Linux Administrator Senior

FUNSO TIMOTHY

+1-301-***-**** **************@*****.***

SUMMARY

Accomplished Senior Linux Administrator with over 9 years of experience in designing, implementing, and optimizing IT infrastructures to ensure system stability, security, and efficiency across diverse environments. Possessing a strong ability to troubleshoot, adapt to dynamic conditions, and deliver reliable solutions, I thrive in high-pressure scenarios that demand technical expertise and innovative problem-solving.

Proficient in managing Linux systems (RHEL 7.x, 8.x, and 9.x) and Windows environments, with a focus on configuration management, system maintenance, and backup strategies for business continuity.

Skilled in scripting and automation using Bash, Python, and Ansible to enhance infrastructure management, improve operational efficiency, and minimize manual intervention.

Extensive expertise in virtualization technologies like VMware and KVM, enabling efficient resource allocation, reduced

downtime, and robust system scalability...

Adept at deploying and managing containerized applications using Docker and Kubernetes, ensuring efficient and scalable application solutions.

Comprehensive knowledge of network administration, including TCP/IP, DNS, DHCP, VPN, and firewall management, ensuring secure and reliable connectivity across systems.

Proven proficiency in leveraging cloud platforms such as AWS and Azure for infrastructure and platform services, achieving

scalable, secure, and cost-effective IT solutions.

Experienced in implementing security protocols such as SELinux, encryption techniques, and compliance with industry standards, ensuring robust system security and data protection.

Expertise in managing Active Directory services, configuring group policies, and handling authentication processes for efficient user and resource management.

Skilled in using monitoring and logging tools such as Nagios, Prometheus, and the ELK stack to maintain high availability

and performance across IT systems.

Demonstrated leadership by training and managing a team of 30 IT professionals, achieving a 15% productivity increase and a 10% annual improvement in quality audit scores.

Designed and implemented disaster recovery plans, safeguarding critical data and ensuring swift recovery during

emergencies.

Dedicated to Agile methodologies, fostering collaboration, innovation, and timely project delivery within cross-functional teams to meet business objectives.

Passionate about continuous learning and staying updated on emerging technologies, actively contributing to knowledge-

sharing initiatives to drive organizational success.

SKILLS

Linux & System

Administration

Linux System Administration, RHEL (Red Hat Enterprise Linux), CentOS, Ubuntu, Active Directory, Group Policies, Server Security

Scripting & Automation

Bash Scripting, Shell Scripting, Ansible, Puppet, Terraform, CI/CD (Jenkins)

Cloud Platforms

AWS (Amazon Web Services), Azure, Google Cloud

Containerization

Docker, Kubernetes, VMware Aria

Networking & Security

TCP/IP, DNS, DHCP, VPN, Firewalls, SELinux, SSH, Network Protocols

(TCP/IP, DNS, DHCP, SNMP), Encryption Techniques, IDS, NFS, Samba

Virtualization & Platforms

VMware, KVM, Red Hat Satellite, Hyper-V

Backup & Disaster Recovery

Disaster Recovery, Backup Strategies, Server Recovery, Red Hat Satellite,

Data Recovery Plans

Compliance & Security

Security Engineering, Security+ Certified, Security Audits, Vulnerability

Scanning, Regulatory Compliance (HIPAA, GDPR)

Database & Application Servers

MySQL, PostgreSQL, MongoDB, Microsoft SQL Server, Oracle

Monitoring & Logging

Nagios, Prometheus, ELK Stack

PROFESSIONAL EXPERIENCE

Senior System Administrator, United States Department of Labor, 05/2024 - Present

Washington, DC

Utilize YAML to define and automate the provisioning of key AWS services, ensuring streamlined consistency in management across multiple environments

Managed upgrades and patches for Nutanix clusters ensuring system reliability and security compliance

Configure and manage cisco routers 9300 and deploy Palo Alto PA-440 firewall to enhance network security and improve performance

Integrate AWS CloudWatch insights to track, analyze, optimizes services such as EC2 using YAML configuration for automated deployment and monitoring

Configured and administered network protocols and software including TCP/IP, DNS, reverse DNS, NNTP, HTTPD, SNMP and performed server security using KERBEROS, SSH, RLOGIN, OPIE and HESIOD.

Configuring and managing Splunk, ELK stack, Cloud watch, NAGIOS to analyze log files and collect the data. Monitoring the log files across the application servers and web servers.

Launch EC2 Instances (Linux and Windows) on AWS Cloud.

Leverage Terraform to automate the provisioning and management of AWS resources including S3, VPC, RDS, ensuring infrastructure consistency and scalability

Utilized Tanium to manage, monitor and secure endpoints across Newtok environments ensuring real time visibility and rapid response to security incidents

Proven expertise in driving cost optimization for AWS environments through the strategic use of Nutanix technologies, focusing on resource allocation, workload automation and performance efficiency

Architect, Deploy and Maintain Windows Server and Linux-based virtual machines in AWS

Skilled in Active Directory administration and the implementation of windows servers local group policies to enforce organizational security standards.

Implemented and maintained patch managements process using Tanium ensuring the endpoints remain compliant with organizational security standards and reducing exposure to threats

United Health Group, Minnetonka, MN July 2019 – April 2024

Senior Linux Administrator

Spearheaded the administration and security of electronic medical records (EMR) networks, local area networks (LANs), and wide area networks (WANs), optimizing network performance and cost-effectiveness.

Implemented robust network security measures, including regular patches, updates, and backups, ensuring the protection of sensitive data and minimizing security risks.

Established and maintained Linux file system security protocols using Security-Enhanced Linux (SELinux), providing a secure environment for server data and network configurations.

Developed and deployed Ansible playbooks for server configuration management, boosting automation and streamlining infrastructure tasks for enhanced operational efficiency.

Defined and enforced policies for system maintenance and provisioning, aligning with business goals, regulatory requirements, and industry best practices to ensure high availability.

Troubleshot and resolved network connectivity and configuration issues, utilizing ServiceNow ticketing

system to manage incident response and service requests efficiently.

Collaborated with the IT team to design and implement new network solutions, configuring and maintaining routers, switches, and other network devices for optimized system performance.

Administered Red Hat Enterprise Linux (RHEL) 7.x, 8.x, and 9.x servers, ensuring high system uptime, minimal

downtime, and seamless functionality for critical systems.

Managed and maintained Active Directory services, focusing on user management, group policies, security, and

authentication processes to ensure organizational efficiency and compliance.

Operated and managed Oracle-based infrastructure and platform services, enabling cloud application development and scaling.

Exhibited leadership and strong interpersonal skills in a collaborative environment, fostering creativity, innovation, and

effective communication within the team.

Designed and documented comprehensive disaster recovery plans for the rapid recovery of EMR data and critical hospital systems, reducing potential operational disruptions.

Deployed and managed VMware Aria for cloud platform services, optimizing cost management and enhancing overall operational efficiency.

Configured and maintained Red Hat Satellite for effective patch management, ensuring systems were up-to-date with the latest patches and security fixes.

Installed, configured, and upgraded hospital information system (HIS) applications, ensuring the latest patches and security fixes were applied to protect sensitive hospital data.

Bank of America, Charlotte, NC Jan 2015– June 2019

Linux System Administrator

Spearheaded the setup, monitoring, and troubleshooting of DELL server hardware, including resolving issues with CPUs, DIMM memory, HDDs, adapters, fans, and power supply units (PSUs) to ensure optimal server performance.

Addressed incident tickets related to sub-system failures, collaborated with the Break/Fix team to execute server configuration changes, and performed hardware replacements to minimize downtime and enhance system reliability..

Developed and implemented Bash scripts to automate routine tasks, schedule jobs, and optimize system configurations, improving system performance and reducing manual intervention.

Applied security measures using Secure Shell (SSH) keys and encryption techniques to ensure secure server connections, contributing to the integrity and confidentiality of sensitive data.

Managed network resources using Active Directory and Azure Directory, facilitating seamless integration and centralized management of user accounts and system resources.

Installed and configured Sophos PureMessage for spam and malware protection, safeguarding sensitive email data and ensuring smooth mail delivery across the organization..

Served as a subject matter expert for RHEL 7.x, 8.x, and 9.x servers, providing expert guidance and troubleshooting support to the team for complex Linux systems issues..

Managed Docker containers, implemented Jenkins CI/CD pipelines, and authored Terraform code for provisioning resources on Azure, including security groups, virtual networks (VNet), and virtual machines, streamlining infrastructure management and deployment processes.

Analyzed and resolved CPU and memory-intensive processes, using commands like pgrep, pkill, kill, and jobs to prioritize and terminate processes, ensuring system stability.

Configured and managed YUM and RPM repositories, utilized GPG keys, and enforced file management using GID and ACL to efficiently deliver software packages and ensure smooth system operations.

Enhanced system monitoring by optimizing logging, reporting, and alerting mechanisms, ensuring proactive system issue detection and resolution.

Collaborated with cross-functional teams to improve system performance, identifying opportunities for optimization and ensuring smooth integration with other departments.

Ensured high availability and reliability of systems by maintaining critical infrastructure components, reducing downtime and increasing operational efficiency.

Conducted system audits to identify performance bottlenecks, recommending and implementing solutions for performance tuning and efficiency improvements.

Provided training and support to junior system administrators, enhancing team productivity and fostering knowledge sharing to build a stronger IT department.

EDUCATION

Bachelor of Science In Construction Engineering University of The District of Columbia - Washington, DC

Sep 1995 - June 2000

Certifications

•Secret Clearance Red Hat Certified System Administrator (RHCSA)

•Red Hat Enterprise Linux (RHEL) CompTIA Security +

•Project Management State of Maryland Certified Auditor (SMCA)

•Certified Tax Consultant State of Maryland (CTCSM)

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