Open To Work
Charles Horowitz
Pittsburgh,USA
Work Preference
Summary
Senior Systems Engineer with experience in AWS, Linux, networking, security, and cloud migrations. Background in infrastructure automation, backend development, and production systems. Experienced in leading engineering projects, code reviews, and product development.
Skills
- Cloud & Infrastructure: AWS, Linux, Cloud Migrations, CI/CD, RPM, GNU Make, Git/GitHub
- Networking & Security: TCP/IP, Iptables/nftables, Network Security
- Languages & Databases: Python, Go, C/C, PHP, JavaScript, Bash, MySQL/SQL
Work History
Senior Systems Engineer
PacketViper, LLC
Pittsburgh, USA
01.2019 - 03.2026
- Managed migrations from on-premise infrastructure to AWS.
- Set engineering priorities for product development and bug fixes.
- Developed backend tools for customizing security solutions across customer environments.
- Conducted code reviews and supported stable production releases.
- Designed MySQL schemas and managed database migrations across mission-critical systems.
- Implemented remote upgrade system for reimaging Linux appliances in active production environments.
- Created security utility that mimics network services to create false targets for attackers.
- Developed secure Linux distributions based on CentOS 7 and Rocky Linux 9.
- Automated RPM and OS image builds using Git/GitHub, GNU Make, and CI/CD.
Solutions Architect/Engineer
PacketViper, LLC
Pittsburgh, USA
08.2017 - 01.2019
- Worked directly with customers to design network and security configurations.
- Used network data and reporting to configure filtering across customer environments.
- Helped develop analytics and reporting tools that improved usability and reduced training needs.
- Gathered customer feedback and worked with developers to improve product usability and performance.
- Led QA/QC efforts and addressed recurring customer workflow issues.
- Supported sales and customer onboarding by explaining product capabilities and limitations.
Database/Support Technician
PacketViper, LLC
Pittsburgh, USA
03.2016 - 08.2017
- Analyzed database structures and queries to ensure accurate customer-facing data.
- Resolved 95% of support cases, reducing number of issues escalated to engineering.
- Automated IP and geographic data collection and packaging using PHP, Python, Bash, and MySQL.
- Recreated customer environments on bare metal, VMware, and cloud platforms to troubleshoot issues and identify root causes.
Education
Master of Science - Geophysics, ABD
University of Pittsburgh
Pittsburgh08.2015
Bachelor of Science - Geology, Minor in Physics
University of Pittsburgh
PittsburghPublications
- Nimmo, J. R., Horowitz, C., & Mitchell, L., Discrete-storm water-table fluctuation method to estimate episodic recharge, Ground water, 53, 2, 282–292, 01/01/15
- Horowitz, C., Nimmo, J. R., & Mitchell, L., Use of the water-table fluctuation method to identify and characterize discrete episodes of positive and zero recharge, AGU Fall Meeting Abstracts, 12/01/11
- Mitchell, L., Nimmo, J., & Horowitz, C., The Episodic Master Recession (EMR) Program for R., US Geological Survey, 01/01/14
Overview
10
10
years of professional experience