BUILDING THE INTERNAL AUDIT
To establish an effective internal audit function, the building process moves across three strategic horizons: Governance Foundations, Execution Mechanics, and Continuous Optimization.
Building the Internal Audit Function
At a high-growth technology company, traditional "check-the-box" auditing fails. Growth-stage enterprises evolve too quickly for static checklists; processes change between the scoping phase and the final report. To remain effective, an internal auditor at a Series A through Series E company must embrace the Operator-Auditor Mindset.
When to Start
Knowing exactly when to transition from informal founder oversight to a structured internal audit function is critical. Implementing formal governance too early introduces restrictive bureaucracy that can stifle a startup’s agility. Waiting too long, however, can expose a scaling company to operational blind spots, regulatory penalties, or revenue leakage.
The Charter, the Audit Committee, and Independence
A common governance failure at growth-stage companies is placing Internal Audit ($IA$) directly under the Chief Financial Officer ($CFO$) or VP of Finance. On paper, this arrangement looks convenient—finance leaders understand numerical auditing, internal controls over financial reporting ($ICFR$), and spreadsheet metrics.
The First Hire
A common governance failure at growth-stage companies is placing Internal Audit ($IA$) directly under the Chief Financial Officer ($CFO$) or VP of Finance. On paper, this arrangement looks convenient—finance leaders understand numerical auditing, internal controls over financial reporting ($ICFR$), and spreadsheet metrics.
The Annual Risk Assessment
The annual audit plan is the most important artifact the IA function produces. It defines what the function will examine during the year, implicitly defines what it won't examine, and commits the function to specific engagements that will produce specific findings. Every other output — individual audit reports, findings, remediation tracking, audit committee reports — flows from the plan. A well-constructed plan is necessary but not sufficient for a successful function.
Audit Methodology
Audit methodology is the systematic approach by which engagements are planned, executed, and reported. Good methodology produces consistent quality across engagements and auditors. Bad methodology produces inconsistency and eventually failures of defensibility.
Auditing Revenue Operations
Across dozens of growth-stage IA engagements, one pattern recurs with remarkable consistency: the revenue operations audit is the highest-value first engagement an IA function can execute. Quantified impact typically ranges from $500K to $5M+ in annualized value identified, against engagement cost of $50K-$80K.
Auditing Product, Engineering
For growth-stage technology companies, the engineering function represents both the largest concentration of operational risk and the least commonly audited area. Code changes production systems that serve customers; deployment pipelines introduce new versions thousands of times per year at mature companies; engineers have privileged access to systems that process regulated data.
Auditing People Operations
People Operations, Procurement, and Vendor Management appear to be separate audit subjects. They have different owners (CHRO, CFO or Procurement lead, Procurement with Legal/Finance respectively), different systems, different risks, and different stakeholder groups. Yet they share enough structural characteristics that combining them into a single audit or closely sequenced audits often produces greater value than auditing each in isolation.
Auditing Data, Analytics
Over the past three years, data governance and AI governance have shifted from specialty concerns for regulated industries to mainstream audit subjects for virtually all growth-stage companies.......
Fraud Risk Assessment
Fraud is the category of risk where IA's independence, discipline, and methodology matter most. Other audit areas address process effectiveness; fraud audit addresses intentional wrongdoing. The stakes are higher: individuals face termination and potential prosecution; .....
Culture, Ethics
Ten years ago, the suggestion that IA could meaningfully audit culture would have been met with polite skepticism. Culture was considered qualitative, subjective, and outside audit's methodological reach. Today, culture audit is a legitimate and increasingly expected IA activity.....
Advisory Work
The traditional conception of internal audit focuses on assurance work: independent evaluation of controls, processes, and practices with findings delivered through audit reports. Assurance remains the foundation of the profession and the core of most IA mandates..........
Audit Technology
Internal audit practice has transformed over the past decade. The profession that relied on sampling, spreadsheets, and Word-document reports now increasingly uses continuous monitoring, full-population analytics, integrated platforms, and AI-assisted work............
Reporting, Tracking
Fourteen parts of this masterclass have covered the specific elements of building an internal audit function at a growth-stage company: what IA is and isn't; when to start and at what stage; charter, committee, and independence; the first hire; risk assessment and audit planning;........