John Zakhar Email & Phone Number

New York, New York, Us

New York, New York, Us

New York, New York, Us

Managing linux datacenter deployment, design and instances in all aspects.Microsoft SQL Failover ClusteringNexus and F5 devices.Brocade fabric switchesAnd EMC XtremIO Storage arrays.

My responsibilities includeNetwork management of several Cisco 6509's, CSM, FWSM blades, and brocade icx platforms.Plan and implement new data center using fabricpath / Trill with 10G leaf's and 40G spines (Clos Fabric) (Brocade, Cisco, and Palo Alto firewalls with F5 Load Balancers)Maintenance of Search platform (crawler and search index)Modernization of monitoring platform with PRTG.Migration of existing datacenter under 6509 chassis to Nexus 93128Tx 9396TX's, Palo Alto firewall relaces the FWSM and f5 load balancers replace the CSM blade.

Ferndale, Mi, Us

I am the responsible party for an infrastructure that serves up 88 million page views a month and stores and updates 6TB of data. We span two data centers in active/backup mode, and are in the process of a BGP4 network deployment between both sites.We provide automotive dealerships with a portal to display their inventory, update website copy, capture and track leads, post custom specials and many other things! Some of my roles include and accomplishments: Server configuration design and deployment.Network infrastructure engineer.Code deployment.Monitoring of critical systems and performance statistics.Disaster recovery planning.Design and implementation of production networks at our offices and data centers. Design and expansion of a full mesh VPN system spanning two offices, two data centers, and Amazon's Virtual Private Cloud. Design of OSPF and BGP ; providing multiple links for each site, and fault tolerance for internal and external connections. Design of an auto scaling system in Amazon Web Services for a custom in house application. The application can scale to thousands of instances per server role, with everything auto provisioned from Amazon S3.I am also responsible for training new employees about our production systems and code deployment models.

Systems Engineer.Designed and implemented a high availability web cluster for real time online transaction processing. Designed and implemented monitoring system for above web cluster.Managed and Installed:2 Cisco ASA5510 (Primary/Standby w/upstream HSRP)2 Barracuda Load Balancers (Route Path, Clustered)16 total servers running various services (Apache PHP, Mysql Primary / Slave, MSSQL, Postfix, Heartbeat, SNMP, syslog).2 Automated power transfer switchesDesigned automated SSIS transfer service for sharing data to and from a Navision / Microsoft SQL ServerImplemented and certified Chase Payment Tech Online XML Stored Customer Profile / Reoccurring billing API. Took primary role in designing testing procedures for each component in the network to insure expected behavior in event of a failure.

Configured and maintained the web infrastructure inside amazon web services

Hired to modify VTigerCRM written in PHP/Javascript.I wrote modules to generate royalty payments to publishers, based off of summarized data given to us by wholesalers, or exported from QuickBooks.Extended the invoice system to allow for the use of hand barcode scanners.Extended the CRM application to meet business specific goals (MARC/ONIX) product record generation.Wrote XMLRPC Connectors to export and import data to and from VTigerCRM.Automated the invoice monthly summary retrieval system in PHP to download, process and resolve invoices for specific wholesale Distributors.Wrote stored procedures for mySQL to generate summary data to be used in the final Royalty Payment Report system.Designed a C++ application to batch generate PDF’s for each Publisher with sales data for each of their titles.Maintained and added to an Legacy website written in ASP (JavaScript inside the container).Administrated the IIS server the core site and database ran on.

Norwalk, Connecticut, Us

Unix System EngineerMonitor and tune, update and manage 30+ Redhat mission critical servers on a day to day basis.Design and implement enterprise backup system for all mission critical data.Resolved many open issues from DNS, to misconfiguration of LDAP and mySQL replication.Identify and resolve issues relating to greater than 1000 concurrent VPN connections to internal network from cellular connections.Modify internal web based monitoring system (PHP, PERL) to meet the needs of the company.Code drivers and bootstrap information for custom engineered embedded devices.

New York, New York, Us

Database abstraction layers in C++Worked on code for Windows custom self install process to jump start new company machines and apply security profiles.Profile existing code to find bottlenecks and problematic blocks.