John Shrefler

DevOps Engineer at Mellon Foundation
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Location
New York, New York, United States, US

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Credentials

  • Triplebyte Certified
    Triplebyte
    Mar, 2023
    - Sep, 2024
  • Passed FE Chemical, EIT Certification
    NCEES
    Jan, 2016
    - Sep, 2024

Experience

    • United States
    • Philanthropic Fundraising Services
    • 200 - 300 Employee
    • DevOps Engineer
      • Apr 2023 - Present
    • United States
    • Industrial Automation
    • 1 - 100 Employee
    • DevOps Software Engineer
      • Aug 2022 - Feb 2023

      - Worked as a key member of the DevOps team to provide smooth development, continuous deployment, and reliable operation of software for robotic workcells - Took on Site Reliability Engineer responsibilities maximizing uptime and availability of deployed systems by implementing and tuning open source monitoring and alerting stack - Developed and maintained scripts and tooling to automate routine tasks and improve productivity, including provisioning compute and networking equipment for production deployments - Maintained core cloud environment running in AWS, working with services including VPC, EC2 S3, IAM, CloudWatch - Collaborated with development teams to design and build software running natively in Docker and Kubernetes, resulting in highly scalable and resilient systems; Personally designed and built first high availability cluster for production deployment - Collaborated with development teams to design and build software running natively in Docker and Kubernetes, packaged as Helm charts, resulting in highly scalable and resilient systems; Personally designed and built first high availability cluster for production deployment Show less

    • United States
    • Software Development
    • 1 - 100 Employee
    • DevOps Engineer / Linux Systems Engineer
      • Sep 2020 - Jul 2022

      Various Systems work. Getting in good and early with our upcoming robot overlords. - Developed infrastructure to capture full state of the software system and continuously re-deploy to new and existing machines to maintain a uniform runtime environment - Manage software build environments and DevOps workflows for automated regression testing - Troubleshoot IT issues pertaining to networking, OS, compute hardware, storage - Daily scripting and tools development to automate any and all systems administration tasks - Containerized multiple applications in Docker, Kubernetes for portability and availability across hosts - Deployed proof-of-concept pilot projects to AWS using EC2, Lambda, ECS, EKS for backend services - Built automated data pipeline connecting external sources to internal reporting infrastructure Show less

    • Brazil
    • Graphic Design
    • 1 - 100 Employee
    • Web Applications Support Engineer
      • 2018 - Jul 2020

      - Integrated IIS web servers and applications into customers' existing environments, supporting large-scale system upgrades and promoting continuous optimization- Guided customers in projecting capacity and assessing hardware needs for upcoming years- Led third party web service integrations within customer environments- Developed internal tools for automating daily tasks in C#, Powershell- Advised customers on networking and server architecture, with the heaviest focus on security Show less

    • Technical Support Engineer, Pharmacy Application (Willow)
      • Mar 2017 - 2018

      - Led 10-person workgroup owning design, documentation, and small development projects for medication ordering functionality- Analyzed large data sets from customer environments to inform operational decisions- Bridged the gap between end users and backend developers for continuous improvement

    • United States
    • Higher Education
    • 700 & Above Employee
    • Research Associate
      • 2014 - 2016

      − Researched alternative methods of heat removal for high power generation electronics, applying mathematical solutions to fluid flow problems driven by large temperature differences − Implemented computational solutions using Python, Matlab, and Mathematica, writing unique code using numerical methods to solve differential equations − Utilized techniques of statistics and data science to manipulate and visualize complex data sets − Collaborated with the Japanese Aerospace Exploration Agency (JAXA) on-site in Tsukuba, Japan Show less

    • United States
    • Higher Education
    • 700 & Above Employee
    • Research Assistant
      • 2013 - 2014

      − Examined shape-controlled synthesis of silver nanoparticles, surface characterizations using electron microscopy − Optimized experimental parameters based on statistical analysis of size and shape distributions of particles − Performed batch reactions and utilized various techniques of wet chemistry − Examined shape-controlled synthesis of silver nanoparticles, surface characterizations using electron microscopy − Optimized experimental parameters based on statistical analysis of size and shape distributions of particles − Performed batch reactions and utilized various techniques of wet chemistry

    • Field Engineering Intern
      • 2011 - 2011

Education

  • Penn State University
    Bachelor of Science (BS), Chemical Engineering
  • University of Florida
    Master of Science (MS), Chemical Engineering
  • Georgia Institute of Technology
    Master of Science - MS, Computer Science
    2022 - 2024

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