John Lenz

John Lenz Email and Phone Number

Digital Category Analyst @ MilliporeSigma
Chelmsford, MA, US
John Lenz's Location
Chelmsford, Massachusetts, United States, United States
John Lenz's Contact Details

John Lenz personal email

n/a

John Lenz phone numbers

About John Lenz

It may surprise many of you reading this but my initial entry into data and technology was marked with failure not success. As a finance student, I struggled so much with my first programming exposure that I had to drop the class. Despite many others encouraging me to solely focus on finance, something told me that technical and programming skills would be important for my future. The next semester, I returned to the same Python course with renewed determination, investing 10x as much effort to grasp the fundamentals and successfully pass. I didn't know it at the time, but that decision paved the way for the rest of my journey and proved to be transformative.While working in finance, I continued to build up my technical skills further and take on increasing challenging technical projects- starting with basic automation script and eventually working my way up to increasingly complex data analysis and pipeline development. Each success bolstered my resolve to keep learning and exploring the fascinating world of data science and Machine Learning.In 2022, I make a decisive decision to leave my finance roots behind and jump head first into a technical roles, its a decisive that again proved transformative. Within 18 months, and a few setbacks along the way, I progressed from writing SQL queries to implementing AI and ML models from scratch processing millions of records. Meanwhile, my Python skills which were still developing when I made the initial transition have improved drastically, and I have become both proficient and efficient in implementation. Today, I work at the intersection of data science and ML, building AI-enable solutions that drive substantial business impact and value for one of the largest companies in the world.This year I made yet another big leap and I enrolled in the University of Texas Austin post-graduate program in Artificial Intelligence and Machine Learning and will be completing the program in February 2025. My experience has shown and proven to me that no matter the starting point, its possible to self-learn technical skills and complex ML concepts as long as you have the persistence to keep pushing forward when its hardest. I'm passionate about pushing the boundaries of Artificial Intelligence and Machine Learning while maintaining a focus on high impact and interpretability.

John Lenz's Current Company Details
MilliporeSigma

Milliporesigma

View
Digital Category Analyst
Chelmsford, MA, US
Website:
sigmaaldrich.com
Employees:
10417
John Lenz Work Experience Details
  • Milliporesigma
    Digital Category Analyst
    Milliporesigma
    Chelmsford, Ma, Us
  • Milliporesigma
    Product Data Scientist
    Milliporesigma Mar 2024 - Present
    Burlington, Ma, Us
    Data Processing and Analytics:• Worked with large scale datasets with ~1m+ rows minimum regularly• Devised controlled experiments to answer ambiguous and vague business questions regarding product/category analytics, and website traffic behaviors. Ensured results are unbiased, accurate, and actionable. • Leveraged a vast array of different statistical analysis techniques including sampling, hypothesis testing, A/B testing, and regression analysis to solve business challenges.• Built scalable data processing pipelines handling 1M+ daily records using cloud infrastructure (GCP Vertex AI)Machine Learning Implementations/Product Recommendation Engines:• Developed and implemented data-driven algorithms to increase co-purchase product recommendations in the complicated medical diagnostics segment. Implemented ML models using Google Cloud Vertex AI.• Utilized association rules and similar data science/ML algorithms to uncover high-quality and high-coverage rules for the Diagnostics life science portfolio, ensuring a balance of high-accuracy and interpretability in decision making.• Used ML-based mathematical optimization and hyper-parameter tuning to find the best balance between rules that covered the highest proportion of the portfolio vs rules that are the most actionable.
  • Fine Fettle
    Retail Business Intelligence Analyst (Position Eliminated)
    Fine Fettle Apr 2023 - Sep 2023
    Newington, Connecticut, Us
    • Developed ETL pipelines in Python bringing together data from multiple source systems using database connection libraries, Pandas, and NumPy for efficient large-scale data processing• Built automated reporting system leveraging MySQL, Python, and Tableau. Processed daily transactions across multiple business units and divisions.
  • Golden Hearts Games
    Business Data Analyst
    Golden Hearts Games Aug 2022 - Feb 2023
    Boston, Ma, Us
    -Saved company ~$30k/month by presenting data showing new customer retention strategy was not effective and was leading to lower-quality payer cohort without an improvement in conversion rates-Led data validation efforts in business model pivot, pinpointing and resolving multiple data quality issues between production, testing, and legacy systems-Mastered Google BigQuery and Data Studio for diverse business analytics needs
  • Columbia Care
    Financial Analyst (Fp&A)
    Columbia Care Nov 2020 - Aug 2022
    New York, Us
    -Produced monthly P&Ls and other relevant KPIs for market directors. Supported development of improved reporting infrastructure that reduced reporting time in half and resulted in more actionable information for leadership-Participated in monthly meetings between Operations, FP&A, and Senior management to better understand key drivers of current results and gain insight into likely future performance-Supported development of annual budgets and financial forecasts and variance analysis between budget and actual results. -Developed company-wide inventory model to better understand both company wide and individual market’s cost structure and to pinpoint areas that required operational efficiency improvements, saving ~$800k per year.
  • Nepc, Llc
    Performance Analyst/Investment Associate
    Nepc, Llc Sep 2019 - Jul 2020
    Boston, Massachusetts, Us
    • Built automated python ETL pipeline for investment holdings data integration with TIBCO Spotfire• Utilized Python to develop custom transformation logic and data cleaning strategies to handle missing values, poor formatting, and other common issues found in legacy systems.• Saved one hour per client per month of data processing/labor time scaling across 50+ clients.
  • Self-Employed
    Investment Professional
    Self-Employed Jan 2015 - May 2020
    -Actively wrote and developed research reports on individual companies, and managed my own portfolio for many years (2015-2020)-Investment Research Consultant (2016 and 2017)- Raymond James-Finalist in Boston CFA Society Institute Research Challenge (2018)-Passed CFA Level I Exam(~40% pass rate amongst industry professionals)- June 2018
  • Santander Bank, N.A.
    Credit Analyst Intern
    Santander Bank, N.A. Jun 2018 - Aug 2018
    Boston, Ma, Us
    -Analyzed financial statements, credit metrics, and operating profits to develop internal ratings which determined the size of credit extended-Assisted in the annual renewal process of 3 different corporate loans worth an estimated $100M dollars-Constructed cash flow projections of prospective borrowers, including stress testing of loan performance and covenant compliance-Assembled annual credit reviews and pitched to senior banking executives on the credit risk committe
  • Raymond James Financial, Inc.
    Investment Research Consultant
    Raymond James Financial, Inc. Jul 2016 - May 2017
    St. Petersburg, Florida, Us
    • Participated in weekly investment projects which were presented to the Senior Vice President of Investments• Gained a deeper understanding of the relationships between the three financial statements (Income statement, Balance Sheet, and Statement of Cash Flows); this knowledge was important to giving context to financial results
  • Raymond James Financial, Inc.
    Investment Research Intern
    Raymond James Financial, Inc. Feb 2016 - May 2016
    St. Petersburg, Florida, Us
    • Actively participated in weekly investment projects, and received increasing responsibilities and positive weekly feedback • Researched and assessed the relative strengths/weaknesses of various equity investment styles and strategies across market cycles• Analyzed multiple firms within the healthcare, technology, and financial sectors and delivered short 1-2 page investment summaries for each investment

John Lenz Skills

Bloomberg Terminal Equity Research Analysis Microsoft Office Time Management Critical Thinking Teamwork Research Microsoft Excel Stock Picking Microsoft Word Analytical Skills Powerpoint Factset Macroeconomic Analysis

John Lenz Education Details

  • Texas Mccombs School Of Business
    Texas Mccombs School Of Business
    Artificial Intelligence And Machine Learning
  • Southern New Hampshire University
    Southern New Hampshire University
    Computer Software Engineering
  • Bentley University
    Bentley University
    Finance
  • Western New England University
    Western New England University
    Economics Minor

Frequently Asked Questions about John Lenz

What company does John Lenz work for?

John Lenz works for Milliporesigma

What is John Lenz's role at the current company?

John Lenz's current role is Digital Category Analyst.

What is John Lenz's email address?

John Lenz's email address is jl****@****are.com

What is John Lenz's direct phone number?

John Lenz's direct phone number is +172736*****

What schools did John Lenz attend?

John Lenz attended Texas Mccombs School Of Business, Southern New Hampshire University, Bentley University, Western New England University.

What are some of John Lenz's interests?

John Lenz has interest in Children, Economic Empowerment, Civil Rights And Social Action, Politics, Human Rights.

What skills is John Lenz known for?

John Lenz has skills like Bloomberg Terminal, Equity Research Analysis, Microsoft Office, Time Management, Critical Thinking, Teamwork, Research, Microsoft Excel, Stock Picking, Microsoft Word, Analytical Skills, Powerpoint.

Who are John Lenz's colleagues?

John Lenz's colleagues are Alexander Dill, Mr Jit, Nicole Steinbach, Adriana Bodica, Connor Mccann, Michelle Overley, Cpim, Tanya Callaway, Mba.

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