Nelson Alejandro Crespo Peñalver

System Administrator - DevOps, Bachelor’s Degree in Computer Sciences Email: ad2quh@r.postjobfree.com

Linkedin: linkedin.com/in/nelson-crespo-357508b0

PROFESSIONAL SUMMARY:

Proficient Linux System Administrator - DevOps, more than 5 years of experience.

Proficient working with Hardware/Software support, most than 8 years of experience.

Experience working knowledge in UNIX and Linux shell environments using command line utilities.

Experience with FreeBSD, Debian, CentOS and Windows Server installing production servers from scratch.

Experience working with DNS, DHCP, NTP, Firewalls, Proxy, Chat, FTP, ADDC, OCS Inventory services, among some others.

Experience working knowledge in Virtualization environments.

Hands on experience working with AWS services.

Hands on experience working with Routers and Switches configurations and WAN, LAN, WiFi networks.

Experience with Version Control Systems such as Git and Github.

Hands on experience working with Client Workstations and Servers Hardware.

JavaScript and Python programming languages knowledge.

MySQL relational database knowledge.

Excellent Interpersonal and communication skills, efficient time management and organization habits and good at teamwork.

Highly motivated for improving IT skills and work together with the whole team to achieve the same goal. TECHNICAL SKILLS:

Infrastructure, Virtualization,

Orchestration

VMware, KVM, Proxmox, VirtualBox, Docker, Kubernetes, Zentyal, ClearOS, pfSense, Ansible, OCS Inventory, DNS, DHCP, NTP, Firewalls, Proxy, Chat, FTP, ADDC

Cloud technologies AWS

Operating Systems FreeBSD, Debian, CentOS and Windows IDEs/Tools Visual Studio Code, Notepad++, Sublime

Version Control Git, Github

Programming Languages JavaScript, Python

Web Technologies HTML, CCS3, ReactJS, NextJS, NodeJs, WordPress Hardware Servers, Workstations, RAM, HDD, Video Cards Languages Native Language: Spanish. Other ones: English, Portuguese TRAINING AND COURSES:

IT Certifications

Linux Professional Institute - Linux Essentials 2023 AWS Certified Cloud Practitioner (CLF-C01) 2023

Udemy courses and certifications

Introduction to Cloud Computing on AWS for beginners 2023 Next.js & React - The Complete Guide (incl. Two Paths!) 2023 CSS - The Complete Guide 2023 (incl. Flexbox, Grid & Sass) 2023 LPI Linux Essentials Complete and Exams 2023

LPI Linux Essentials 010-160 (6 Practice Exams) 2023 Ultimate AWS Certified Cloud Practitioner 2023

AWS Certified Cloud Practitioner (6 Practice Exams) 2023 Dive Into Kubernetes - Containers, Docker and Kubernetes 2023 Kubernetes for the Absolute Beginners - Hands on 2023 AWS Initiate Madrid Conference 2022

English language courses

Commercial English at Training National Center 2019 Interchange method at La Salle Center 2014

Interchange method at Abraham Lincoln School 2014

System Administrator and Network Manager courses

Kerio Control firewall at DESOFT 2020

pfSense firewall at DESOFT 2020

IT networking at Agriculture Ministry 2018

On Linux CentOS at Cubatel S.A 2013

On Debian GNU/Linux at DISAIC 2011

Web Development courses

HTML5 + CSS at DESOFT 2015

PHP + MySQL at Cubatel S.A 2013

Microsoft Office 2007 Academic Diploma 2013

This diploma is recognized by Cristobal Colón University in Veracruz, Mexico PROFESSIONAL EXPERIENCE:

Client: Gaichu Managed Services 2023

Role: Freelancer

Hired by Gaichu Managed Services while I lived in Portugal Client: Cuban National Music Museum (Havana, Cuba) 2021-2022 Role: System Network Administrator

Responsibilities:

In charge of the whole IT network change process.

Analysis phase for detecting physical and logical networking issues.

Analysis phase of the new equipment and technology required to get the desired results.

Responsible for installing and maintaining network services such as Firewall, DNS, DHCP, FTP, NTP, ADDC, involving tools like Zentyal and pfSense.

Responsible for installing a different Virtualization Technology (Proxmox).

Help with detecting and solving hardware issues out.

Workstations configuration.

Maintaining of FileMaker platform.

Client: Cuban National Standardization Office (Havana, Cuba) 2020-2021 Role: IT Network supervision and assistance

Responsibilities:

Responsible for installing a different Virtualization Technology (Proxmox).

Responsible for installing a new infrastructure services based on Debian, pfSense and Zentyal and checking periodically their performance.

Router, Switches and Workstations configuration. Client: Projects and Engineering Enterprise (Havana, Cuba) 2018-2021 Role: System Administration - DevOps team, involved in activities such as:

Working with VMware, Proxmox, Zentyal, ClearOS, pfSense, FreeBSD, Debian, CentOS and Windows.

Responsible for maintaining the high availability of one of the most important enterprises network at Agriculture Ministry, being this place the Headquarters of 20 branches where is used to work under pressure, at the same time this network belongs to one of the largest computer networks in the country (EICMA network).

Installing OCS Inventory based on Debian to control and manage the network devices.

Responsible for updating the services, checking logs, collecting proxy server data to analyze the traffic, giving the best possible high availability service.

Being part of the enterprise website deployment process, using WordPress and MySQL.

Responsible for deploying third IT solutions to manage Economy and Human Resources Departments processes.

Configuring VLANs based on layer 2 switches.

Working with Access Points to spread the networking services through WiFi to the final clients.

Solving Client Workstations and Servers Hardware issues as well as Workstations configurations.

Going to some branches for checking, solving issues and installing network services.

Interchange of IT solutions between the dependencies (branches).

Responsible for installing new services and checking their performance daily and weekly. Client: Residence of Health Care Professionals Ramón Paz Borroto (Havana, Cuba) 2011-2021 Role: Head of IT Department - System Administrator Responsibilities:

Logic network design of the biggest Residence building of Ministry of Public Health, located in Vedado.

Working on the physical networking process.

Responsible for giving a solution and organizing the whole network project, from the equipment required to install the services such as NTP, DNS, DHCP, PROXY SQUID, FTP, ADDC among other ones where were involved tools like KVM, Windows Servers and Linux Operating Systems.

Responsible for updating the services, checking logs, collecting proxy server data to analyze the traffic, giving the best possible high availability service.

Responsible for deploying third IT solutions to manage Economy and Human Resources Departments processes.

Solving Client Workstations and Servers Hardware issues as well as Workstations configurations.

Installing OCS Inventory based on Debian to control and manage the network devices.

Router, Switches and APs configurations.

Training new IT technician.

Sharing knowledge with other Health Care Professionals Entities. EDUCATION:

2006 - 2011: Bachelor’s Degree in Computer Sciences - University of Informatics Sciences Havana, Cuba.

* Nelson has been able to develop more than one task at a time, that s why he belonged to different enterprises at the same period being hired full time by Projects and Engineering Enterprise while half time by Residence of health care professionals Ramón Paz Borroto (Havana, Cuba) since 2018. Before was full time at the Residence of Health Care Professionals.

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