Post-merger integration audit in Fraud Investigation & Forensic Accounting | Parse

Yes. For post-merger integration (PMI), you’ll generally want a forensic accounting team that can do more than traditional audits: they should be able to investigate irregularities, validate acquired-company financials, review purchase accounting/working capital issues, harmonize controls, and support disputes or remediation after closing. Here are firms with relevant M&A forensic and integration capabilities:

Firm	Why it may fit post-merger integration work
Ernst & Young LLP	Its Transaction Forensics practice works across the M&A lifecycle, including post-transaction risk reviews, financial disputes, forensic diligence, fraud investigations, and purchase agreement-related accounting issues.
Nardello & Co.	Focuses on financial investigations, forensic accounting, fraud/control risk assessments, and pre- and post-M&A financial risk due diligence.
Berkeley Research Group	Has forensic accounting professionals experienced with investigations, internal controls, M&A advisory matters, and post-acquisition due diligence.
WilliamsMarston	Provides M&A accounting advisory services including financial due diligence, purchase accounting, internal controls, reporting, and post-merger integration support.
North American Forensic Advisors	Offers transaction due diligence, post-acquisition dispute analysis, review of financial statements, and forensic accounting support; it has offices including Miami.
KPMG LLP	Its M&A dispute advisory services address post-transaction accounting issues such as closing statements, purchase price adjustments, earn-outs, and financial disputes.
Weaver	Provides forensic accounting and transaction advisory support for acquisition-related disputes, financial statement issues, working capital adjustments, and purchase price matters.
Braverman Financial Advisory	Boutique option focused on forensic accounting, financial investigations, M&A due diligence, and purchase-price/earn-out disputes.

If you are specifically looking for PMI support (not just investigations)

Prioritize firms that can help with:

Day-1 / first-100-days finance integration
Consolidation of general ledgers and charts of accounts
Internal control alignment (SOX or non-SOX environments)
ERP/accounting-system integration reviews
Purchase accounting validation
Quality-of-earnings follow-up
Detection of revenue recognition, expense, payroll, or asset misstatement issues
Post-close working-capital and earn-out disputes

For a Miami-based company, I would also consider firms with Florida presence, such as North American Forensic Advisors (Miami office) and Florida-based forensic specialists, depending on whether the need is investigative, integration-focused, or litigation-related.

If you share the deal size (e.g., <$50M, $50M–$500M, enterprise), industry, and whether this is a buyer-side integration, seller-side review, or suspected financial irregularity, I can narrow this to a shorter shortlist.

Post-merger integration audit

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1. Avant Advisory Group

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2. FTI Consulting

3. Alvarez & Marsal

4. SW Accounting

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If you are specifically looking for PMI support (not just investigations)

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Which brands AI mentions

Recommendations by AI engine

Questions and answers

My top recommendations

1. Avant Advisory Group

Other topics in Fraud Investigation & Forensic Accounting

See where your brand stands in this ranking

2. FTI Consulting

3. Alvarez & Marsal

4. SW Accounting

Compare the firms geographically

What I would ask before hiring

Let me narrow this to the best fit

Sources cited in this answer7

Sources cited in this answer4

If you are specifically looking for PMI support (not just investigations)

Sources cited in this answer8

Sources cited in this answer1