Lister Ziemi
Roanoke,TX
Summary
Relevant 4 years as DevOps Engineer and 2 years as Solution architect managing build and deployment strategies on AWS cloud, adopted DevOps culture and Software Development Life Cycle (SDLC), implementing & thought leadership for all the latest, best and skewed practices of the IT Industry. Manage production application deployments in Kubernetes cluster using Kubectl An effective communicator with strong team management, analytical and problem-solving.
Overview
9
9
years of professional experience
1
1
Certified developer Associate
1
1
Certified Kubernetes Administrator
Work History
Systems Manager
- Cloud Orchestration / Automation: AWS CloudFormation, AWS Lambda, AWS, , AWS SSM Parameter Store, Ansible, Docker, Jenkins, ECS, EKS, Terraform
- AWS Security: AWS Security Hub, AWS Guard Duty, AWS Shield, AWS Firewall Manager, AWS Inspector
- Monitoring and Event Management: AWS CloudWatch (Events and Logs), AWS SNS, AWS S3
- Identity and Access Management: AWS Organization, AWS IAM, AWS AD Connector, Active Directory, AWS Workspaces, AWS Secrets Manager, etc
- Governance and Compliance: AWS Config Rules, AWS Organization, AWS Control Tower, AWS Trusted Advisor, AWS Well Architected Tool, AWS Budgets, AWS License Manager
- Programming Languages: Bash, JSON, YML, Python
- Application Delivery: Jira, Confluence, Jenkins, Bitbucket, AWS Code Pipeline, AWS Code Commit, AWS Code Build, AWS Code Deploy
- Data Protection: AWS Certificate Manager, AWS KMS, Snapshot Lifecyle Manager, AWS Cloud HSM
- Self Service: Service Catalog
- Network: VPC, VGW, TGW, CGW, IGW, NGW
- AWS Platform: AWS CloudFormation, AWS Lambda, AWS Systems Manager, S3, VPC, EC2, ELB, RDS, SNS, SQS, SES, Route53, CloudFront, Service Catalog, AWS Auto Scaling, Trusted Advisor, CloudWatch
DevOps Engineer (AWS, DevOps, Terraform)
Tank Tech Solutions
Dallas, TX
12.2020 - Current
- Collaborated with clients to target issues and uncover methods that would increase operational efficiency.
- Supervised client meetings to disseminate proper information and encourage participants to share ideas.
- Analyzed operability requirements for upgrades and new equipment installations.
- Designed administrative and maintenance procedures to provide optimal service uptimes and minimize service disruptions.
- Provided technical assistance during operational changes via both on-site support and remotely.
- Performed operational design reviews to determine feasibility and budgetary impacts of new proposals.
Cloud Engineer
System Soft Solutions
Dallas, TX
12.2018 - 11.2020
- Used metrics to monitor application and infrastructure performance.
- Provided technical leadership and delivered innovative products and services to address customer specific requirements.
- Worked with teams of talented software engineers to define, build and maintain cloud infrastructure.
- Worked with cloud architect to generate assessments and develop and implement actionable recommendations based on results and reviews.
- Designed and implemented system security and data assurance.
- Built and maintained network infrastructure consisting of Windows, Linux and virtual products.
- Monitored and tested application performance to identify potential bottlenecks, develop solutions and collaborate with developers on solution implementation.
- Participated in system development life cycle from requirements analysis through system implementation.
- Oversaw development and maintenance of organization computer systems and intranet.
- Reviewed existing systems and made recommendations for improvements.
- Identified, analyzed and resolved infrastructure vulnerabilities and application deployment issues.
AWS Solution Architect
AAK Technologies
Toronto, Ontario
02.2016 - 10.2018
- Identified and remediated single points of failure and security risks.
- Displayed sound understanding of standard networking protocols, virtual networks and load balancing.
- Defined cloud architecture for both hybrid and non-hybrid cloud solutions.
- Partnered closely with technical stakeholders to implement security, operational, compliance and privacy-related controls as part of cloud blueprints.
- Researched and understood emerging technologies and end-user needs.
- Provided architectural leadership and guidance to technical teams to deliver robust, highly scalable and cost-effective solutions.
- Maintained compliance with cybersecurity regulations and measures and tracked, assessed, integrated and reported on modernization and migration processes.
- Interfaced directly with customers, stakeholders and end-users regarding capability architectures, requirements use cases and stories to derive, develop and decompose next-cycle updates and specifications.
- Developed specifications, drawings and engineering artifacts and reports.
- Participated in system development life cycle from requirements analysis through system implementation.
- Designed and implemented system security and data assurance.
Linux Systems Administrator
MTN
Yaounde, Cameroon
11.2010 - 03.2013
- Provided input on hardware and software purchasing, prioritizing return on investment to optimize IT spending.
- Installed system-wide hardware components, confirming interoperation and compatibility with Linux-based software distros.
- Developed organization-wide administration policies to encourage continuity across multiple systems and facilities.
- Resolved vulnerabilities by making improvements to network security.
- Tuned system performance to optimize efficacy of new and existing hardware components.
- Coordinated cross-site installation of networked systems, confirming post-install connectivity.
- Enhanced availability of infrastructure through enterprise-wide planning, thorough testing, efficient implementation and comprehensive support.
- Performed network security design and integration duties.
Education
Bachelor of Science (BS) - Math and Computer Science
University of Buea
Skills
- DevOps
- Working experience with CI/CD tools like Jenkins to integrate with Pipeline, Maven, and Deploy plugins
- Configuring Jenkins with Tomcat server and setting up the port details
- Configuration Management using Ansible tools
- Complete understanding of Software Development Life Cycle and use cases of the Automation tools using Ansible and integration with Docker, Jenkins, Tomcat, Maven
- Working on various Docker components like Docker Engine, Hub, Machine, Compose and Docker Registry
- Integrating Kubernetes Cluster and Ansible Playbooks in Jenkins CI/CD flow
- Application deployment using Helm in to Kubernetes platform
- Cloud Infrastructure Services
- Amazon Web Services – AWS EC2, S3, EBS, VPC, IAM, Security Groups
- Understanding the Cloud Computing Stack: SaaS, PaaS, IaaS
- Implementing AWS Infrastructure services like EC2, EBS, and S3, VPC, ELB, Cloud Watch, Auto Scaling, EFS, VPC
- Working Knowledge in Amazon Web Services EC2
- Overall Implementation and Setup of EC2 instances, S3 Configuration, Load Balancer and Auto scaling for our Production Web Servers
- Creating, Copying, moving images from one EC2 region to another EC2 region and creating snapshot in RDS servers and Creating AMI images for EC2 Instances
- SSH Backup management using PEM key which is associated with the device
- Overall Implementation and Setup of AWS VPC for our Client to deploy applications on AWS Cloud for different environment like Dev, QA and Production systems/Servers
- Overall Implementation and Setup of EC2 instances, S3 Configuration, Load Balancer and Auto Scaling for our Production Web Servers
- December 2020 – Present System Soft Solutions DevOps Engineer (AWS, DevOps, Terraform)
- Job Role:
- Responsible to design Infrastructure & Application automation solutions, also oversees the Build and Deployment Pipelines
- Infrastructure: Amazon Web Services (AWS), CentOS, Jenkins, Apache Maven, Apache Tomcat, Docker, Docker, Kubernetes, Git, Bit Bucket, Ansible, Terraform, Packer, Consul
- Working with the Docker containerization and deploying the applications over Docker containers
- Good Understanding of DevOps culture and the CI/CD work flow using Jenkins with Git and GitHub Version controls
- Have knowledge on Sumo Logic monitoring to have work at Sumo dashboard level to monitor for any critical alerts
- Exposure in Systems Administration under multi-platform environments, including installation and configuration of software and hardware, server administration involving installation, configuration & maintenance, and disaster recovery management
- Have solid understanding how configuration management works and with the Ansible tool
- Have practical experience with Docker containers and docker hub registry
- Building the images and shipping the images to the hub registry then deploying on production servers using docker technology
- Configuring application health checks Liveness probe and Readiness probe parameters to monitor containers health
- Performing rolling updates when new source code version is released
- Managing source code version tagging and preparing release notes accordingly while handover to the service delivery teams
- Write Jenkins Pipeline code and automate Build and Deployments to Kubernetes using Helm
- Analyzed Jenkins Shared Libraries and integrating Shared Libraries in the Jenkins Pipeline for Application Deployments
- Writing custom Pipeline code for project specific build and deployments to the name spaces for Dev, QA, and Prod environment
- Responsible in preparing the build and deploying to non-prod environments and release notes to service delivery team for production deployments
- Configuration environment specific configuration and settings up database parameters while deploying into specific names spaces
- Responsible in troubleshooting build issues and coordinating with the Dev teams to fix the issues and defining the automated process for deployments
- Deployed 3-tier architecture infrastructure on AWS cloud using Terraform – IaC
- Migrate IAC base from Terraform 011 to 012x latest version
- Automate Instance configuration tasks using Ansible Playbooks
- Good hand on experience with Cloud Computing delivery model IaaS - AWS ( EC2, EBS, S3, IAM, Cloud Watch, Cloud Trail, Elastic Load Balancer, Auto Scaling, Route 53, Cloud Front, VPC, RDS )
- Have understanding in adopting DevOps Model and CI/CD work flow in integrating Git, Bit Bucket, Maven, Sonar, Jfrog, Tomcat, Ansible, Docker, Kubernetes clusters in automated deployments
- December 2018 – November 2020 Tank Tech Solutions Cloud Engineer
- Key Deliverables:
- Writing Wiki pages to document the process and design principles for future references and sharing with the teams
- Working knowledge with awslogs agent and creating metric filter for the cloud watch log groups
- Experience in Management & Deployment of scaling solutions in AWS cloud Platform
- Deploying AWS EC2 instances behind Elastic Load Balancer and Auto Scaling making sure of high availability by deploying the instances in Multi AZ
- Deploying RDS instances and providing endpoint details to the database teams and managing database snapshot methods
- Have involved in provisioning EBS volumes and attach to the EC2 instances - Create the File Systems on EBS attached volumes as per the business need
- Scheduling EBS auto snapshot backups using Cloud Watch Events
- Configuring IAM roles and attaching roles to the AWS services like EC2, S3
- Good understanding of VPC architecture and deploying the AWS services within VPC and managing the security using security groups, NAT instances, NAT gateways
- Have solid experience in writing Python script and configure lambda function to run daily basis and maintain EC2 AMI backup retention period
- Writing Python script to perform cross region backup for EC2 AMI
- Understanding organization requirements interns of infrastructure and taking decisions accordingly to procure workstations and deploying the EC2 instances
- Migrating services from one EC2 instance to another to have optimal computing resources utilization
- Handling production deployments and conducting performance impact analysis with Quality team
- Provided solution to configure Auto Scaling solutions to the production extraction services and writing python script to edit security group inbound rules automatically during Scale In and Scale Out operations
- Experience in configuring Build Pipe Line jobs in Jenkins and managing build and release
- February 2016 – October 2018 AAM Technologies, Toronto, AWS Solution Architect
- Designed for high availability and business continuity using self-healing-based architectures, fail-over routing policies, multi-AZ deployment of EC2 instances, ELB health checks, Auto Scaling, and other models based on customer’s functional and non-functional requirements
- Developed event processing architecture patterns with event trigger, logging, analysis, visualization, notification and responding
- Developed and implemented DDoS-resilient architectures
- Eliminated single point of failure in production architecture designs by deploying service instances (eg, EC2 or RDS) across two or more isolated AZs based on our customer’s actual resiliency and availability requirements
- Leveraged Auto scaling groups to right-size EC2 pools to match the level of demand and helped to manage costs by eliminating excess capacity to maintain optimal level of resources
- Planned, architected, and built large-scale data processing systems; orchestrated the successful implementation of data movement, transformation, analytics, and reporting solutions with the AWS cloud
- Managed provisioning of AWS infrastructures using CloudFormation and Terraform
- Designed for high availability and business continuity using self-healing-based architectures, fail-over routing policies, multi-AZ deployment of EC2 instances, ELB health checks, Auto Scaling, and other disaster recovery models
- Created patch management using Systems Manager automation for multi-region and multi account execution
- Implemented detective guardrails using Cloud Custodian policies and AWS config
- Designed and implemented for elasticity and scalability using Elasticache, CloudFront – Edge locations, RDS (read replicas, instance sizes), etc
- Developed a solution design document as well as low-level design for customer’s J2C-AWS
- Used AWS system manager to automate operational tasks across AWS resources
- Project Management -AWS Infra design and application migration
- Used System Manager to automate operational tasks across customer’s AWS infrastructure
- Built kinesis dashboards and applications that reacted to incoming data using AWS provided SDKs, and exported data from kinesis to other AWS services including EMR for analytics, S3 for storage, Redshift for big data and Lambda for event driven actions
- Developed and documented security guardrails for AWS Cloud environments
- Built custom images though docker server, docker compose with multiple local containers, and created production grade workflows and a continuous application workflow for multiple images
- Implemented multiple container deployments to AWS and maintained sets of containers with deployments
- Designed secure, cost-optimized, highly available, and fault-tolerant infrastructure in AWS
- Architected and configured Dev / Stage / QA environments in AWS (VPC, subnets, security groups, EC2 instances, load balancer, RDS, Redis, route53, etc)
- Implemented security best practices in AWS including multi-factor authentication, access key rotation, role-based permissions, enforced strong password policy, configured security groups and NACLs, S3 bucket policies and ACLs, etc
- Optimized cost through reserved instances, selection and changing of EC2 instance types based on resource need, S3 storage classes and S3 lifecycle policies, leveraging Autoscaling, etc
- Leveraged EC2 Create Snapshot API call to create snapshots of EBS Volumes on scheduled intervals
- Configured CloudWatch alarm rules for operational and performance metrics for AWS resources and applications
- Configured S3 events to set up automated communication between S3 and other AWS services
- Monitored end-to-end view of runtime systems CPU, bandwidth, disk space, and log files using NewRelic
- Deployed and configured infrastructure using Terraform and Ansible
- November 2010 – Mars 2013 MTN, Yaoundé, Cameroon Linux Systems Administrator
- Maintained server integrity by applying updates and patches per maintenance policies
- Configured and Managed NFS and Samba for File Sharing
- Configured and Managed Apache Web Service
- Performed package management, system updates using yum and rpm
- Created and resized partitions, including raid, logical volumes, and swap, formatted with ext3, ext4, and zfx
- Prepared Standard Operating Procedures (SOPs), work instructions, and related supporting documents based on Quality Systems Unit guidelines
Certification
AWS Certified DevOps Associate
Certified Kubernetes Administrator
Additional Information
- Integrating Ansible Playbooks with the Terraform templates to provision the Infrastructure in AWS. Building Packer Templates and creating AMIs in AWS cloud. Integrated Jenkins Pipeline with Apache Maven, Node, and Sonar to automate Continuous Integrations for Build. Integrated Jenkins Pipelines for Docker. Followed best practices on Software Development Life Cycle and use cases of the Automation tools using Ansible and integration with Docker, Jenkins, Tomcat, and Maven. Writing Kubernetes Deployment manifest files to include application deployment configurations. Responsible in monitoring the application health status and fixing the run time issues. Analyzing container application logs, identifying the issues and coordinating with the concern team to fix the issues. Written Jenkins Pipeline code using Groovy to integrate and automate the build & deployment tools for application deployments. Writing Helm Umbrella Charts and environment specific charts for Dev, QA, and Prod environments. Designed base line for Helm Charts to deploy application into different environment with specific custom configuration parameters. Writing manifest file definitions for configmaps, secrets and mounting these resources as volume mount and environment variables for application deployments. Configuring Docker Registries for new applications to store container images and integrating with Jenkins pipelines for automation. Configuring Jfrog artifactory management repositories to keep version-controlled maven artifacts for deployments. Automating integration tasks like GitHub to Bit Bucket code sync on schedule basis to sync the source code from GitHub to Bit Bucket.
Timeline
DevOps Engineer (AWS, DevOps, Terraform)
Tank Tech Solutions
12.2020 - Current
Cloud Engineer
System Soft Solutions
12.2018 - 11.2020
AWS Solution Architect
AAK Technologies
02.2016 - 10.2018
Linux Systems Administrator
MTN
11.2010 - 03.2013
Systems Manager
Bachelor of Science (BS) - Math and Computer Science
University of Buea