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Linux System Administrator

Location:
San Francisco, California, 94122, United States
Posted:
January 22, 2018

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Resume:

Mark Pliner

(US Citizen)

ac343n@r.postjobfree.com

San Francisco, CA (US Citizen)

Linux System Administrator. AWS System Administrator / Middleware - looking for a contract or a full time opportunity.

Skill Set

Handling some of the highest internet web traffic in the world (Petabytes) via Akamai, AWS ELB’s, Varnish and memcached.

Supporting the following stack end to end: Apache, PHP (Tomcat, Jboss, Jetty, Java standalone), MySQL (Oracle /MSSQL / MongoDB)

AWS: LaunchConfigs, AutoScaleGroups, AMI, Snapshots, EC2, RDS, Route 53, S3,ELB’s, VPC

Web Servers: IIS 2000-2008 / Apache 2.211-2.4.29 (Mod_JK/AJP, Virtual servers)

Application Servers: Jboss, Jetty, Tomcat, Websphere

Databases: Managing Mysql on EC2 and RDS; MongoDB, Oracle and MSSQL on EC2

Monitoring: DataDog, NewRelic, Nagios, Monyag, Mongo MMS, CA Wily Introscope

SSL: OpenSSL, keytool, ikeyman, WildCard / SNI Certs

Authentication: keystore / truststore, SSO (Single Sign On) Quest Vintella with Active Directory Integration, AD 2003/2008, LDAP

Operating Systems: Amazon Linux, CentOS, RedHat Windows

Hardware: Dell R610-750 / Sun Servers & HP blades, Foundry F5 Load Balancer, Cisco 2800, 2960, Google WebCrawler.

Automation: Repliweb, Sun N1, BASH / Perl Scripting / Ansible

Work Experience

MPX Consulting – San Francisco – Bay Area (Jan 2016 – Current) – System Administrator

Supporting 3 tier architecture in AWS and physical servers. Apache - Tomcat/Jetty/ JBOSS/ - Mongo /Oracle /MySQL. Linux / RedHat / CentOS /Windows 2008 Server. Daily support tasks include: patching every tier; Linux security patches, tuning Linux parameters based on application requirements; patching java and configuring java environment; tuning / hardening Apache Web Server and middleware application servers; working with F5 and AWS load balancers; application deployments; new server builds and cloning; monitoring all 3 tiers via custom scripts (through cron), Datadog, NewRelic, Nagios, PagerDuty. Worked with Percona, AWS and RedHat tech support. Participate in weekend and afterhours team scheduled tech support.

Ziff Davis Publishing (www.ign.com, www.askmen.com + many other www’s) San Francisco office - SysAdmin Engineer (May 2014 – Jan 2016)

Upgrading MySQL to 5.6 on EC2 and RDS. Migrating 50+ Mysql DB’s from physical and EC2 to RDS. Converting MyISAM to INNODB, replication and backups of MYSQL. Adjusting MYSQL parameter groups (mycnf) Participate in deployment process via GitHub, Image creation, ASG’s and Launch Configurations. Break / fix script creation using Bash, Perl, Curl for memory leaking apps. Setting up DataDog and NewRelic agents. Configuring monitoring consoles for monyag, mms.mongodb.com, DataDog and NewRelic. Java updates to 1.8. Creating Amazon Linux and CentOS AMI’s via Chef and Packer. Patching EC2 and RDS instances. Linux administration. Tomcat / Jetty and standalone Java applications support. Apache config. Creating ELB’s and handling Route 53. Documentation. Point person with Percona and AWS Platinum Tech support. Akamai configurations and cache purging. MongoDB replica set configurations. Participating in PagerDuty rotations.

Federal Reserve Bank of San Francisco (2012-2014) – Senior Middleware Administrator – Project Lead

Implemented cron jobs, scripts and monitoring tools to proactively manage Java applications. Architected load balanced 3 tier application infrastructures. Supported applications and server migrations between application server (java) versions and data centers. Created security checklists for Apache / Tomcat / JBOSS servers. Daily tasks include deployments of various J2EE applications to JBOSS, Tomcat, Websphere in QA / PROD environments. Application server installations, patching, security and upgrades. Design of high availability platforms using load balancers and application server vertical and horizontal clustering. Designing and configuring domains for JBOSS server farms. Deployments with Puppet. Keeping Apache robust and secure with certain modules compilation in to httpd core. Deploying content via RepliWeb. Creating Unix scripts on as needed basis, cron jobs, startup scripts and services. Monitoring and adjusting JVM’s. Log4j. Session draining and replication during deployments. Teamforge stack migration to version 6.x via Rsync. Pgdumps for Postgress database, TF and SVN server maintenance. Tomcat installations and deployments also compiling additional libraries. Creating jksstores with keytool, using ikeyman for Websphere, OpenSSL for x509 certs. Installing additional Linux libraries via rpm and yum. Configuring IPTABLES. Various application backups and log collections. Application statistics via CA Wily Introscope. Documentation. Data virtualization with Cisco’s Composite product and LDAP configurations.

Merrill Lynch / Bank of America (2010 – June 2012) – San Francisco / New York – Web App Deployment – Project Lead

Hands on leading following projects:

90 .Net Application migration from Windows 2000 – 2008 platforms (.Net 1.4 – 4.0)

Data center migration (Applications)

Established and managed Amazon cloud Dev and QA testing environments

Supported monthly application releases to production and disaster recovery sites IIS and Apache via Altiris, Repliweb and Perl scripts. (80+ of 2003/2008 servers and 40+ 5.3-6.2 Redhat 64bit Apache servers) Nagios and ITRS alerts and monitoring – configuration and troubleshooting. SSL client and server side cert management.

Troubleshooting web traffic end to end with: BIG IP, VIP Load Balancers, Siteminder. (httpd.conf maintenance). Close interaction with networking team on DNS and Firewall configurations based on App requirements. Achievements: Reduced new hire “catch up” time from 1 year down to 3-4 months, through automation, scripting, documentation and reassignment of team member responsibilities.

Verisign Inc. (Dec 2008 – Aug 2010) – App Deployment Web Infrastructure Support – Project Lead

Responsible for supporting HYPERLINK "http://www.verisign.com/" www.verisign.com site + 60 other sub / www sites which are hosted on Apache & IIS platforms. These are e-commerce sites with 80+443 traffic and 200,000+ unique hits daily. Responsible for providing 99.99% uptime on WWW platform. Also daily tasks include management of Foundry Load balancers, Disaster Recovery Web Farm, web content push via Repliweb, monitoring Web servers via Nagios and Keynote. Responsible for deployment of new MS IIS servers & Apache 2.215 with Virtual Servers. Administrating Web logs via RSYNC, SPLUNK. Supporting ASP, Java + PHP written Web content. Perl scripting as needed. Responsible for data center migration of the Web Farm to a new location without service interruption. Active Directory implementation across 14 silos and 2 tier domain structure. Repadmin / Repladmin/ ADSI Edit Vmware ESX 3i clusters installation and administration across 3 silos. Linux / Win2K3 Virtual machines templating. EMC NS 480 SAN. Unix authentication via AD + Quest/Vintella. Deployment automation via Sun N1 provisioning system and BladeLogic. Citrix, Symantec Antivirus and WSUS server deployments. Windows 2008 Server Build and Read-Only domain creations. Wise packaging and VB scripting. Participating in the project of a complete move of AD infrastructure and applications from Mountain View data center to East coast. Extensive collaboration with networking group on all firewall requirements for AD replication and various applications connectivity on Microsoft and Linux platforms. As part of Application Deployment team - responsible for working with QA & Dev teams on the release lifecycle. Networking & Authentication : DNS, TTL, TCP/IP, Canonical Names, C-Names, AD implementation across 14 silos with 2 tier domain structure, Quest / Vintella – Unix Authentication via AD. Storage: EMC NS 480 SAN, iSCSI Vmware: Esxi 3.5 Server deployment in 3 clusters with HA, DRS. VSphere4 implementation. Automation: Sun N1 provisioning system and BladeLogic.

UCSF – California Poison Control - Emergency Call Center (April, 2006 – Dec. 2008) – Sr. System Administrator

Supported all IT infrastructure aspects of the organization which included: 100+ desktops and 30 servers. Infrastructure spread out across 5 locations in California working in 24x7x365 mode. Working with Vnware Workstaions and servers. MS 2003 servers. Budgets, Software Inventory, Vendor Management, SLA, Policies and Documentation: Software and hardware purchasing through CDWG, Software and Hardware Inventory, Service Contract renewals and management. IT 1 year and 5 year budgets creation. Documentation on all software / hardware installs and upgrades. Established Service Level Agreements and created service procedures.

Insight Global, San Francisco, CA (September, 2004 – April, 2006) – Sr. System Administrator

Project oriented installations and support of Fedora 5, Red Hat 9, AS (64Bit) & ES, VMware GSX/ESX guest/host OS and virtualizations. Implementation and configuration of Nagios with 100 servers and close to 400 services monitored. Windows Server 2003 R2-64Bit – policies, security plan, installation and implementation. Symantec Antivirus, Ghost, Visio Diagrams of Server Farm. Worked with following: Software: VMware ESX Server, P2V, Virtual Center, VMotion, Windows Server 2003, XP, Nagios, SQL Server 2000 /2005, IIS, .Net, Ghost, Red Hat 9, AS (64Bit) & ES, Visio, Microsoft Cluster Server,, MS Project, HP Insight Manager.Hardware: HP ProLiant Servers DL380 G5 /G4, DL385 G2, DL560, HP MSA 1000 SAN, HBA, Cisco /HP Fiber Channel Switch, Dell PowerEdge 2900+. iSCSI SAN from Dell, DAS storage, Dell PC's, IBM, Toshiba, Dell, HP laptops, external disk and tape systems.

EFI (Electronics for Imaging) –Foster City April 2000 - April 2004 - Senior Tech. Lead – Oracle DBA /SAP Basis Admin

Oracle DBA from small (15 GB) to large (1 TB) databases (RDBMS) using OEM, ONAMES, RMAN, Quest TOAD, etc., planning, tuning, monitoring, security, logical & physical data management on Sun Solaris, Linux, and Windows systems. C shell and Corn shell scripts, back-up scripts, cron scheduling. Install and Configured Oracle 7.3.4, 8.16, 8.17, 9i & 9iR2 databases on Windows, Sun & Linux Platforms. Created Schemas, Users, Roles, and Managed Sessions through profiles. Used Oracle Enterprise Manager and created oracle management server. Installed and configured databases on Windows 2000 server, Sun 5.7 & 5.8 servers, RHEL. SAP Basis Admin ver. 4.6D

Kaiser Permanente July 1997-April 2000– Oakland – Senior System Administrator.

Contracted as an NT implementation and support technical lead. Implementation of Microsoft Cluster Servers, BDC's, NT member servers and workstations. SQL 6.5 and 7.0 servers' installation, database maintenance and fine-tuning, security set-up, bcp, SQL backups. Oracle 8 client on NT, Oracle client on NT to Unix back end connectivity. Oracle database back-ups. SMS packages - created and pushed out. Workstation registration with SMS server. SMS Inventory. Ghosted NT builds to create images. EDM image distribution mechanism, Automated NT builds. Worked in a large TCP/IP multi segmented and routed environment with thousands of users in multiple locations. Supported a developer LAN/WAN environment with Cisco 2500 and 1600 Series routers and software packages such as Lotus Notes, NFS Maestro, Exceed, Samba, SNA Server, NT 4.0, Vantive Client, ABT Time Reporting, Hyena, Oracle, MS Office Suite 97, MS Access, C++, Visual Basic, Java, HTML, Active X, MS Project 98, IE 4.01, I.E. 5.0., Visio 5.0, SMS administrator and others. Configured and troubleshot Compaq Deskpro workstations, Compaq rack- mount servers and other hardware.

EDS at Philips Semiconductors account 1993 – July 1997 – Sunnyvale, CA - LAN Administrator

NT Administrator in 162 server / 70 subnet environment with 2,500 users. Daily operations include troubleshoot and support the following: Wins, TCP/IP Connectivity, Rsh-telnet-ftp from X-Terminals to PC's, NFS Maestro, DNS, Host tables, mail routing, Netscape via proxy's, NT 4.0-Win95 dual boot workstations, CC-mail, Exceed - PC X-Terminals emulation software, Reflection X, Apples via TCP/IP, Netware gateways from NT servers, security and user account creations.



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