Mark S.

Senior Applied ML Engineer | Statistical Modeling, AI, and High-Stakes Decision Systems

London, England, United Kingdom

About

I build production decision systems combining statistical modeling, machine learning, and large language models to operate in noisy, adversarial, real-time environments.

Experience

  • Founder at Cohortly Ltd
    2026 - Present · 6 mos

  • AI Engineer (8 month contract) at Copper River Cyber Solutions
    Nov 2024 - Jun 2025 · 8 mos

    Design, document, and optimize an enterprise chatbot for knowledge management. Develop a metadata dashboard to monitor performance and usage trends. Perform adversarial testing to evaluate and mitigate security risks in chatbot interactions. Integrate Splunk telemetry to collect operational logs, user interaction metadata, and model drift indicators for centralized monitoring and anomaly detection. Publish a monthly bulletin summarizing AI system performance, usage anomalies, and applied mitigations.

  • Sr. Data Scientist at Collectors
    Jun 2021 - May 2024 · 3 yrs

  • Noblis (4 yrs 3 mos)
    • Team Lead Quant. Modeling
      Feb 2019 - Jul 2021 · 2 yrs 6 mos

    • Data Scientist/ Developer
      May 2017 - Jul 2021 · 4 yrs 3 mos

  • Model Validation Analyst at Wintrust Financial Corporation
    Sep 2015 - Aug 2016 · 1 yr