SUMMARY:

• Seeking a Senior Linux Systems Engineer, High Performance Computing, Storage and Virtualization Administrator role in which to utilize, practice and expand my skills.
• Talented, results - driven Senior Linux Systems Administrator/Engineer with 21 years of versatile, cross-platform experience in systems/virtualization/storage/network architecture, installation, implementation, integration, security, and administration in local and remote environments. Comfortable working independently or part of a team as the leader or a contributing member. Solid foundation of exceptional customer service.
• Expert in Linux System Administration and Engineering.
• Expert in IP networking infrastructure.
• Expert in VMware Virtualization Administration.
• Able to maintain a reliable, logical and methodical approach to support and documentation.
• Strong communication and interpersonal skills, both written and verbal.
• Able to perform under time constraints with good judgment under pressure.
• Able to learn new material quickly.

TECHNICAL SKILLS:

Operating systems : Microsoft Windows Server, CentOS Linux, Red Hat Enterprise Linux, SuSE Linux, Ubuntu Linux, FreeBSD, MacOS, Sun Solaris, IBM AIX

Hardware Architectures : Dell, HP, IBM, Sun and Supermicro AMD/Intel x86/x86 64 based server chassis, ARM SBC

Network Service s: Active Directory, CVS (Subversion and GIT), ISC DHCP, DNS (ISC Bind and Windows DNS), FTP, HTTP (Apache and IIS), HTTPS/SSL, IMAP, IPDR/SP, IPMI, MTA (Sendmail, Qmail and Postfix), NFS, NIS, POP3, PXE, RADIUS, rsync, Samba, SFTP, SMTP, SNMP, SSH, Telnet, TFTP, WINS

Programming Languages : Modification and customization of C, CURL, HTML, Java J2E, JavaScript, Perl, PHP, Python, Bourne/Bash/C/Korn Shell Scripting, Windows Batch and PowerShell Scripting

Open Source Software (LAMP) : Apache, compiling software from source code (configure, make, make install), CUPS, GIMP, GIT, GNU (vi, sed, awk, grep, etc.), Installing and building software packages via RPM, Linux Kernel compiling, MySQL, Nagios, Nessus, PHP, PERL, PostgreSQL, Python, Postfix, Qmail, Sendmail, Subversion, Tomcat, VNC, vsftp, Zenoss, Zimbra ZCS

Commercial Software : Actuate Ad-Hoc and Interactive Reports, Blackboard Academic Suite, CheckPoint Firewall-1 and VPN- 1, IBM Tivoli Storage Manager (Client & Server), IBM WebSphere Application Server, Informatica PowerCenter, Microsoft MSSQL, Numara FootPrints and Track-IT, Splunk, Trend Micro VirusWall, and VMware vSphere, vCenter and ESXi, Zimbra ZCS

Security Technologies : Intrusion Detection Systems, Firewalls, VPNs, security policies, penetration testing, and encryption.

Management : Problem solving, Project management, System Design and Development, Budgeting, and Purchasing.

PROFESSIONAL EXPERIENCE:

Confidential

Senior Systems Administrator, Atlanta, GA

Responsibilities:

• Performing the role of Senior Systems Administrator and Engineer in many projects and serving as the main technology liaison for the Vice President of Operations, ETI software engineers, Tech Support Engineers, Sales Engineers and other team members of ETI.
• Working across technology domains to ensure the present and new infrastructure and systems meet business, technical, operational requirements for ETI and our customers.
• Working to implement ITIL (Information Technology Infrastructure Library) and ITSM (IT Service Management) frameworks as a best practice within ETI’s environment.
• Maintaining and supporting over 100 plus CentOS and RHEL (Red Hat Enterprise Linux) VMs (Virtual Machines) upon a VMware vSphere 6 cluster within ETI’s server rooms and off-site datacenter.
• Reviewing existing processes and recommending new solutions to provision, configure, support and update the ETI Linux baseline stack with best practices, compliance, security and standard policies.
• Inventoried, Audited and Documented all ETI server, network and workstation assets. This included recording all network devices (BYODs aka mobiles phones and tablets).
• Initiated, Designed and Implemented projects to allow better use of existing infrastructure. Mitigated security risks and closed gaps in security policies, processes and implementation.
• Worked on project to remove, decommission or migrate older systems to new virtualization environments or new physical hardware.
• Planned and participated in migration of existing corporate email system to Microsoft Office 365.
• Mentored and collaborated with systems administrators, tech support systems engineers and software development engineers in the practices, procedures and responsibilities. At the same time, learning, shadowing and practicing ETI’s related processes and procedures to become a more effective and efficient member of the team.

Confidential

Senior Linux Systems Engineer

Responsibilities:

• Provided financial application and infrastructure design and implementation support to Confidential Business Units.
• Performed as the Lead Engineer in many projects serving as the main technology liaison for the project manager, Confidential engineers, SMEs (Subject Matter Experts) and other stakeholders within the BU.
• Worked across technology domains to ensure overall design meet business, technical, operational requirements in addition to Federal regulation and industry compliance.
• Worked within the ITIL (Information Technology Infrastructure Library) and ITSM (IT Service Management) framework adopted by Confidential . Worked with other Confidential Technology SMEs to organize, design and present an EEP (Engineering Excellence Program) presentation to a core team of peers within Confidential .
• Participated in ERB (Engineering Review Board) and EAB (Engineering Architecture Board) to peer review and discuss CRQs (Change Requests), Implementation Plans with back out plans, pre-EEP presentations and proposed implementation tools and processes from the Confidential team.
• Maintained and supported over 10,000 plus RHEL (Red Hat Enterprise Linux) VMs (Virtual Machines) on VMware clusters in many datacenters throughout the United States.
• Utilized Confidential (Hewlett Packard Server Automation), OEM (Oracle Enterprise Management) and Red Hat Satellite provided by the Confidential (Enterprise Service Management) platform delivery team to provision, configure, support and update the Confidential Linux baseline stack with best practices, compliance and standards.
• Recorded, reviewed and documented the onboarding process for new Linux engineering within Confidential 's Confidential environment to call out gaps, revise process and to improve time to becoming a successful, productive and efficient member of the team.
• Contributed, collaborated, designed, planned and executed on many projects as the Lead Engineer with project managers, network, security, storage, virtualization, database, monitoring engineers. Engaged BU project and program managers for requirements, scope and costs to deliver on time and to mitigate risk.
• Worked on projects to remove tech debt via decommissioning and migrating older systems to new environments. Facilitated design and documentation for an onboarding project to allow a customer to provide International ACH to their banking customers. Collaborated with existing senior Linux engineers to design, test, plan and integrate existing fax and email facilities with a chargeback application for the card services BU.
• Mentored junior Linux systems engineers and senior UNIX engineering in the practices, procedures and responsibilities. At the same time, learning, shadowing and practicing Confidential related processes and procedures to become a more effective and efficient member of the team. Maintained annual Confidential and Confidential training for compliance and security.

Confidential

Senior Scientific Systems Administrator, Atlanta, GA

Responsibilities:

• Installed, configured and upgraded the VMware vSphere, vCenter and ESXi hypervisors from versions 5.x to 5.1 and 5.5. Utilized vMotion and vMotion Datastore to facilitate upgrades and maintenance to keep the guest systems up and available to not impede the scientific workflows or deadlines.
• Configured LACP on Dell Force10 10GbE switches and VMware distributed switches to facilitate high availability over the redundant 10 GbE infrastructure. connections from the virtualization hypervisors to the high speed NAS for the NFS datastores.
• Configured Dell iDRAC (integrated Dell Remote Access Controller) via OOB Ethernet network on each physical server. Utilized IPMI commands and tools to image and provision Aspen GPU HPC nodes after Linux distribution security and errata, GPU kernel module rebuilds, Infiniband kernel modules and/or Nvidia CUDA library updates. Worked with SciComp team to move the HPC primary OS from RedHat Enterprise Linux to CentOS to save on entitlement and support costs.
• Collaborated with SciComp team members to bring our operation and administration to a higher level of maturity. This was achieved through peer review, process documentation, ticket curation, cross-trainings of skills and supporting the CDC's scientific mission. The SciComp teams’ efforts allowed us to achieve a designation as a Center of Excellence and a standard within the CDC for Scientific Computing.
• Obtained Department of Health and Human Services (HHS) Security Clearance/National Agency Check (NAC) for employment. Maintained annual HHS, CDC and SRA training for compliance and security.

Confidential

Senior Linux Systems Administrator, Atlanta, GA

Responsibilities:

• Worked on installation and configuration of RHEL 5.x on IBM 3550 and 3650 servers with Confidential ’s standards and environment requirements for the Applied Broadband Pipeline implementation of IPDR/SP. Knowledge of PostgreSQL, python, Sendmail, RHEL and bash scripting facilitated a consistent environment for this implementation.
• Configured snmpd for monitoring via Zenoss. Configured syslog-ng to work with Splunk implementation at Confidential . Configured and registered servers with Spacewalk for centralized Configuration Management. Configured OOB (Out of Band) via serial connection on each server to Logical Solutions SCS servers.
• Configured IBM RSA (Remote Service Adapter) via Ethernet on each server to switches.
• Collected information for out of warranty servers to select P2V candidates from Confidential internal inventory databases and vendor databases via scripts to produce lists. These lists were then sorted and evaluated with the stakeholders and project manager to make a determination for each candidate. The criteria were based on status of use, hardware replacement, hardware consolidation and performance metrics.

Confidential

Senior Linux Systems Administrator, Atlanta, GA

Responsibilities:

• Worked on SA Team to migrate primary Atlanta data center to Dallas disaster recovery data center to facilitate moving the primary from mid-town Atlanta to Suwanee, GA. Worked with Confidential IT department team members to plan, architect and execute our move in 4 months.
• Performed tasks with members of the Confidential IT department to switch Confidential 's primary data center services and duties from the Dallas data center facility to the Atlanta data center facilities. Worked with Confidential IT department team members to plan, architect and execute our move in 6 weeks. The execution was over a 12 hour window over a weekend to mitigate issues with production in the field.
• Documented, tested, planned, mentored and implemented a Zimbra ZCS 4.5.x/RHEL 4.x to ZCS 5.x/RHEL 5.5 to ZCS 6.x/RHEL 5.5 upgrade solution to complete a primary phase in Confidential ’s plan for redundancy and scalability.
• Designed, tested, improved and implemented a custom application server solution of apache, mod jk, tomcat and c3po running on CentOS to replace an expensive IBM Websphere implement ion. This reduced the cost of $18k license per core per server with four cores times thirteen servers.
• Implemented IBM DB2 9.x on RHEL 5.x platforms to facilitate the Confidential data warehouse migration from PostgreSQL to DB2. Worked with DB2 DBAs, Storage Systems Administrators and Network Operations to facilitate the provisioning of the redundant and scalable servers. This included setting up bonded network interfaces, dual Fibre Channel HBAs, and MPP for systems redundancy. IBM distributed the Qlogic Linux kernel modules and IBM MPP Linux kernel modules as source code. I documented, tested and implemented the Confidential process for these technologies.
• Completed hardware and software updates in Suwanee data center to facilitate plan to switch back our Atlanta data center as primary. Also planning to promote both data centers to ‘Active/Active’ in the near future.
• Performed mail server migration from a Gentoo Linux/Postfix/Courier IMAP open source e-mail solution to an implementation of Zimbra Collaboration Suite 4.5.x on RHEL 4.x.
• Designed a Zimbra ZCS 6.x/RHEL 5.5 Clustered solution for redundancy and scalability.
• Developed, documented and implemented WYSE Linux thin clients as POS solutions for our stores.
• Migrated all Linux systems from Gentoo, Slackware, Fedora Core and RHEL 2.1 to CentOS 4/5 or RHEL 4/5 for ease of administration and security.
• Maintained over 150 servers at Confidential ’s two data center and corporate office remotely and on-site via command line shells, putty and shell scripts written in Bourne, BASH, Korn, PERL, Python and Microsoft batch files. Implemented MySQL replication between servers in both data centers for redundancy, scalability and disaster recovery. Scheduled via CRON or Scheduled Tasks.
• Mentored junior and intermediate Systems Administrators, Network Administrators, Development staff, Database Administrators and Help Desk personnel in many technologies and procedures