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Dual degree MBA and MS IT with a Business Analytics Certification. Specific interest and expertise in getting analytics insights to inform business decisions & deliver value to the business through advanced analytics techniques with 10+ years of experience.Tools:• Data: SQL, Python, Spark, Hive* Visualization: Tableau, Python and othersMy data philosophy:When faced with complex problems, I dive in to understand the full scope of the problem as well as the environment across systems and stakeholders. I break the problem into smaller chunks that can be attacked independently (by me or others). My solutions have to be reproducible and modular to allow independent improvement and evolution. Finally, any solution has to have proper documentation so my work can be tested and challenged with full understanding of my approach. I take great pride on being transparent and learn from others when someone has learning to offer. Likewise, I enjoy mentoring other team members and creating a great culture for myself and people around me.Area of interest:While I consider my self a well rounded full stack data professional, my main focus and area of interest is ML. I don't believe ML is a solution for everything, but often time, I think outside the box to bring ML techniques into problems that have not been traditionally solved with ML. My super-power: Lifelong learner. Almost everything I do and know is a product of my continuous learning and preparation. I breathe data on any form. During my free time, I am often reading books, articles and researching interesting papers. I attend local meetups and research interesting conference that can make me a better professional. When there is something I don't know how to do or I think my solution is not elegant enough, I become a researcher to find out the best way to solve a problem.
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Director, Data And AnalyticsLennarWaltham, Ma, Us -
Sr Manager, Data ScienceLennar Nov 2024 - PresentMiami, Fl, Us -
Manager, Data ScienceLennar Dec 2023 - Nov 2024Miami, Fl, Us -
Sr Data ScientistLennar Mar 2022 - Dec 2023Miami, Fl, Us -
Senior Data EngineerPatagonia Aug 2021 - Mar 2022Ventura, California, Us -
Analytics Engineer, Principal (Ml Team)Tripadvisor Sep 2017 - Aug 2021Needham, Ma, UsFor everything below, I was either unique contributor to the project or main tech lead of the project.Was hired as lead and only analyst for the Hotels B2B Team with main focus in Ads Product. As lead analyst:• Created main data sources to understand and optimize the business• Adopted new tooling to enable effective and efficient consumption for all generated data• Created daily reporting system with proper SLAs to monitor the business• Worked cross-functionally with engineering, product, marketersOver time, my role has evolved and morphed to have greater scope and more analysts have joined the team which I have mentored / taught what I know. More recently:• Created hotels features through database daily aggregation to build models for the business• Used ML to create multiple models: Hotels Churn, Hotels Lead Scoring, Hotels Estimated MRR• Built pipeline with proper SLAs for all models to be scored daily and made sure models could effectively be used by the business• Worked on machine vision projects: Ranking photos by attractiveness, object detection on photos uploaded to the site and text extraction from imagesMore general projects:• Investigated and deployed pipeline to compute UTest on not-normally distributed KPIs for a vast set of testing.• Aggregated data for hotels, impressions for consumers.• Investigated data anomalies across the businessIn my day to day, I use a variety of tools: Hadoop ecosystem (HDFS, Hive, Spark, Presto), AWS (S3 and EC2) for scripting and ML: Python, Spark and for visualization: Python and Tableau. -
Analytics Manager, Data ScienceVistaprint Oct 2016 - Sep 2017Waltham, Ma, Us• Responsible for improving (model and technology) of Vistaprint main Recommendation Systems for site. • Research new methods and technologies that could be used to improve Vistaprint state of the art ML technologies.• Work across multiple functions to move forward and deliver on key Data Science projects.• Prioritizing work and connecting dots on multiple DS projects to create efficiencies.Regular used tools: Python, R, Spark, Hadoop, Hive, Tableau, AWS -
Analytics Manager, Customer AnalyticsVistaprint Jan 2015 - Oct 2016Waltham, Ma, Us• Created and managed streamline process for testing Marketing ideas that expands across all Vistaprint markets - globally• Created and reported insights of strategic segmentation to the business• Main contributor to Testing tool for analytics that expands across channels and locations• Managed a small team to deliver insights and results on key strategic initiatives • Used and piloted advance analytics toolRegular used tools: Tableau, R, Python, SQL, Hadoop, Hive, Microsoft tools -
Sr. Analyst (Crm Analytics)Vistaprint Nov 2013 - Jan 2015Waltham, Ma, Us -
Analytics AssociateDeloitte Jul 2012 - Nov 2013Worldwide, OoAssist clients and analyze their large and disparate data to support or refute the facts and allegations of commercial investigations and complex litigation. -
Data Analyst InternC-4 Analytics, Llc May 2011 - Aug 2011Wakefield, Massachusetts, Us• Managed Google Analytics & Google AdWords accounts for different clients to achieve higher ROI on their e-marketing efforts. • Developed and implemented statistical test base on raw data from Google Analytics which resulted on informed business decisions. • Created rules that allowed C-4 Analytics to simplify and optimize their client accounts.• Created and presented weekly reports to senior management and clients representatives using Acquisio. -
Development DirectorEntec Ca May 2007 - Sep 2009National Retailer Forklift Company with total assets of $4 million• Identified and resolved critical problems in every department by understanding different processes and centralizing communications between multiple departments which resulted in a 22% reduction in order fulfillment time.• Implemented a Data Management System to bridge all departments. Major documentation was collected and processes flowed smoothly.• Developed and designed a new website by creating an informational database of current products and employing a graphic designer; incremented E-mail quotes by 72% by managing a Google Adwords campaign.• Created a new system to fix products quickly for maintenance or warranty; customer satisfaction increased by 12%.Sales Representative • Found new clients in Caracas (Sales Zone). Number of customers increased by 30%, and total sales increased by 60%.• Increased company/client confidence by extending relations and offering personal assistance to customers.
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ResearcherMechanical Conversion Laboratory Sep 2007 - Jul 2008Thesis: Developed new software "Turbo X" to design Francis Turbine.
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Import AssistantReinex Ca Jul 2005 - Jun 2006Import Company with revenues of $4.5 Million and percentile grow of 12% per year• Imported goods for small and medium industries. • Learned processes of international trade.
Cesar Hernandez Skills
Cesar Hernandez Education Details
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Bentley University - Mccallum Graduate School Of BusinessBusiness Analytics -
Universidad Simón BolívarEngineering
Frequently Asked Questions about Cesar Hernandez
What company does Cesar Hernandez work for?
Cesar Hernandez works for Lennar
What is Cesar Hernandez's role at the current company?
Cesar Hernandez's current role is Director, Data and Analytics.
What is Cesar Hernandez's email address?
Cesar Hernandez's email address is ce****@****ail.com
What is Cesar Hernandez's direct phone number?
Cesar Hernandez's direct phone number is +317785*****
What schools did Cesar Hernandez attend?
Cesar Hernandez attended Bentley University - Mccallum Graduate School Of Business, Universidad Simón Bolívar.
What are some of Cesar Hernandez's interests?
Cesar Hernandez has interest in Civil Rights And Social Action, Politics, Business Analytic, Photography, Poverty Alleviation, Science And Technology, Business, Sas, Human Rights, Statistical Models.
What skills is Cesar Hernandez known for?
Cesar Hernandez has skills like Analytics, Sas, Data Analysis, Databases, Business Analytics, Microsoft Excel, Analysis, Sql, Statistical Modeling, Spss, R, Data Mining.
Who are Cesar Hernandez's colleagues?
Cesar Hernandez's colleagues are Darrel Matthews, Zachary P., Mike Altenhofel, Tiffany Greenfield, Shelley Call, Rob Murphy, Gavin Barnett.
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