Mario Chavez-Rivas Jr
Clarksville,TN
Summary
Systems admin with over 6 years of Python programming and Linux experience with a focus in Cybersecurity. CEH and Security+ certified. Adept at learning new concepts and adapting to new roles quickly and efficiently. Innovator and self-starter with a talent for solving problems with a Top Secret security clearance.
Overview
11
11
years of professional experience
Work History
Client Systems Admin
Air Force
Nashville, TN
08.2017 - Current
- Create new PowerShell logon-scripts to increase Security Compliance across 900+ devices on Base.
- Write, test, and maintain PowerShell scripts to automate reboots and software installation across 300 devices daily.
- Design, write, and implement Python/Django 'Helpdesk Ticketing System' (web application) with Microsoft SQL backend.
- Design, write, and implement Python/Django 'Phone Book' (web application) with Microsoft SQL backend.
- Design, write, and implement Python/Django 'Project tracking tool' (web application) with Microsoft SQL backend.
- Design, write, and implement Python/Django 'Kanban Board' (web application) with Microsoft SQL backend.
- Write and implement desktop alert notification system in PowerShell/python.
- Utilize SolarWinds to monitor for anomalies across base servers.
- Run ACAS (vulnerability scanning) scans to identify security vulnerabilities.
- Develop and maintain vulnerability mitigation scripts in PowerShell.
- Write and maintain Python scripts to update MS SQL database.
- Write and maintain Python tools to update VOIP phone server entries.
- Design and write Python desktop GUI application to improve customer experience.
- Established and Implemented change-management process in compliance with ITIL standards.
- End-user support technician proficient with providing assistance in use, troubleshooting, and security compliance of all hardware/software provided to base personnel while prioritizing efficiency and security.
- Manage and maintain group policies for active directory accounts and maintain devices on domain to include laptops, desktops, tablets, printers, and smartphones.
- Ensure software compliance with Air Force security policies across all base systems.
- Troubleshoot and resolve hardware and network issues with client devices.
- Installation and updating of McAfee on user devices.
- Conduct in-depth analysis of Security issues that may affect base devices.
Store Systems Administration
Genesco Inc
Nashville, TN
05.2018 - 12.2021
- Responsible for installation, configuration, upgrade, administration, and support of remotely distributed Linux store systems
- Additional responsibilities include assisting store support helpdesk personnel in troubleshooting issues with Linux store systems and providing quality assurance testing on Point of Sale software patches and upgrades
- Maintaining, implementing, and supporting scripts and automation written in bash/python
- Setup and maintain store systems (Linux OS)
- Setup and maintain custom YAST repository for support of DEV environment maintenance and automation
- Provide computer/network support relating to software and hardware failure on Linux systems.
- Write, test, and implement shell and Python scripts to automate and simplify support of 2600 remote Linux store systems
- Maintain high level of Linux store systems knowledge and associated application software to provide high levels of support
- Assist in quality assurance testing of applications that run on Linux store systems.
- Manage, write, maintain RPM's for SLES environments
- Design, build, maintain Python code for GUI automation
- Write, test, and implement scripts to query and maintain AWS databases
- Use puppet to manage files across remote sites.
- Write, test, and maintain Python code (bot) to interact between Slack messaging service, Smartsheet, and users.
- Write, test, and maintain Python based email scraping automation
- Write, test, and maintain Python programs to read and perform actions based off of PDF reports
- Write, test, and maintain Python program to read XML reports and load into Oracle DB
- Setup and maintain SVN repository for vendor source control to include user access and permissions
- Design, build, and deploy customized ORACLE Linux OS
DevOps Analyst
Cybera Inc
06.2016 - 05.2018
- Esign, develop, improve cross-platform web-app using Django (Windows/Ubuntu server)
- Eader of Universal Policy Controller team; responsible for process development and training of 2+ members
- Rite, maintain, optimize anywhere from six to eight daily reports across multiple servers
- Onduct automated database queries to aid in reporting or customer requests using Python (MySQL/Oracle)
- Erform automated maintenance to large amounts (1000+) of devices using Python (removal and building of
- SL tunnels and related authentication profiles)
- Erform automated changes to large amounts (1000+) of device configuration files using Python
- Erform automated creation of new device configurations using Python
- Evelop, write, maintain over 40+ command line tools (Python) for other departments
- Reate, maintain, and improve proprietary, custom Python package
- Reate and maintain archive system
- Ptimized reports on average by 40%
- Ptimized automated creation of new devices by 80%
- Mplemented new processes for reporting, maintenance, and tool development
- Reation of custom python package for standardization of common tasks
- Sudo user
- Upgraded PCI compliance of older tools
Network Technician
Cybera Inc, Solutions Management Center
02.2015 - 05.2016
- Completed submitted trouble tickets for network issues.
- Dentify and troubleshoot customer issues including but not limited too:
- AN issues
- SP issues
- Ompany hardware configuration issues
- PN issues
- Rite small command line tools to aid coworkers (bash, python)
- Orking with customers, handle setup and configuration for new locations
- Andle upgrades to configurations for existing sites
- Onfigure and setup customer modems
Education
Bachelor of Science - Software Development
Western Governors University
Millcreek, UT07.2023
Information Technology
American Military University
Charles Town, WVHigh School Diploma -
Montgomery Central High School
Cunningham, TN05.2011
Skills
- CompTIA A (Dec 2021)
- ITIL Foundations (April 2021)
- ACAS (Jul 2020)
- PowerShell in Depth - May 2020
- Certified Ethical Hacker (Sep 2019)
- CompTIA Security (Aug 2019)
- Python Programming (Jun 2017)
- Korn and Bash Shell Programming (Jun 2016)
Timeline
Store Systems Administration
Genesco Inc
05.2018 - 12.2021
Client Systems Admin
Air Force
08.2017 - Current
DevOps Analyst
Cybera Inc
06.2016 - 05.2018
Network Technician
Cybera Inc, Solutions Management Center
02.2015 - 05.2016
Bachelor of Science - Software Development
Western Governors University
Information Technology
American Military University
High School Diploma -
Montgomery Central High School