SUMMARY:

• Extensive use of the Linux Operating systems: system administration, installation and configuration per project requirements.
• Standar Linux and Windows network troubleshooting, security and monitoring tools like: nmap, netstat, ping, tcpdump, wireshark, ip, route, dig, ssh, UFW, iptables, traceroute.
• Intermediate shell (BASH) scripting.
• Experience with Confidential equipment like: AP, switches and routers in small environments. Also some experience with HP Switches for server environment.
• Virtualization Type 2 was used only. Software like Oracle Virtual Box was used.
• Experience with data centers: installation of servers, network equipment and patch panels, cabling, remote access.
• Bilingual (English and Spanish).

PROFESIONAL WORK EXPERIENCE:

Confidential

App/Cloud Support Associate Manager

Responsibilities:

• work on tickets, created/update and maintain VM’s.
• Solution may include the use of tools like Terraform, Puppet, python, bash, powershell and ruby scripts.
• Documentation includes: Proof of Concept, Design and training manuals.
• Linux (RH and Debian based), Windows 2016 Server, Windows 10. SAP: Support of Worksoft and ARIS software.

Confidential

Linux System Administrator

Responsibilities:

• Main duty was solving tickets as required and support application users in a timely manner.
• The creation or mainly update of scripts in languages like: puppet, bash and powershell.
• Reports and postmortems were created as required.
• Tickets were highly documented with proper problem resolution.
• For client support, manuals were created with software installation, configuration and troubleshooting with lesson learned identified as playbooks for easy resolution during outages.
• As a Sys Admin you are required to learn and use Confidential internal and in many times proprietary tools to solve problems.

Confidential, Santa Ana, CA

Systems Administrator

Responsibilities:

• As Linux Systems Administrator, shared the responsibility with team mates with the support for all Linux servers (Metal and Virtual).
• Business requirements identified Debian as the standard even though some servers were Red Hat.
• Creation of documents and wiki update as required.
• Weekly deployments of proprietary software on production servers. May include .deb files, Puppet for automation, Postgres SQL script and any other process per the technology involved.
• Support of Development Department or any other entity that requires access to the Linux environment.
• Systems monitoring with ICINGA a Nagios based system.
• BASH and PERL script verification (update) and/or execution.
• Biweekly on call rotation.

Confidential

Linux Systems Administrator

Responsibilities:

• Proper selection of hardware and smart decision making allowed me to save thousands of dollars that were ultimately used on server’s hardware to further improve modeling time.
• Use BASH scripts to automate processes, backups, satellite image downloads, run other processes created on other programing or scripting language.
• Responsible for supporting all office employee or students at all times (24/7, including weekends, on different locations).
• Access to Mac Computers on remote locations for HF Radars around the island of Puerto Rico.
• Operating Systems used: MS - Windows (XP, 7, 8, 8.1, 2008 Server), Linux (CentOS, Ubuntu Desktop, Ubuntu Server, OpenSUSE, Rocks), Apple Mac OS family (no servers).
• There was a mix of CentOS (90% of server were Red Hat based) and Ubuntu Server used for LAMP (web page), TOMCAT for data publishing and research.
• All systems were dependent on some other server in the office because of the nature of the data. The decision to use CentOS or Ubuntu was based on the availability of packages in the repos, required programming/scripting if any and the amount of time required to make it work, taking into consideration future outages.
• A sandbox was used to test which software made it to production.
• Linux OS hardening, SSH hardening, Firewall configuration, Apache Hardening (Ubuntu uses mods to accomplish this). OWASP TOMCAT, PHP and MY-SQL hardening was also used when possible. Security script like denyhosts and fail2ban were also used. Pen Testing was used to test hardening whenever possible.
• Drupal Content Management System (CMS) installation, configuration and updates as part of the LAMP install. Maintenance of previously created scripts or the creation of new ones to comply with CariCOOS current or new requirements. The use of BASH, AWK, PHP, C++ and Python was used to comply with these requirements.
• A number of PHP scripts where used to update the My-SQL Data Base containing oceanographic data.
• These scripts were created by a student under contract but on the long run, as part of my responsibilities these scripts were updated as required.
• Network: Maintenance of communication equipment and networks was of the highest priority because of the nature of the business.
• That is, real time data. As part of a new networks installation duties include: purchase, installation, configuration and maintenance while maintaining communication with Confidential personnel and comply with both CariCOOS and University of Puerto Rico requirements.
• The creation and installation of Cat 5 cables was used extensively. Fiber channel cable was purchased and installed as required.
• Documentation and Training: Documentation was created for historical reasons and to be able to fix a problem later on during the code or systems life cycle.
• These documents were use as training material or as base to create new systems or procedures.
• Virtual Box was used to virtualize Linux or Windows images per requirements.
• These virtual machines would execute a combination of programs and scripts to support the data gathering and publishing effort.
• A number of seminars were requested by Professors and students on the proper use of a Linux shell, scripting and systems use.
• Installation and maintenance of all systems: network, laptop, desktops, servers.
• Configure and troubleshoot computer hardware and networks.
• Maintaining maximum availability of supported services for users.
• Designs and coordinates installation or expansion of computer network.
• Producing reports and documentation on procedures & guidelines.
• Responsible for disaster recovery, closing security loopholes and access levels.
• Evaluate systems status and recommends updates/upgrades as needed.
• Coordinate, Supervise and monitor third party suppliers and contractors.
• Participate on the research and planning of infrastructure requirements.
• Obtaining quotes for supply of goods and services from suppliers.
• Identify and recommend improvements for applications & Web-page dev.
• Work in teams with researcher to support modeling/experiments and other efforts.
• Support research proposal creation regarding to computers, HPC and networks.
• Create, analyze and discuss TCO analysis of all systems.

Confidential

Systems Analyst

Responsibilities:

• International Traffic in Arms Regulations ( Confidential ) controlled code verification was done using Ada and C++.
• Web page maintenance using HTML, JavaScript or PW owned scripting language.
• Documentation creation per requirements as stipulated on contracts or company policy.
• Duties as a Help Desk Technician: support engineers . attend phone call or email, create case, contact client, try to solve issue, document issue, close case or send to level II technicians.