DevSlash

Accomplished IT Professional with outstanding technical abilities, in Network/Systems Administration & Management, excellent technical support, interpersonal, and training skills, great ability to learn and excel, following the result of over 9 years experience in the IT profession. Result-oriented with solid work ethic.

TRAINING & CERTIFICATIONS
SCSA – Sun Certified System Administrator
LPIC – Linux Professional Institute Certification
JNCIA-SSL – Juniper Networks Certified Internet Associate
JNCIA-WX – Juniper Networks Certified Internet Associate
Introduction to WAN Acceleration Framework (IWX), Juniper Educational Services, MA
Implementing the DX Application Acceleration Platform, Juniper Educational Services, CA
Lotus Notes/Domino Systems Administration, CALC Canterbury, NJ

COMPUTER SKILLS

Web Servers: Apache 1.3.x/2.0.x, IIS 4.0/5.0, Zeus, Tomcat
Networking: LAN, WAN, IP, TCP, UDP, FTP, DNS, SMTP, POP3, IMAP, HTTP, HTTPS, LDAP, NIS, SSH, SAMBA, SNMP, NFS
Mail: - Sendmail, Postfix, Exim, Qmail, Cyrus, Courier, Pure Message, Sophos, Ironport, Proofpoint, PGP Universal, Amavis, ClamAV, Spamassassin, RBL Servers
Security: – NMAP, SNORT, NESSUS, TCPDUMP, SSH, SSL, ipchains, iptables, ipf, TCP Wrappers, Tripwire, John the Ripper, Elemental, Eiq, Ethereal, PKI
Databases: Oracle, MySQL
Operating Systems: DOS, FreeBSD, Linux (Redhat, Slackware, Debian, SuSe. etc.), Solaris, Windows 3.11/ 9x/NT/2000/XP, MacOSX
Other: CVS, Nagios, X Window System, Legato Networker, NRPE, Cacti, MRTG, RRD Tool, Kernel Tuning, Subversion, Kickstart, Software RAID, EMC, Netapp, Bash

PROFESSIONAL EXPERIENCE

Reliant Security — 2009 – Present
Senior Security Engineer
• Assisted various clients in passing both PCI and SOX audits by evaluating environments and making necessary system and network changes.
• Converted various servers including Active Directory and Microsoft SQL servers from physical to virtual on the VMware vSphere 4 platform.
• Made various changes to AIX and Linux systems to harden them to meet security requirements.
• Implemented patch management for Windows hosts using WSUS and Group Policy. Implemented Group Policy for both WSUS and to meet hardening standards.
• Create a web application firewall using Apache and ModSecurity.
• Implemented and maintained Splunk installations for various customers. Implemented ftimes for file integrity monitoring.

Qwikker — 2008
Senior Systems Administrator
• Designed and implemented Qwikker’s infrastructure to manage 20,000+ Mobile Content Servers in the field.
• Migrated away from a datacenter on the west coast to a datacenter in NYC.
• Implemented and managed Dell EqualLogic iSCSI for sharing data between Tomcat and Apache nodes as well as storing VMware servers.
• Collaborate with engineering and product teams on product changes and enhancements.
• Implemented and managed Citrix Netscaler and Juniper Firewalls.
• Redesigned Qwikker’s Linux based Mobile Content Servers to use Wi-Fi for distributing content as well as other updates
• Worked with Terracotta for clustering an in house Java application for managing content.
• Implemented VMware ESX to manage resources without increasing company footprint.
• Migrated physical machines to virtual machines in a VMware ESX server environment.
• Developed and instituted a Follow-the-Sun Support Model as the requirements for support increased the need for 24×7x365 monitoring and support was accomplished by leveraging the global team.
• Working technical experience with designing, building, installing, configuring and supporting  MySQL database servers with replication.
• Planned and implemented an eCommerce site for distributing Qwikker’s MCS online.

WebMD — 2007 – 2008
Systems Engineer
• Lead administrator for Medscape Mail service featuring over 30,000 doctors.
• Redesigned server implementation process for standardization utilizing Opsware.
• Compiled custom RPMs to maintain consistency across the platform.
• Implemented MySQL Cluster for uptime and reliability.
• Interfaced with other departments for troubleshooting and enhancing performance.
• Migrated users from a single server Sun Solaris Cyrus IMAP platform to a distributed RHEL platform for improved performance and disaster recovery.
• Improved performance by tweaking Cyrus IMAP and the local systems to improve application performance.
• Migrated MySQL data from MyISAM to NDB. Tuned tables for optimal storage and performance.
• Implemented security controls for outgoing mail to mitigate spammers.
• Worked with developers to locate and correct bugs and improve performance.
• Wrote scripts to automate daily tasks such as maintaining mailboxes, message searching across mailboxes, etc.

IGX Global — 2005 – 2007
Systems Security Engineer
• Lead administrator for igxglobal’s data centers, including web servers, mail servers, DNS servers, and other systems, including installation, upgrades, and change control requiring in depth understanding of the Linux operating system.
• Redesigned igxglobal’s web server infrastructure to include highly available server cluster, ensuring reliability and minimum downtime.
• Redesigned igxglobal’s monitoring infrastructure utilizing Nagios, allowing for increased system capacity and ease of administration.
• Designed / Architected a major upgrade of core server infrastructure from Redhat 7.3 to RHEL.
• Redesigned igxglobal’s server standardization, including improvements in disk partitioning and packaging, with full documentation for future compliance.
• Implemented a company intranet to keep employees informed of company happenings.
• Redesigned igxglobal’s usage reporting infrastructure, making use of open source technology to provide customers real time access to their SNMP information. Administration of igxglobal’s redundant DNS infrastructure, including the cleanup of DNS zones, repair of RBL errors, etc.
• Assumed professional services responsibilities related to the PGP, Proofpoint, and Juniper SSL-VPN offering.
• Administrator of igxglobal’s Secure Mail 2 offering, mitigating existing server raid problems, responding to customer change requests, ensuring the overall customer deliverable.
• Experience in deploying and managing Juniper Netscreen firewalls and Juniper SSL VPN.

Zingy, Inc. — 2005
Systems Administrator
• Played a major part in planning the move for the company from one location to another. Dealt with vendors to install security system, halon, etc.
• Upgraded and standardized internal systems for performance and security issues.
• Implemented a ticketing system for to streamline support issues. Implemented a new Nagios server for service monitoring.
• Responsible for monitoring and maintaining 200+ production servers including web, wap, email, api, etc.
• Migrated mail servers from Courier IMAP and qmail running on MacOSX to a Postfix and Cyrus IMAP running on Redhat Enterprise Linux. Implemented new features such as Spamassassin, ClamAV, Amavis-new, and other tweaks to reduce spam and viruses drastically.
• Streamlined buying process to lower costs and simplify management.
• Managed the network including Cisco Catalyst. Managed network servers such as DHCP, DNS, Apache, Mysql, etc.

Rockefeller University — 2004 – 2005
Systems Administrator Consultant for CTI TEKSource
• Set up and configured IBM x345 servers with Redhat Enterprise Linux. Compiled custom kernels from Redhat back ported source to improve performance and security.
• Configured IBM ServeRAID using RAID 1 and 5. Configured Dell/EMC SAN, Sun StorEdge, and such using RAID 10.
• Planned an implementation of clustering for MySQL to provide better performance and high availability.
• Installed and configured servers for file sharing using Samba and NFS. Installed Tomcat for apache integration to run java web applications.
• Provisioned RHEL AS servers for Oracle RAC installation.
• Installed and configured QLogic fibre channel cards. Used Cyclades serial terminal servers.

Pegasus Web Technologies — 2003 – 2004
Unix/Linux Administrator
• Responsible for maintaining upgrades for security and performance issues.
• Upgraded Solaris infrastructure to Solaris 9.
• Setup, configured, and maintained web servers.
• Responsible for various internet services, including HTTP, SMTP, IMAP, DNS, and mySQL servers.
• Responsible for projects to upgrade various antiquated systems to bring them up to current security and functionality standards.
• Recompiled Linux kernels 2.2.x, 2.4.x, and 2.6.x for performance, security, etc.
• Setup and configured Redhat, CentOS, Debian, Solaris and FreeBSD servers with various web technologies for clients.
• Responsible for designing a UML (User-mode linux) solution for a VPS product as well as to provide a low cost testing server.
• Implemented backup servers to backup infrastructure of 1,000+ servers.

Refco — 2001 – 2003
Consultant for Forstar Ltd.
• Responsible for monitoring network and server stability to optimize efficiency and accuracy of operations.
• Implemented and performed mission critical EOD procedures. Utilized Spectrum Application Extender, Exceed, KEA.
• Created various scripts using the Bourne and Korn shell on Solaris systems to simplify and automate administrative tasks.
• Maintained Windows NT/2000 Solaris 7 and 8 servers. Performed routine checks on routers, switches, backup systems, etc.
• Performed troubleshooting and resolution of network and server issues.
• Installation and configuration of OpenSSH, Apache, Sendmail, and other technologies on the Solaris platform. Performed patch and package administration.
• Provided administration and configuration of DNS servers.

Live Products/E-Sim — 2000 – 2001
Systems Administrator
• Designed and implemented technical – hardware, software, and network infrastructure.
• Initiated implementation of innovative technologies and services. Developed project plans.
• Developed and implemented company Intranet. Utilized Redhat Linux, Apache, PHP, and mySQL.
• Facilitated migration of Domino Server from California to New York City Office.
• Managed and administered Domino Server for entire USA. Supported Lotus Notes.
• Responsible for implementation of Windows NT/2000 and Redhat Linux Servers for centralized data, DHCP, print sharing, FTP, Apache.
• Oversaw server issues such as reviewing logs, reviewing errors, performing upgrades, and maintaining performance. Maintained company network infrastructure.
• Performed relationship management with hardware software, and network vendors. Developed web based asset tracking system using PHP and mySQL.
• Implemented a backup solution for company
• Interfaced with clients. Provided telephonic support to users throughout USA and Israel.

ADDITIONAL COMPANIES

MCI                                            2003
Keyspan                                     2001
Malcolm Pirnie                           2000
Ogden Energy Group                  2000
PriceWaterhouse Coopers          1999-2000
Beth Israel Hospital                   1999
Instantlink Internet Access       1996-1998