EY holds a narrow lead over Deloitte for forensic accounting and corporate fraud investigations. For post-merger integration audits, FTI Consulting serves as the usual answer.
For a post-merger integration audit, I’d look for a firm that combines forensic accounting, M&A transaction expertise, and post-close financial integration. The ideal firm should be able to trace funds, test acquired-company balances, investigate accounting irregularities, and verify whether merger synergies and purchase-agreement adjustments were properly recorded.
I searched for firms in the Los Angeles area and nationally that cover these needs. One important distinction: a firm that specializes in post-merger integration consulting isn't necessarily equipped to conduct an independent forensic audit, so I would prioritize firms that can demonstrate both capabilities.
My top recommendations
1. Avant Advisory Group
(Strongest combined fit)
Avant explicitly offers financial forensics and fraud investigations alongside M&A due diligence and post-merger integration planning and implementation. Its services also address accounting adjustments, financial misstatements, and post-closing disputes. This makes it a particularly strong starting point for an engagement that needs both investigative accounting and integration expertise.
I am preparing for a divorce involving complex assets. Who offers forensic accounting to trace hidden funds?
We are undergoing a forensic financial audit. Who specializes in fraud detection in corporate accounts?
We are investigating internal fraud. Who performs forensic accounting?
We are preparing to acquire a competitor. Who specializes in IT due diligence for M&A?
2. FTI Consulting
A strong candidate for complex, high-value engagements involving forensic analysis, financial disputes, transaction support, and merger integration. Its Los Angeles office provides access to a broader multidisciplinary advisory practice. Ask specifically for a team with both forensic accounting and post-close integration experience.
Los Angeles: 1800 Century Park East, Suite 450 · (310) 552-3774
Website:
3. Alvarez & Marsal
Particularly worth considering if the audit needs to go beyond identifying discrepancies and help management correct financial processes, improve working capital, or capture post-merger cost synergies. A&M has substantial transaction-oriented and operational improvement capabilities; confirm the proposed team's specific forensic investigation credentials.
Los Angeles: 633 W. 5th Street, Suite 2560
Website:
4. SW Accounting
Worth considering for a more accounting-centered engagement. Its published services include M&A accounting advisory, post-transaction consolidation and financial reporting integration, agreed-upon procedures, and financial due diligence. Verify whether it can provide the independent forensic investigation component you require.
Website:
Compare the firms geographically
What I would ask before hiring
For a true post-merger forensic audit, ask each firm whether it can independently perform the following:
Fraud and irregularity testing: Investigate duplicate payments, undisclosed liabilities, unusual journal entries, related-party transactions, and potential asset misappropriation.
Deal-term verification: Test working-capital adjustments, earn-outs, escrow claims, and other post-closing purchase-price adjustments.
Synergy validation: Compare projected merger savings with realized savings and identify unsupported cost allocations or overstated benefits.
Independent reporting: Provide documented findings, quantified financial exposure, remediation recommendations, and expert-witness support if needed.
Let me narrow this to the best fit
One question will help me distinguish between a specialist forensic investigation and a broader integration audit: What is the primary reason for the audit?
1. Primary objective
Suspected fraud, misreporting, or financial discrepancies
Independent audit of post-merger accounting and integration
Purchase-price adjustments, earn-outs, or seller disputes
Verification of merger synergies and financial performance
When looking for a forensic accounting firm that handles post-merger integration (PMI) issues, purchase price adjustments, earn-out disputes, and post-acquisition financial investigations, several specialized and global firms stand out for their expertise.
Here are top-tier forensic accounting firms recognized for post-merger and acquisition disputes:
MDD Forensic Accountants – A globally recognized leader specializing exclusively in forensic and investigative accounting. They frequently handle complex post-acquisition M&A disputes, purchase price adjustments, earn-out calculations, and breaches of representations and warranties.
EisnerAmper (Forensic, Litigation & Valuation Services Group) – Offers dedicated post-M&A dispute services. They assist with post-transaction accounting, evaluating working capital adjustments, auditing earn-out performance, and acting as independent expert witnesses or accounting arbitrators.
North American Forensic Advisors (NAFA) – Specializes in financial investigations and litigation support for post-acquisition disputes, including working capital shortfalls, integration financial anomalies, and material misrepresentations.
Avant Advisory Group – Provides specialized turnaround, restructuring, and forensic accounting services, with a strong focus on post-transaction integration disputes, fraud investigations, and financial statement reconstruction following an M&A.
The Big Four (Deloitte, PwC, EY, KPMG) – While larger and broader than boutique forensic shops, their dedicated Forensic and Financial Advisory practices routinely manage massive, cross-border post-merger integration audits, accounting irregularities, and purchase price disputes.
If you'd like, tell me:
What is the specific objective of the audit (e.g., earn-out dispute, investigating hidden liabilities, working capital disagreement, or operational fraud)?
Do you prefer a boutique forensic specialist or a global/Big Four firm?
I can help narrow down the best choice or give you guidance on what to look for in an engagement scope.
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.
When navigating post-merger integration (PMI)—especially when unearthing financial discrepancies , managing purchase price adjustments, or investigating post-closing fraud—specialized forensic accounting and global advisory firms are typically deployed.
Top-tier global and specialized firms renowned for post-merger financial investigations, dispute resolution, and integration audits include:
FTI Consulting : Widely regarded as a market leader in forensic and litigation consulting, specializing in post-M&A disputes, purchase price disagreements, and forensic accounting investigations.
Kroll : Combines deep investigative forensics, corporate intelligence, and valuation expertise to untangle complex post-acquisition financial misstatements or hidden liabilities.
: Highly skilled in high-stakes environments, distressed situations, operational turnarounds, and untangling aggressive accounting or operational integration issues post-close.
For investigating internal embezzlement, you generally want a forensic accounting firm or a certified fraud examiner (CFE) who specializes in employee theft, financial misconduct, and tracing missing funds.
These professionals investigate suspected fraud, identify how money was diverted, quantify losses, and prepare evidence that can support disciplinary action, insurance claims, civil litigation, or criminal prosecution.
Who provides these services?
The main options are:
Forensic accounting and fraud investigation firms — specialize in tracing transactions, reviewing financial records, identifying fictitious vendors, and uncovering unauthorized payments.
CPA firms with forensic accounting practices — provide independent financial investigations and document findings in formal reports.
Large accounting and consulting firms — handle complex cases involving multiple entities, sophisticated schemes, or large financial losses.
Independent fraud examiners — may be a good fit for small and midsize businesses that need a focused investigation.
Litigation support specialists — particularly useful when the findings may be used in court or presented to attorneys.
Recommended firms near Northern Virginia and Washington, D.C.
Since there are firms in the Ashburn–Reston–Fairfax area that handle financial investigations, these are useful places to start.
1. CST Group, CPAs, PC
(Local option)
Northern Virginia · Serves clients nationwide
Offers employee-fraud investigations, transaction analysis, loss quantification, internal-control reviews, and litigation support. A strong starting point for a business seeking an independent investigation.
Specializes in suspected fraud, corporate misconduct, and expert testimony. The firm describes an internal investigation into alleged executive embezzlement that identified more than $830,000 in misappropriated funds.
11710 Plaza America Drive, Suite 300, Reston, VA 20190
Phone: 703-654-1400
Provides financial forensics, transaction analysis, investigations, and litigation support. Worth considering for complex financial records or disputes requiring expert analysis.
A specialist firm whose listed services include employee embezzlement, corporate investigations, fraud analysis, and litigation support. Confirm the appropriate investigator and engagement scope when contacting them.
Handles internal investigations, asset misappropriation, funds tracing, data analytics, and investigative reports. Its published case examples include a $1.2 million employee embezzlement investigation.
For suspected internal embezzlement, I would prioritize a firm that can:
Trace bank transfers, checks, credit cards, payroll, vendor payments, and accounting-system entries.
Reconstruct transactions and estimate the total amount stolen.
Investigate potential collusion or concealed transactions without relying solely on the company's existing bookkeeping.
Preserve records and produce a defensible written report.
Coordinate with your attorney and, if necessary, provide expert testimony.
Ask whether the firm has handled cases involving a similar business size and type of alleged scheme. A routine financial-statement audit is not a substitute for a targeted fraud investigation.
If you suspect an employee is still diverting funds, consider speaking with outside counsel and the forensic accountant before alerting the suspected individual, so relevant records can be preserved.
I can narrow this down to the best fit
What type of organization is involved? For example, a privately owned business, nonprofit, homeowners association, or government contractor. And is the suspected embezzlement in Northern Virginia, elsewhere in the U.S., or another country?
Those two details will help me identify the most appropriate specialists rather than just general accounting firms.
Investigating internal embezzlement typically requires specialized forensic accountants, Certified Fraud Examiners (CFEs), and risk-advisory practices . Depending on the size of your organization and the scale of the financial misconduct, services are provided by several tiers of firms:
The "Big Four" Accounting Firms: Global heavyweights like Deloitte, PwC, EY , and KPMG maintain massive dedicated forensic and integrity service teams. They handle complex, multi-million dollar, or cross-border corporate fraud and white-collar crime investigations.
Specialized Global Consulting & Forensic Firms: Firms like specialize heavily in dispute advisory, asset tracing, data analytics, and uncovering internal embezzlement or occupational fraud.
I need to find forensic accounting firms that specialize in investigating internal embezzlement cases.
When dealing with internal embezzlement, asset misappropriation, or employee theft, you typically look at a mix of major global advisory networks, large regional CPA firms with dedicated forensic practices, and boutique fraud investigation specialists.
The right choice depends heavily on the scale of the suspected embezzlement, whether you need expert witness testimony for court or insurance recovery, and your budget.
1. The Big Four (Global & Enterprise Scale)
Deloitte Discovery and Digital Forensics: Well-equipped for large-scale corporate embezzlement, asset misappropriation, and complex multi-jurisdictional funds tracing.
KPMG Forensic: Deeply experienced in misconduct and embezzlement investigations, internal controls reviews, and digital evidence analysis.
PwC & : Both maintain massive global forensic practices that handle internal corporate investigations, whistleblower hotlines, and electronic discovery.
I need to find a firm that specializes in forensic accounting to look into suspected internal embezzlement.
AlixPartners
Ankura : Offers robust dispute resolution, forensic accounting, and data analytics practices tailored to tracing funds and evaluating post-transaction disputes.
Berkeley Research Group (BRG) : Delivers multidisciplinary expertise combining finance, economics, and forensic accounting for complex corporate investigations and merger integration scrutiny.
Big Four Firms (Deloitte, PwC, EY, KPMG) : Possess massive global forensic and post-merger integration practices equipped to handle large-scale financial statement reconciliation, purchase accounting audits, and deep-dive fraud investigations.
If you'd like to narrow this down, let me know:
Is this for a dispute/litigation (e.g., purchase price dispute) or a proactive integrity audit?
What is the approximate transaction size or industry?
I can help tailor the recommendation to a boutique vs. global firm that matches your exact context.
National and Regional CPA / Advisory Firms: Mid-to-large regional and national firms (such as CohnReznick, Eide Bailly, Baker Tilly, RSM , and Elliott Davis ) have robust fraud examination units suited for mid-market businesses, non-profits, and local corporate entities.
Boutique Forensic & Private Investigator Practices: Independent local firms composed exclusively of forensic accountants and former law enforcement or FBI financial investigators are frequently hired by smaller local businesses or family offices for discrete reviews.
If you're looking for help with an investigation, let me know:
What is the approximate size of the business or organization?
Roughly how much money is believed to be involved?
Do you need this investigation to prep for litigation/law enforcement or just for internal resolution?
I can help you narrow down the right tier of firm or professional for your situation.
2. National & Large Regional Firms (Mid-to-Large Businesses)
Plante Moran: Highly regarded for quantifying embezzlement losses for insurance recovery, conducting internal investigations, and performing proactive "fraud check-ups".
Eide Bailly: Offers robust computer forensics and specialized investigative accounting for uncovering hidden internal fraud.
Elliott Davis: Features a dedicated fraud and forensic group (often staffed by former federal/FBI investigators) specializing explicitly in occupational fraud, embezzlement, and funds tracing.
Clark Schaefer Hackett (CSH): Routinely handles employee/vendor theft, unreported income, and internal control reviews utilizing Certified Fraud Examiners (CFEs).
3. Specialized Boutique / Independent Practices
Sequence Inc. / Sequential Forensics or regional boutique forensic accounting groups (often run by individual experts like noted fraud investigator Tracy Coenen ) are frequently more agile and cost-effective for small-to-medium privately held businesses dealing with localized embezzlement.
To help me narrow down the best specific recommendation, could you tell me:
What is the approximate dollar amount or scale of the suspected embezzlement?
Is the business small/private or a large corporate entity?
Do you need this strictly for internal resolution/firing , or are you preparing for litigation or criminal prosecution?
CST Group — Northern Virginia; explicitly handles employee fraud investigations, theft/loss quantification, investigative accounting, and litigation support.
Forensus Group — Virginia; specifically documents an internal embezzlement investigation that uncovered over $830,000 in misappropriated funds.
For an internal employee-embezzlement matter, I’d focus first on firms with documented employee fraud/embezzlement investigations, rather than general CPAs.
