-facing experience.

How hard is the Marcum internship interview?

Glassdoor rates the difficulty at 2.8 out of 5, with 80 percent of candidates reporting a positive experience. Expect two rounds: a conversation with staff members followed by a meeting with a department director or partner. Questions are mostly behavioral with some light technical discussion for specialty tracks.

Are Marcum internships paid, and how much?

Yes, they are paid. Glassdoor reports a median of about $28 per hour across 41 salary submissions, with a range from $23 to $33 per hour depending on service line and office location. Higher-cost metros like New York and Washington DC pay toward the top of the range at approximately $30 to $32 per hour.

Does the CBIZ acquisition affect Marcum internships?

Yes. CBIZ completed its $2.3 billion acquisition of Marcum in November 2024. Internship recruiting has transitioned to CBIZ branding, though Marcum's office locations, clients, and service lines remain. Apply through cbiz.com/careers and check for postings at former Marcum office locations for the most relevant opportunities.

Can a Marcum internship lead to a full-time job?

The program is designed as a pipeline to full-time employment. Vault describes strong conversion potential, and intern reviews confirm the experience gives a clear picture of what full-time roles look like. Mid-tier accounting firms typically convert 70 to 85 percent of interns, though Marcum's specific rate is not published.

Marcum's merger with CBIZ means a firm in transition, and transitions create opportunity for candidates who do their homework. Spend the runway building proof: a remote Externship turns interest in accounting into a finished project a fall 2026 application can point at.