SUMMARY:

• Experienced System Engineer with a demonstrated history of working in the medical, technology, and financial industry. Skilled in Enterprise Class Linux, AIX, clustering, IT Service Management, Business Continuity and Disaster Recovery.

PROFESSIONAL EXPERIENCE:

Confidential

System Engineer III

• Deployment of RedHat and Oracle ULK LINUX hosts in VMWare environment
• Configuration of Satallite/Cobbler/DHCP/PXE environment for LINUX deployment
• Migration from Satellite 5.8 to 6.3
• Development of GUI (“screen” based) Cobbler environment for VMWare LINUX guests deployment
• Creation of zero downtime backup solutions with SAN FlashCopy/ShadowImage for AIX
• Integration of UNIX user authentication with Active Directory LDAP/SSL/Kerberos
• Deployment and management of Satellite 5.x and SpaceWalk servers
• Initiated migration process to Satellite 6.3
• Development of LINUX/AIX Patching process
• Implementation of Patching/Venerability (SCAP) WEB based reporting for LINUX machines
• Evaluation of SPLUNK/ElasticSearch + Kibana with MetricBeats for log mining and performance monitoring.
• Daily system administration / maintenance of over 70 AIX and 200 LINUX hosts.
• ParallelSSH, PowerShell, ANSIBLE, Puppet 4, Satellite 6.

Confidential

AIX SYSTEMS ADMINISTRATOR

• Study requirements / Recommend new hardware and software solutions for the growing enterprise.
• Configuration/Setup/Administration of HACMP/Classic, and HACMP/ES clusters with AIX 4.3.x, and 5.3.x, Concurrent and Non - Concurrent Resource Groups.
• Development / Implementation of HACMP startup/shutdown scripts.
• Implementation of IBM BladeCenter with JS20 Blades, hosts migration to Blades (JS20).
• Implementation/Configuration/Maintenance of SSA and SAN storage - disk groups/luns/zones on HITACHI 9570 THUNDER SAN. Development of SAN storage procedures and policies.
• Administration of SAN fabric with McDATA 4750 switches.
• Developed and implemented procedure to move servers with live data from SSA based storage ARRAYS to SAN environment - zero downtime.
• Operating system upgrades from AIX4.3x to AIX5.3
• Integration of new machines, migration of applications and whole hosts to new hardware platforms.
• Perl scripting for migrating spooling subsystems, creation of user accounts, system monitoring, disks mappings, file systems layouts, etc.
• When system growth translated into backups requiring more then 12 hours developed (Perl) backup procedures using the “SplitLvCopy” and the ShadowImage mechanisms reducing the time the system is not available to three minutes.
• Investigation / recommendation of a backup library ending with selection of the IBM3590 with SAN attached tape drives controlled with the TSM software.
• Users / printers administration and management.
• Configuration of name resolution services, network time synchronization, nfs services, etc.
• Hardware installation and maintenance, installation of application software and associated packages.
• Performance / systems tuning.
• Administration and maintenance of CACHE database with EPIC medical system.
• Installation / Configuration of applications like LAWSON, SAP, ORACLE, SYBASE/Neon .

Confidential

UNIX ADMINISTRATOR / Application Environment Support

• Support of Celestica/WebSphere/SiteMinder and FirstWave production environments: transfer of files from/to the testing/staging/production machines.
• Installation/Configuration/Administration of WebSphere MQSI /CandleNet eBP products.
• Netegrity SiteMinder custom API development - Solaris/gcc compiler.
• Writing Korn and Perl scripts to automate mundane and repetitive tasks. Developed log extract tools, scripts for global “search/replacement” of tokens from *.jar files including password fields.
• Modification of unix system utilities like vmstat to include time at each line of output.
• Migration of telemarketing environment from HPUX/Informix to AIX/SP/Oracle, developed migration scripts, etc.
• Installation and configuration of iPlanet Directory Server ver.4.12/16 in the “native” mode with full NIS functionality (authorization/authentication/NFS/Automounter) through LDAP.
• Problem resolution, support.

Confidential

E ROLE: SENIOR UNIX ADMINISTRATOR

• Study requirements / Recommend new hardware and software solutions for the growing enterprise.
• Saved the County over half a million dollars scheduled for purchase of the new hardware selected to overcome the poor performance of the existing GIS (ESRI) system. Using the standard UNIX performance/diagnostics tools identified the source of the poor performance and upgraded the existing SSA hard disks subsystem with a dual channel SAA RAID controller. I created a new data layout for both the ESRI (GIS) and Oracle applications creating mirrored striped volume groups with logging volumes on dedicated disks not associated with the data disks outside of the SAA subsystem. The saved financial resources were later used to purchase several H70 and H80 RISC machines for the COURTS system.
• Upgraded the boot PROMS of 7043 workstations and migrated the existing RISC machines from different versions of the AIX operating system to a uniform consistent level of 4.3.x using the NIM mechanism.
• To further conserve network and server utilization abandoned usage of NFS and created AutoFS (Automounter) environment. Implemented file system access between WinPC and AIX servers with SAMBA software.
• Overhauled the existing NIS structure of a single NIS server and many NIS clients into a new one consisting of one NIS Master and many NIS Backup Servers to minimize then frequent blackouts due to then low network reliability.
• When the time came, followed the upgrade to the networking plant with upgrade of all UNIX machines to 100mbps technology, and later to 1Gbps fiber.
• Reorganized the backup procedures of GIS production server so the backups of its volume groups, and the bootable backups of its rootvg where created nightly.
• To provide short response time to users requesting restoration of deleted/modified files installed/upgraded the Legato Storage Manager for UNIX using a dedicated SCSI controller and a jukebox.
• Installed/upgraded the ESRI software modules and the license manager.
• Assisted in resolving of user encountered problems in the AIX/ESRI environment. Installed and configured new color plotters and printers.
• As the part of the County global environment change instituted the DHCP and the NTP protocols on RS6000 and SPARC machines.
• Developed procedures consisting of several Korn shell scripts and few lines of C code to allow GIS extract files (several gigabytes of data) to be delivered to a BANYAN server for countywide distribution. The last process was further redefined as the part of migration from BANYAN to WIN2000 environment.
• Frequently, I was called upon to help in resolving of performance issues related to the database employed by ORACLE database.
• Installed and configured the 911 system using the existing SPARC 1000, and T3 array subsystems.
• Configured the VxVM, and the VxFS to improve 911 system resiliency and responsiveness.
• Implemented backup procedure for the SUN environment using VxFS “snapshot”, and ufsdump/restore mechanism.
• Installed the TIVOLI FRAMEWORK ver3.4 and NETVIEW6000 diagnostic tools with the SIA agent running on the RS6000 machines to reduce the effort associated with monitoring of UNIX environment.

Confidential

UNIX SYSTEM ADMINISTRATOR / PRODUCTION SUPPORT

• Provided support for various banking activities like trading, financial reconciliation, and in-house system development groups.
• Monitoring of logs, file systems, and systems performance.
• Responsible for UNIX infrastructure in a shared 24/7 environment.
• Installed new servers, operating system and Sybase packages and patches.
• Installed/Monitored Veritas Volume Manager, and Solstice Disk Suite.
• Diagnosed software/hardware problems, and worked toward their resolution.
• Evaluated/Recommended system monitoring tools like CA UNICENTER, HEARTBEAT, TIVOLI DISTRIBUTED MONITORING.
• Evaluated/Recommended new SUN hardware storage devices.
• Participated in the 2000K efforts.

Confidential

LEAD SOFTWARE ENGINEER / MANAGER SOFTWARE SUPPORT GROUP

• I managed a group of eight responsible for providing development environment for the software department developing Analog/Digital Cable/Satellite Audio/Video Distribution System software. This environment consisted of a software laboratory, production servers, and software developers systems accessible from home or office. It also included world wide software distribution and the software version control.
• I designed and implemented the Software Lab composed of analog and digital head-end equipment, over two dozens of SCO Unix and Interactive UNIX TV transmission controllers, network switches and Cisco, and BayNetworks routers.
• As the development software increased in functionality and size the existing “make” servers architecture was overpowered, and the compilation process extended to several hours. I was called upon to design new architecture that could reduce this process and also that could provide more reliable and robust development environment. I designed the new system using the mixture of computers based on the INTEL and SPARC architecture. The SPARC machines with VxVM and VxFS installed were used for storage of the program files (C/C++), and to execute the software management and the software design tools like CADRE/TeamWork, Aid de Camp ClearCase. The “make” machines, which were INTEL/Pentium based, were connected to the SPARCs using dedicated network adapters connected to 100mbps switches made by CISCO to provide good NFS performance. This performance was further increase by installing operating system independent, multi-channel RAID controllers and hard disk subsystems with considerable amount of battery backed caches. Software developers accessed this environment via dedicated network adapters, not the same adapters that were used by NFS. Needless to say, the “make” time was reduced from two (2) hours to less then fifteen (15) minutes. In the same time, more then one “make” job could be executed without any noticeable performance degradation.
• As the new development systems were put on line, a parallel effort took place to provide failure proof environment for existing older servers that could not be retired due to the customers requirements. This was solved using either a DPT Raid controller, or an operating system independent RAID controller.
• To provide software engineers with the ability to develop from anywhere and at anytime, the dial-up servers and routers were put in place.
• CISCO and BayNetworks routers were used to divide the networking plant, and to separate the laboratory, “make” servers, and general usage areas.
• To provide reliable backup services the “server” room machines were equipped with backup devices attached to dedicated SCSI controllers. The “snapshot” mechanism was investigated and used where it was available (SOLARIS).
• Operating systems: SOLARIS 2.5 with Veritas Volume Manger and Veritas File System, INTEL/SOLARIS 2.5, 2.6, SCO UNIX ODT 3.2, INTERACTIVE UNIX 3-4.x, AIX 4.1.x, LINUX, and Windows95.
• I designed the connectivity/authentication/file system access environment using the NIS/NFS and where possible AutoMounter configuration.
• To provide the most flexible and efficient printing/plotting tools I used a RISC machine running AIX, which was employed as the print/plotter server.
• Often, I was called to provide connectivity solutions between our department and parts of the Company located inside or outside the USA. This involved a lot of human interactions and quite frequent modifications to the routing tables of our own routers.
• With time the sales level increased, and the existing software duplications machines were not longer adequate. I designed a 1/4in. tape duplicating machine based on a Pentium386i, Adaptec SCSI controller and four (4) tape drives which drastically cut the production time. The commercially available diskette and CD duplicators which where purchased as well.

Confidential

SYSTEM ADMINISTRATOR

• I provided computing infrastructure services of a software company that developed and maintained the software managing phone communications of the US government, and the software providing the credit research and analysis for commercial customers.
• Shortly after joining the company, I redesigned and unified the existing three networks (Token Ring/Ethernet) into one with the help of SMC 10BaseT and HP media converters
• The development environment consisted of a mixture of UNIX flavors like AIX 3.2.5, HPUX 3.5 SunOS 3.1, SOLARIS 2.3, and ULTRIX 4.1. The programs files were maintained on an INTEL based server with NETWARE 3.11.
• I integrated the UNIX connectivity to and from WIN3.11 development workstations using commercial implementation of X11 servers for Windows like for example Hummingbird, Wollong, B&W, IBM, etc.
• The company printing problems was solved using TCP/IP and IPX/SPX networked print servers.
• As the business situation required the Company to allow remote access to certain devices, and programs, I installed and configured the ASANTE communication servers.
• I also maintained and was responsible for a RS6000 system with dual T1 adapters used for credit data access from various commercial credit organizations.