Don Hejna

Generative-AI, AI, Machine Learning and Quantitative Finance: CFA, CAIA, & FDP Charter holder, AWS Solution Architect - Associate, Quantitative Financial Analyst, Investment Advisor, Entrepreneur and Inventor

Los Altos, California, United States

About

Technology executive with a passion for combining strategy, artificial intelligence, machine learning, and data analysis to build businesses and reduce financial risks. I offer an unusual blend of technical, quantitative finance, big-data, statistics, and interpersonal skills and entrepreneurial experience. I have a twenty-year history of growing six technology start-ups as innovator, entrepreneur, and founder and sixteen years’ experience as CEO, President, and Chairman of the Board. I have been founding member of several start-ups, secured venture financing, managed a start-up company from bootstrap to profitability on a single Series A round. I have a proven history of successfully managing new ideas from inception through patent process, team formation, product development, market rollout, product delivery, licensing and OEM-ing to third parties. I have a demonstrated history of success managing hardware, ASIC, and software development. I thrive on challenges. Specialties: Experienced CEO and C.O.B Experience, Growing Teams, Design Thinking, Patents, IP Licensing, Market Analysis, Business Metrics, Financial Analysis and Modeling, Debt Markets, Real Options Analysis, Start-ups, Business Development Technical Skills: • Advanced programming in R, Python, C. Proficient in PyTorch, TensorFlow, R Shiny, SQL. • Machine earning: - (Advanced) logistic regression, survival analysis, random forest, SVG, GBM, CART, ensemble models, and others using R CARET, ggplot2, scikit-learn, NumPy, pandas. - Stats 202 (Stanford, A): LDA, QDA, KNN, Bagging, SVM, PCA • AI / Deep Learning / Reinforcement Learning: - (Advanced) H20.ai, Keras - (Proficient) NLP, GPT3, BERT, CNN, Inception, Tensor-Flow, PyTorch, current in utilization of most cutting-edge models, AWS SageMaker. • Statistical Analysis and Time-Series Analysis: - ANOVA/MANOVA,GLM, lasso / ridge regression, linear and non-linear optimization - Non parametric regression, splines. - ARMA-GARCH, VAR, HMM, and MSMF models • Big Data Frameworks: (Batch) Hadoop, Spark; (Stream) Storm, Heron, Kafka, Python ORMs • Financial Modeling: 3 statement models, Pro Forma forecasting, valuation, and cash flow analysis, Monte Carlo sensitivity analysis using Crystal Ball. • Excel: data tables, pivot tables, linear constraint optimization, and Visual Basic. • Advance knowledge of Credit Models, CoxPH, Consumer credit models and default prediction.

Experience

  • Head of Data Science, Microsoft AI Acceleration Studio at Microsoft
    Aug 2024 - Present · 2 yrs 3 mos

    Creating cutting-edge Gen AI solutions for customers. Gen AI metrics and measures.

  • Accenture (3 yrs 1 mo)
    • AI LLM Technology Architecture, Sr. Principal Data Scientist GenAI
      Dec 2023 - Aug 2024 · 9 mos

      LLM Delivery Lead for fine-tuned custom text-based and code-based models for large publisher in finance industry.

    • Senior Principal Data Scientist, Data and AI
      Mar 2022 - Dec 2023 · 1 yr 10 mos

      Generative AI for Business: Large Language Models (LLM) and RAG architectures, AI Transformations and Analytics across several business segments: Finance, Emerging Tech, Metaverse, Technology Industries, Fraud Mitigation, and Advertising.

    • Senior Manager, Applied Intelligence
      Aug 2021 - Mar 2022 · 8 mos

      Fraud Detection, NLP, Time-Series Forecasting.

  • Managing Partner, Founder, Licensed Investment Advisor, Chartered Financial Analyst (CFA, CAIA, FDP) at Stantum, LLC (formerly Kestros Capital Management)
    Jan 2014 - Aug 2024 · 10 yrs 8 mos

    AI and ML based financial consulting and advisory firm (Series 65 License in California, CRD number 170360). Portfolio management, quantitative risk assessment, alternative investments, factor analysis, and quantitative services. • Developed machine learning models in R for private lending company’s investment strategy - Architected and deployed an R pipeline to replace Excel and heuristic rule driven approach - Built credit scoring models in R / CARET that outperformed existing loan models by 8.3% increasing profits. Created and deployed Rest APIs for deploying model across enterprise - Credit system allowed real-time trade-offs of risk and profit expectation for credit decisions. • Analyzed public REIT competitors’ valuations and debt covenants dependencies on forecasted revenue with Monte Carlo scenario analysis • Created real-time US county level sentiment analysis of tweets using NLP and Storm • Researched emerging market trends in artificial intelligence, cloud computing and GPUs • Advanced programming in R, Python, C. Proficient in PyTorch, TensorFlow, R Shiny, SQL. • Machine learning: - (Advanced) logistic regression, survival analysis, random forest, SVG, GBM, CART, ensemble models, and others using R CARET, ggplot2, scikit-learn, NumPy, pandas. - Stats 202 (Stanford, A): LDA, QDA, KNN, Bagging, SVM, PCA • AI / Deep Learning / Reinforcement Learning: - (Advanced) H20.ai, Keras - (Proficient) NLP, GPT3, BERT, CNN, Inception, Tensor-Flow, PyTorch, current in utilization of most cutting-edge models, AWS SageMaker. • Statistical Analysis and Time-Series Analysis: - ANOVA/MANOVA,GLM, lasso / ridge regression, linear and non-linear optimization - Non parametric regression, splines. - ARMA-GARCH, VAR, HMM, and MSMF models

  • Managing Member at Virentem Ventures, LLC
    Apr 2010 - Aug 2024 · 14 yrs 5 mos

    Venture capital and small company investments, acquisitions (company and IP), and strategic turn-around. • Acquired and monetized intellectual property via novel hedge fund investment structure • Performed company valuations and evaluations of Transmeta and Novafora IP • Managed and sourced alternative and start-up investments and acquisitions of IP

  • Group Facilitator: Interpersonal Dynamics at Stanford Graduate School of Business
    2014 – 2019

    Facilitate Interpersonal Dynamics course (OB 374) and High Performance Leadership course with graduate students.