SUMMARY

• Seasoned Systems Engineer with expertise in network architecture, automation, monitoring, data center management with focus on optimizing network/system uptime and continuity.
• Demonstrated record of success in proactivity, security and infrastructure strength.

TECHNICAL SKILLS

Operating systems: Red Hat, Novell, Centos, SUSE, Fedora, Ubuntu, Cisco IOS, Windows, Mac OSX

Virtualization: VMware ESX, VMware Server, VMware Infrastructure, vSphere, vCenter Converter, Citrix XenServer, XenEssentials, XenConvert, Alike,Citrix XenApp, XenClient.

Automation: Puppet, Geppetto, Bash shell scripts, DOS scripting, Python, VBScript.

L3 Switches: Cisco Catalyst, Force10, HP, Dell.

Firewall/Load Balancers: Cisco, Juniper, Kemp, Sonicwall, Watchguard, Fortigate, iptables, SElinux

SAN/NAS/DAS: Equallogic, Netapp, Dell attached storage, Meridian iSCSi, OpenFiler

VPN: OpenVPN, Cisco, Sonicwall, Microsoft L2TP/PPTP.

Messaging: Exchange, BES, MailShadow, EMC EmailXtender, Ontrack, Kernel

SPAM: Mailcleaner, Barracuda, Appriver, GFI Mailessentials.

Databases: Microsoft SQL Server, MySQL, Oracle, Access, Paradox.

Failover/Replication: NeverFail, CCR, DFS - R, DAG, Windows Clustering.

Software Industry: Puppet, SVN, Jenkins, Nexus

Monitoring Tools: Nagios, MRTG, RRDTool, Cacti, OSSEC, Jmeter, NetWrix, SpiceWorks, Zenoss, Nessus

Image Software: Acronis, Altiris, Clonezilla, Ghost, Tom Ehlert Snapshot

Virus Protection: Eset, Symantec client/Exchange, Trend Micro, AVG, Comodo, Kapersky, Sancuary, Avant

Content Management: SharePoint, Twiki, Deka Wiki, Joomla, CRELoaded.

Web Services: Apache, Nginx, IIS, Weblogic

PROFESSIONAL EXPERIENCE

Sr. Systems/Network Engineer

Confidential - Norwalk, CT

Responsibilities:

• Responsible for the ownership and strength of the entire infrastructure within a mixed dynamic environment.
• Procured, engineered and implemented a new data center and migration of production systems.
• Built and fully managed an environment of 90% Linux, 10% Windows within a fully virtualized environment.
• Automated my systems to rapidly deploy configurations and maintain standardized environments.
• Implemented proactive monitoring system using over 400+ configured checks.
• Engineered and implemented a fully redundant network consisting of L3 switches, Load Balancers, Firewalls and SANs
• Provision, implemented and critiqued many firewalls including ACL's, NAT policies.
• Implemented new messaging systems involving Exchange DAG clustering, backups, BES and Spam Services.
• Implemented a large scale virtual environment involving high availability, SAN traffic, load balancing and pooling.
• Built, implemented and manage company's software Linux stacks involving DEV, QA, CA and Prodenvironments.
• Build and manage a large 90% Linuxenvironmentranging from company's software stack to core infrastructure.
• Member of internal security group, represent infrastructure and work to heighten securityand fix security issues
• Fortify network security, identify security flaws and audit to secure the edge, systems, networking equipment and users.
• Fabricate various SAN technologies involving presenting to virtualized systems, mounting LUNS, iSCSI and NAS uses.
• Configure and implement VPN secured tunnels with ACL's between data centers and customer's data centers.
• Introducedcentral shell script server to manage our Linux servers to simplifynumerousmanagement tasks.
• Introduce many open source applications to assist in managing core infrastructure or for core business use.
• Built new data center including purchasing, conceptualizing, configuring redundancy and migrating production.
• Implemented redundant edge load balancers for various servers including web, apps, databases, mail etc.
• Implemented redundant L3 switches, introduced new subnets, new VLANS, iSCSI traffic and routing of these networks.
• Configured, implemented and managednumerousAmazon EC2 instances, S3 buckets, Cloud Front and RDS databases.
• Diagnose server hardware issues, RAID configurations, bottlenecks and monitored fault tolerant hardware/software.
• Establish many policies, redundancy plans, monitoring/notification systems and best practices for the network.

Systems Engineer

Confidential - Stamford, CT

Responsibilities:

• Responsible for the ownership and strength of the global network infrastructure in a mixed dynamic environment.
• Engineered network infrastructure via layer2/3Cisco appliances to accommodate a new subnet, routing and WAN block.
• Provision and critique a variety of firewalls including access lists, nat rules and joining office networks
• Engineer messaging systems involving DAG clustering, implementing and upgrading Exchange, BES and Spam Filters
• Engineer a variety of large virtualized environments involving high availability, SAN technology, pooling and motion.
• Build and manage Linux environments for spam, web, databases, FTP, VPN, routing, lamp, storage and monitoring.
• Fortify network security, identify security flaws and audit to secure the edge, systems, servers and users.
• Fabricate SAN technologies involving network and direct attached storage for virtual environment and storage needs.
• Introduce file replication services via WAN replication for fault tolerant access to geographically dispersed files.
• Configure and implement VPN technologies between sites or users. Using both hardware and application solutions.
• Develop scripts for deployment, logons, notifications, replication, gathering data, encryption and administrative tasks.
• Design proactive monitoring systems for network utilization and server functions using open source applications.
• Overhaul backup methods and provided storage plan solutions for databases, mail, data and hardware.
• Implement and configure Citrix systems for application sharing and Sharepoint for content collaboration.
• Oversee production and development demo environments along with providing builds and tier-3 support.

Systems Administrator

Confidential - Hawthorne, NY

Responsibilities:

• Responsible for the Continuity of IT Operations, Data Center Infrastructure, Core Systems and User Support.
• Supported ERP system consisting of SQL database and front-end system support, maintenance and troubleshooting.
• Management of messaging system including Exchange, BES, Security and Spam Filtering.
• Implemented Appriver spam filtering solution and configured Exchange, changed records and trained users.
• Implemented Blackberry Enterprise Server within a virtual environment. Troubleshoot Blackberry issues.
• Implemented SSL certificate for Exchange web access along with the implementation of RPC-HTTPS for Exchange.
• Implemented VOIP system and prepared network involving layer3 switches, VLAN DHCP, routing and training.
• Introduced Linux systems which host different web based and collaboration solutions within a VMware environment.
• Linux administration of new installations, domain integration, web based application and user management.
• Implemented and configured multiple firewalls including access rules, NAT, objects, ports and multiple WAN links.
• Migrated gateway to Lightpath fiber consisting of planning and implementing WAN address change.
• Implemented load balancing cluster technology for mission critical servers along with nic redundancy.

Systems Administrator

Confidential - Old Greenwich, CT

Responsibilities:

• Administered network infrastructure in a high availability Windows, Linux and Virtual environment.
• Supported gateway routers, firewalls, managed switches, network appliances and subnets for multiple collocations.
• Managed domain controllers, database, application, data, web, proxy, email, backup, blade, security and failover servers
• Supported data center and collocation production/development server environment with a variety of network appliances.
• Managed messaging systems involving Exchange, mailbox shadows, spam filters, Blackberry BES and archive system.
• Overhauled multi-terabyte storage strategy and optimized job processes. Implemented desktop imaging.
• Configured and built Linux servers involving samba, backups, permissions, cluster front-end and compute nodes.
• Configured/built SQL server, permissions, backups, installation and tools. Experienced with queries, tables and restores.
• Virtualized using VMware ESX, VM server and VDI for DR solution. Cloned, deployed and configured templates.
• Supported various trading applications and in house hedge fund applications along with financial data lines.

Network Administrator

Confidential - Pompano Beach, FL

Responsibilities:

• Administered company network infrastructure, technical business processes and supported users.
• Managed Active Directory domain involving users accounts, name resolution, dynamic/static leasing and redundancy.
• Managed ERP system involving system upgrades, user issues, vendor relations, database processes and recovery.
• Supported messaging system, Exchange, spam, mailboxes, public folders, calendars and distribution groups.
• Managed firewall access policies, NATs, and ports. Supported switch connectivity. Maintained network connectivity.

Network/Application Support

Confidential - West Palm Beach, FL

Responsibilities:

• Supported 4 locations, 30 servers and over 200 employees with excellent customer service.
• Administered data center of production servers, development servers, blade servers and secured LAN.
• Supported production and development environments for application and database servers.