SUMMARY

• A Linux Systems Engineer with 5 years of experience in enterprise infrastructure support and operations.
• Extensive experience and knowledge in provisioning, maintaining and deploying applications across RHEL (6 & 7) servers, in addition to implementing automation tools throughout development, testing, staging, and production environments.
• Seeking a Systems Administrator position where I can challenge and optimize my technical experience configuration and maintenance of Linux based systems.

TECHNICAL SKILLS

Operating System: Red Hat Enterprise Linux (RHEL) (5,6,7), CentOS (5,6,7)

Hardware: IBM, Hewlett Packard, & Dell

Protocol: TCP/IP, UDP, FTP, HTTP, Telnet, Open SSH, NTP, SFTP & SCP.

Dev - Op: x Ansible, GIT, AWS, Docker

Network Services: NIS, NFS, DNS, & SSH

File System: Ext3, Ext4, & XFS

Application Server: NFS, NIS, SSH, FTP, Apache, YUM, RPM, & Kickstart

Virtualization: VMware, ESXI, vCenter, & vSphere

Network: DHCP, DNS, TCP/IP, UDP, LDAP, & TCPDUMP

Backup and Recovery: NetBackup

Database: MySQL

PROFESSIONAL EXPERIENCE

Confidential, NY

Linux System Engineer

Responsibilities:

• Installed configured and built servers using Kickstart/Jumpstart Images Servers included r240, r340, and T440.
• Performed common system administration tasks including but not limited to: adding users, configuring volumes, creating filesystems, configuring various system services, configuring software firewall, and monitoring system health.
• Managed day to day issues including daily health checks of applications and processes, working closely with end users, and development staff and Infrastructure teams to prioritize and resolve and mitigate outages.
• Established and maintained user accounts, file permissions, password, and account policies.
• Managed users and groups though a centralized directory for authentication.
• Worked on Security/Authorizations Created users with limited and full root privileges.
• Worked extensively with Network File System (NFS) for storage.
• Contributed to the evolving architecture of our Linux and storage services to meet changing requirements for scaling, reliability, performance, manageability, and price.
• Managed processes using tools such as TOP, VMSTAT, LSOF, TCPDUMP, NETSTAT, IOTP, and IOSTAT.
• Provided security to all servers through OS hardening, Patch management and Package management.
• Experience in Troubleshooting Hardware, Storage, Application Bottlenecks. System Recovery, Crash dump analysis and performance tuning.
• Configuring and maintaining networking related implementation and system securities using Security Groups, SSL Certificates, subnets, Internet Gateways, SSH keys, AWS Access/Secret Keys, Iptables, and different protocols such as SSH, HTTP, HTTPS and FTP.
• Experience in installing, configuring, supporting and troubleshooting Unix/Linux Networking services and protocols like NIS, HTTP, DNS, NFS, DHCP, NAS, FTP, SSH and SAMBA.
• Knowledge in setting up monitoring tools such as CloudWatch and Nagios to maintain various systems on different environments.
• Acquired knowledge of vulnerabilities, configuration settings and their exploitation in order to gain access to networks, applications, hosts, and desktops.
• Strong technical background in Storage, Disk Management, Logical Volume Management (LVM) and logical partitioning.
• Configured and managed physical volumes, volume groups, and logical volumes, in addition extended PVS, VGS, and LVS for file system growth needs using LVM commands.
• Patched critical servers with the help of Red hat package manager and YUM utility tool.
• Decommissioned small and obsolete servers and consolidated them into one large server.
• Worked on VERITAS NETBACKUP 6.0/6.5.
• Designed roles and groups for users and resources using AWS Identity Access Management (IAM) and also managed network security using Security Groups, and IAM.
• Used CloudWatch to monitor Alarms created for high CPU usage, stopped services and low space on system volumes.
• Configured AWS IAM and Security Group in Public and Private Subnets in VPC.
• Expertise in Installation, Configuration and Troubleshooting of VMware ESXI, and VMware vSphere 5.5 and vSphere 6.
• Familiar with backup and restore of VMware host server configuration, Virtual Machine backup, snapshot, P2V-V2V conversation with VMware converter 4/5 and with other third-party converters.
• Experience in Kernel tuning for optimization on RHEL 5.x/6.x/7.x etc.
• Troubleshooted and ran root cause analysis of system crashes.
• Created and maintained system documentation including logs, images, and written reports.
• Created and edited Standard Operating Procedures (SOP) and documented various performed tasks.
• Applied and upgraded OS patches in a multi-platform (i.e. RedHat/CentOS) environment on a regular scheduled basis.
• Developed and maintained cooperative and collaborative relationships with networking, storage, software development, and project management teams.
• Managed and deployed large-scale Linux server environments . Including administration, networking, deployment, security hardening, performance monitoring, tuning, production operations, and trouble shooting.
• Responsible for the maintenance of established Service Level Agreements with clients and partners including after-hours or on-call work as necessary.
• Contributed to the evolving architecture of our Linux and storage services to meet changing requirements for scaling, reliability, performance, manageability, and price.
• Collaborated with Level 2 and Level 3 teams when issues arose that required additional support. ( i.e. priority one issues).
• Dealt with TCP/IP, fault tolerance, disaster recovery, and lights out management.
• Automated tasks through Cron jobs and Ansible.
• Experienced in Docker container management like Docker images, registries, volumes, and repositories.
• Experienced in Ansible configuration and deployment; wrote Ansible playbooks to manage environments configuration files, packages, users, mount points, web applications, backups, and scheduling tasks.
• Administered and maintained source control management system through Git; created branches, tags, fixed merge issues, and managed Git repositories.
• Monitored and supported Linux System and troubleshooted enterprise-wide Apache web servers.
• Installed, configured and supported RAID 0, RAID 1, RAID 0 1, and RAID 5 and RAID 10.
• Set up hardware and software RAID levels to boost performance.
• Adhered to security team recommendations such as fire wall configuration, customizing ports for various services and application, and others.
• Hands on experience with ticketing tools such as BMC Remedy.
• Provided 24/7 on-call support for debugging or resolving issues.

Confidential, New York

Linux system analyst/Admin

Responsibilities:

• Setup PXE-Boot server with customized Kickstart files.
• Analyzed log files and deleted as necessary to free up space on the servers.
• Monitored Linux system performances using various commands like top, PS, VMSTAT, CPUINFO, FREE, AND IOSTAT.
• Managed and monitored network ports and traffics with netstat, route, iptables, firewall and traceroute.
• Secured Linux systems through configuring IPtables, firewall, and SELinux, along with disabling of root logins.
• Obtained knowledge of the different Raid levels in Linux.
• Setup a local yum repository on Linux servers.
• Installed and upgraded packages with the YUM and RPM utility.
• Created/removed users and groups on Linux systems.
• Setup cronjobs using Crontab.
• Transferred files between Linux and Windows server using WINSCP.
• Copied and moved files between Linux servers with SCP and SFTP commands.
• Hard-linked and soft-linked files on Linux systems.
• Made SSH keys for password-less access on Linux servers.
• Created backups of data using the Linux TAR utility.
• Have knowledge of Microsoft Office.
• Worked within teams on different projects.
• Maintained proper documentation of all the activities carried out during the project .