DAVID GRENIER

DevOps Specialist

livegrenier@gmail.com

Location: Montreal, QC, Canada
Email: livegrenier@gmail.com
Languages: Fluent in English and French
Linkedinlinkedin.com/in/davidbgrenier

 

About me:

I'm a DevOps and Cloud Infrastructure Specialist with over 10 years of hands-on experience in designing and managing both cloud and on-premises environments. 

I've built automation solutions that empowers development teams and provide clear insights into system performance and deployment processes. 

My focus is on creating infrastructure that connects development with operations, helping teams work more efficiently. 

Over the years, I've learned that strong communication and critical thinking are just as important as technical skills when it comes to delivering real business value.

 

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Skills

Core competencies

Work Experience

Flinks

DevOps Specialist

Infrastructure Team

DevOps:
  • Implemented and maintained scalable infrastructure to improve uptime
  • Working with developers to ensure the deployment process from QA to preprod to prod is flawless
  • GitOps using ArgoCD + templating Kustomize manifests with CUE to facilitate redeployment
  • Building pipeline templates in various scripting languages to automate workflows and deployments
  • Training and documentation to improve usability of new processes 
  • Taking ownership of reliability and incident resolution
  Automating management of Kubernetes resources outside GitOps for improved efficiency
  • Exposing metric endpoints or pushing metrics into Prometheus / Thanos to use in AlertManager / Grafana
  • Provisioning and managing cloud resources in GCP & Azure with Terraform
  • Customizing Helm templates for ArgoCD deployments
  • Utilizing Azure DevOps for Git + pipelines + project planning

2022-02-01 - Present

Cloud.ca

Cloud System Administrator

Infrastructure Team

Sysadmin/DevOps:
  • Managing and troubleshooting:
    • Apache CloudStack
    • Citrix Xen Hypervisor
    • Block Storage (Pure, Datera, Solidfire) 
    • Object storage (Swift)
  • Deploying and managing Canonical MAAS to automate bare-metal deployments
  • Automating application deployments through Ansible, chef, Terraform / cloud-init
  • Building pipeline work flows to test and push changes in GitLab
  • On-site facility rack planning and installation
  • Managing internal infrastructure services:
  • ELK, RabbitMQ, MySQL/Postgres, Cloudera, Commvault, HashiCorp’s Consul, Vault & Packer
  • Creating Grafana (tsdb) & ELK dashboards to simplify monitoring visibility

2020-04-01 - 2022-02-01

iWeb / INAP

Senior System Administrator (Level 1-3)

Technical Support Team

Public Cloud:
  • Using Openstack’s API to deploy and manage instances, images, networks, object & block storage
  • Troubleshooting a broad range of issues for bare-metal & virtual instances on INAP’s OpenStack

• Deploying and managing high availability private cloud infrastructures: 
    • Hyper-V Failover Clusters + Hyper-V replication • ESXI + vCenter

Managing and deploying SAN’s: 
  • Dell: 
    • EqualLogic • PowerVault • Unity 
  • NetApp (ONTAP) 
  • targetcli

Managing and deploying cluster solutions (using Ansible to automate deployment):
    • MSSQL virtual cluster solutions (Failover Cluster / AG)
    • NFS and MySQL clusters with DRBD & Pacemaker + Corosync
    • IIS + replication (DFS) • MySQL replication
    • Load balancing:  
      • HAProxy / HAPEE 
      • iptables/firewalld nating and routing
      • Keepalived (VRRP / LVS)
      • F5 Load balancing

Networking:
    • Deploying & managing Cisco ASA firewalls (VPN S2S, L2TP,  Anyconnect, NAT/ACLs, Failover)
    • Switch port management and debugging: Juniper, Cisco, Dell (Q-in-Q, LAG, LACP)
    • Information gathering during incidents (MTR, Iperf, Nmap, tcpdump)

Other System Administration Tasks:
  • Last level of escalation for technical issues and inquiries (+ on call)
  • Training & coaching system administrators Level 1 & 2
  • Installing and troubleshooting web, DNS, mail, & database services on Linux and Windows
  • Configuring Nagios monitoring for customer environments
  • Scripting tasks and processes for the support team
  • Managing & troubleshooting hardware and software raids

2016-10-01 - 2020-04-01

Mustang technologies

System Administrator

Technical Support Team

Linux / VMware ESXI / Windows Server / Networking:
  • Deploying and managing ESXI nodes for a variety of shared/managed web hosting solutions
  • Deploying and troubleshooting Apache + varnish, BIND, SMTP, & MySQL/MS SQL services
  • Deploying and troubleshooting CMS platforms such as: Wordpress & Magento 
  • Managing Windows services for internal operations (AD/GPO/DNS,SMB & PPTP services)
  • Configuring and managing PPPOE connections on FreeRADIUS for DSL connectivity

2015-04-01 - 2016-10-01

Techspa Inc

IT Technician

Local store

Computer Repairs:
  • Deploying workstations, networking (pfSense/Linux) & NAS storage for small business offices
  • Deploying and supporting Linux workstations for small businesses and consumers
  • Performed on-site repairs and maintenance on personal / business workstations
  • Replacing defective components for Apple devices & workstations
  • Analyzing system activities with Sysinternals tools to mitigate and eliminate malicious processes
  • The ability to identify and troubleshoot hardware and OS problems on workstations


 

2013-05-01 - 2014-08-01

ABOUT WEBSITE

Hello,

Thank you for coming to my website, this website is to show case my work experience in IT, the website is self-hosted, running in a container, and was created with Django.

The code for this website can be found here: https://github.com/livegrenier/davegrenier#source-website-of-davegrenierca

Regards.