David Ramirez

Analyst, Systems Administrator, RHCSA

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davidramirezmolina@gmail.com → LinkedIn

(979) - 422-3918 - Houston TX

Profile

Linux Systems Administration - Virtualization - Containers - Configuration Management - Scripting - Security - Documentation - IT-Infrastructure - Internet - Networking

Certification

Red Hat Certified System Administrator (RHCSA)

Skills

System Administration

Continuously improve systems performance, security and availability. LAMP stack expertise.
Extensive documentation abilities.

Consulting

Architect, deploy & administer hardware and software systems, with an orientation towards HPC environments.

Project Direction

Proven ability to lead and manage a wide variety of systems deployment projects in team and independent situations.

Technical

  • RHEL / CentOS / Ubuntu
  • LAMP stack, HAProxy, Supervisor
  • Docker, Kubernetes
  • Shell scripting
  • VMware, KVM VM lifecycle
  • Physical servers
  • SALTStack, CFEngine
  • DevOps support
  • Vulnerability Management
  • Identity Management (IPA)
  • MediaWiki, Atlassian Confluence
  • Microsoft Windows Server

Languages

Bilingual English / Spanish

Fluent German

Experience

U.S. Expediters - CPAP.COM

 Stafford, TX

Senior Linux Systems Administrator

2018-2021

Member of the infrastructure staff in charge of supporting a high availability Linux-based e-commerce platform, with extensive in-house development. Multiple LAMP systems (both intranet and internet-facing), CMS, back-office, VoIP telephony, and warehouse operations.
Main responsible for an extensive structured documentation initiative using Atlassian Confluence. Coadministered Atlassian systems such as Bitbucket, Jira, and Confluence, and e-mail systems such as Zimbra and Mailarchiva.
Configuration management using SaltStack.
Continuous vulnerability assessment and remediation (Rapid7/InsightVM), and systems hardening.
Administrative usage of VMware platform for a 200+ VM Linux farm, including VM lifecycle operations, and interaction with MS Windows Server components and 400+ end point stations.
Familiar with methodologies of the Agile workflow, EOS, SCRUM, and DevOps infrastructure support.
Supporting role in a new technologies project for critical application migration to AWS, including Docker, Kubernetes.

Parasol Laboratory - Texas A&M University

 College Station, TX

Systems Administrator & Analyst

2010 - 2018

Responsible for the management of the Parasol Laboratory research infrastructure. Support for internal and external research collaborators and external dissemination of research products; ensuring quality of service of the computing platform.
System administration for high-performance parallel and heterogeneous systems, including a Cray XE6m Supercomputer (NetApp storage), GPU/CUDA HPC servers (Supermicro, IBM), Dell servers supporting KVM and VMware virtualization, Rocks clusters, and 100+ Linux VMs and workstations (130+ internal and remote users), and their customization for the laboratory's research projects.
Red Hat Enterprise Linux, CentOS, Cray/SUSE, and Fedora platforms, including commissioning, OS and application migrations, backups and security.
Identity, inventory, change and configuration management; hardware and software integration, web mastering (3 major websites, various intranet servers), MySQL and PostgreSQL database servers, contents management server, revision control, and overall system administration, ensuring compliance with the State of Texas IT regulations.
Extensive documentation abilities supporting administrative collaborators and end users.
Assist in the organization of research meetings, sponsored project review meetings, and site visits that include internal and external participants.

Sungard Higher Education (PVAMU Campus ITS office)

 Prairie View, TX

IT Support Specialist

2009

Internship as Master student.
Second level help desk for a 8000+ students campus, Active Directory programming. Data center system deployment, server security analyst, virtualization prototyping and testing.

Prairie View A&M University

 Prairie View, TX

Research Assistant

2008-2009

While following a full time MSc program at the PVAMU, taking care of diverse assignments and projects supporting the Computer Science Department research and administrative activities. ABET documentation, LAMP software development.

Web Studio e-Solutions

 Bogota, Colombia

Information Technology Manager

2005-2006

Managed company technology aspects including overview and administration of the Linux server infrastructure, in close coordination with the CEO and CTO offices. Supervised a software development team for company growth initiatives, including deployment and support of SaaS CRM, CMS, e-mail, e-commerce and messaging solutions, custom development, and infrastructure issues. Red Hat Enterprise Linux and MySQL Integrator.

I.B.C. Zortek Systems

 U.S. company operating in Panama City, Panama

Project Manager

2005

Responsible for critical network relocation including data center, analog voice, VoIP, and internet services at Tocumen Airport in Panama. Coordinated work schedule through airport officials and multiple vendors for timely service continuity. Completed airport's infrastructure assessment towards LAN/WLAN, VoiP, PA and CCTV overhaul.

Orion Conectividad de Colombia Ltd.

 Bogota, Colombia

Technical Project Manager

2004-2005

Participated in the first and successful deployment of more than 200 JDS (Java Desktop/SUSE) workstations, at the time the largest such project in the country, delivered by Orion as partner of Sun Microsystems.
Developed plan to migrate from Windows platform. Provided solution to compatibility issues.
Supervised development, training of system administrators, and deployment teams.

Industrial Taylor Ltd.

 Bogota, Colombia

Director of Information Technology

1993-2004

Developed the company's Information Office as a critical business support unit, in permanent collaboration with the CEO and department leaders. Architected the company’s computing and networking infrastructure, including early adoption of Internet technologies and web presence. Performed system administration, software development and deployment, and responded for all data processing needs utilizing MS Windows Server, UNIX, and LINUX based servers.
Led the successful deployment of commercial ERP, CRM and POS systems in the company.

Siemens S.A. (Colombia)

 Bogota, Colombia

Electronics Laboratory Manager

1989-1993

Team leader in charge of an electronics servicing laboratory for nation-wide telecommunications infrastructure. Hardware and firmware upgrades, and quality assurance. Designed database applications and format converters to manage the operations and exchange information with the main office in Germany. Participated in field operations in Venezuela.

Education

Prairie View A&M University - Prairie View, Texas

M.Sc. Computer Information Systems

University of Los Andes - Bogota, Colombia

B.S. Electrical Engineering

University of Saarland - Saarbrucken, Germany

Graduate Practice - Information Technology

University of Southern California - Los Angeles, California

Workshop in Computational Science - 2009

Affiliations

Prairie View A&M University

Computer Science Department

Industry Advisory Council Committee - Member since 2012.

David Ramirez — — (979) 422-3918