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NOAHHERTLEIN

Based in Northwest Arkansas

IT risk and assurance at EY

Hi, I’m Noah. I audit the code behind the numbers.

I’m on EY’s technology risk team in Bentonville, where I test the most complex application controls for a Fortune 1 retailer. Day to day, that means reading Java, Python and SQL, tracing data from source system to financial report, and writing it up so a reviewer can follow every step.

When the same work keeps coming back, I automate it. My AI-driven audit workflow is now used by more than 50 people on the engagement.

  • ITGC
  • SOX 404
  • Application controls
  • IPE testing
  • Java, Python, SQL
  • AI automation
CurrentlyTesting app controls and studying for the CISA
Application controls tested

100+

The engagement's most complex, custom-built and financially material ones.

ITGC workpapers

50+

Documented from walkthrough to conclusion, ready for review.

Controls in the matrix I automated

250+

Tracked and kept current by the workflow I built.

Teammates using my workflows

50+

On one of the largest audit clients in the world.

Featured project

Audit automation workflow

An AI-driven workflow I designed to take the repetitive parts out of audit prep. It handles evidence intake, classifies controls, and gets walkthroughs ready before anyone opens a meeting invite.

  • Sorts incoming evidence as it arrives
  • Classifies controls ahead of walkthroughs
  • Keeps a 250+ control matrix current
  • Used by 50+ people on the engagement

Built for internal use, so the details stay confidential.

The result is more consistent documentation, faster turnaround, and conclusions that hold up in review.

Experience

Where I’ve done the work

tested mark
Tested
reconciled mark
Reconciled
traced mark
Traced to source
  1. IT Risk & Assurance Staff, Technology Risk

    July 2025 – present

    Ernst & Young (EY), Bentonville, AR

    The only onshore staff on the application-controls team for a Fortune 1 retail enterprise. I'm trusted with the controls that are custom-built, high-risk and material to the financials.

    • Tested: Test design and operating effectiveness of 100+ automated controls across inventory, order-management and financial-reporting systems, reading the source code and configuration (Java, Python, SQL) in SAP and custom platforms.
    • Traced to source: Confirm the exact production code version in scope before testing, so conclusions reflect what's actually deployed.
    • Reconciled: Trace data end to end through cloud data platforms, message queues, orchestration and relational databases to prove system reports (IPE) are complete and accurate, down to record counts and transaction detail.
    • Tested: Evaluate interface and error-handling controls (message validation, schema and total checks, monitoring and alerting) to confirm failed transactions get caught, retried and resolved.
    • Traced to source: Lead walkthroughs with developers and control owners, then write the narratives, IPE memos, benchmarking memos and PBC requests that turn technical logic into clear conclusions.
    • Reconciled: Spot and escalate evidence gaps and deficiencies, working with client IT, internal audit and offshore teams. I've served several clients at once, on teams from a few people to 50+.
  2. Technology Risk Intern

    June – August 2024

    Ernst & Young (EY), Bentonville, AR

    My first look at ITGC and application-controls work on a large enterprise engagement, the summer before senior year.

    • Tested: Supported control testing and walkthrough documentation alongside the ITGC and application-controls team.
    • Reconciled: Collected evidence, benchmarked prior-year controls, and tied system reports back to source data under senior review.
    • Traced to source: Earned a full-time return offer and joined the same engagement after graduating.

Toolkit

The systems I test, and what I test them with

  • SAP & ERP platforms

  • Application code review

  • Python

  • SQL & DB2

  • Cloud data platforms

  • Event streaming & queues

  • Workflow orchestration

  • Advanced Excel

  • AI workflow automation

Audit and risk

Before EY, and on the side

School, research and the AI club that got big

Working on IT risk, SOX or audit automation? Let’s talk.

Email is the fastest way to reach me. I’m also on LinkedIn, and my résumé is one click away.