Zimbra Administration Freelancers

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Last updated: October 1, 2015
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Deibys Paredes

Deibys Paredes

Linux Systema Administrator


I am a professional organized, efficient, dependable, who has worked in several IT fields for over 10 years. With experience as a Linux System Administrator, Linux Network Administrator, migrations planning and many other functions. I can bring value to your business and help solve issues. I have strong knowledge in Web server (Apache, Lighttpd, Nginx, PHP, Perl, Python..), Monitoring (Cacti, Nagios, Zabbix), Mail server (Sendmail, Qmail, Postfix, Zimbra...), DNS (Bind, Power DNS...), Firewall, Network, Database (MySQL, noSQL: couchbase...), load balancing (HaProxy, LVS..), Virtualization (VMware vSphere, XEN, Proxmox, Citrix...). However, my knowledge is not limited in these areas.

$17.00 /hr
0 hours

Manish S.

Subject Matter Expert in Microsoft Technology (Implementation Expert)

India - Portfolio: 1

Technically sophisticated & result driven professional with ITIL 2011, MCSA, RHCE & CCNA with nearly 6 years of experience in Networking and System Administration/ Support. Along with qualifications in M. Sc in Computer Science Technology & Post Graduate Diploma in Computer Application.  Insightful experience in implementation, operations and support functions of mission- critical business solutions using IT as a tool.  Well developed skills in providing technical solutions based on various Operating Systems, Applications Concepts & Servers, cutting across a broad range of Networking/System Technologies.  Demonstrated strengths in maintaining the entire IT Infrastructure at client site covering all issues related to SW/HW & Networking. Exposure to administration across multiple locations.  Competent in planning, implementation, configuration and maintenance including troubleshooting. Recognized as an important resource in a team.  Acknowledged performer with high analytical, interpersonal skills and problem solving skills. Excellent communication skills, enriched with logical reasoning.  An effective communicator with strong team management, leadership, analytical and coordination abilities Systematic and organized with quick adaptability to changing trends and processes. Proficient in English & Hindi. System/Networking Projects o Leading the team of technical professionals during the development stages. o Managing IP allocation and ensuring minimal downtime of machines. o Installing and configuring the hardware/ software/ mail servers, ensuring optimal performance. Technical Support/ Troubleshooting o Conducting periodic reviews with the customer and analyzing calls and their trends to take proactive measures to reduce knowledge-based calls. o Suggesting improvements in the operations and processes to make the system foolproof. Technical Skill Set Operating Systems: o 06 years Windows Servers (2008, 2003,2000) o 05 years Linux (SuSE, Redhat, Centos, Debian, Ubuntu) o 04 years MacOS X (Desktop) o 02 Years Fortigate Product Support i.e. 60C, 80C, 200D Microsoft Network o Knowledge of Implementation of AD, Domain Controller, MS Exchange Server, MOSS. o Implementation and performance tuning of Windows 2003 Server environment for client’s operations. o ADS like “creating child domain, OU’s, replication, creating and maintaining user accounts”. o Managed systems configuration and maintenance, problem troubleshooting, system and program security. o Managed Applications and program management, planning and directing upgrades, and testing operations to ensure optimum system functionality. System/Networking: o Complete understanding of TCP/IP, UDP, ICMP. o Network troubleshooting, LAN IP Accounting & Various Server configurations o Physical network maintenance and upgrades & Basic switch and router maintenance o FortiGate Firewall working Experience, i.e. 60C, 80C, 200D. o DHCP , SNMP , Load Balancing , MRTG, IPTraf, TCPDUMP etc. Security: o Advanced knowledge of Linux security o Secure internet services, with squid Proxy and Iptables firewall. o Security Policy Designing, Implementation o Firewalls (Iptables, Netgear, IP Filter, Fortinet) o LAN/WAN security, Network/Host Security Auditing, Vulnerability Scanning (Nessus). Software: o Apache HTTP/HTTPS servers (versions 1.3.x/2.0). o DNS (BIND 4/8/9) POP, IMAP, IMAPS. o Mail Services (Postfix, QMail, Zimbra, Postfix, MS Exchange 2007&2010) o Antivirus Packages (Symantec Endpoint Protection, Trend Micro PC-cillin ) o X Window System (configuring servers, desktops, application servers, XDM) o Packages & Tools (SCSM 2012, MIIS, MOSS, Sugar CRM, Vtiger CRM, JIRA, Joomla) Database Administration: o MySQL, MSSql (Installation, Configuration, Backup schedule, ) Programming/Scripting: o Intermediate level, mostly systems automation and maintenance tasks. o Batch & Shell scripting. Hardware: o Met with Vendors to provide new technology (Software, Hardware, Tools, and Device) to enhance the Windows network architecture o All forms of x86 hardware (from laptops to quad Xeon CPU servers) o Cisco routers/switches/terminal servers o Lots of co-location facility experience, large server installations, racking, power management, etc

$8.89 /hr
0 hours

Thang K.

Thang K.

System Administrator & Security Researcher

Vietnam - Tests: 8

Have over 8 years in IT/Security fields with deeply experience. I use Linux/MacOS all the time and doing server stuffs such as server configuring, system optimizing, service integrating as well as troubleshooting. My core knowledge is about networking and security. I also understand web development/programming on LAMP platform, and making some automated-tools as needed.

$22.22 /hr
330 hours

Tushar C.

Tushar C. Agency Contractor

Linux Admin| Zimbra| Postfix| ODoo| VSTO| Mobile Apps|Javascript

India - Tests: 2 - Portfolio: 7

I am developer/administrator believing in Open source technologies and providing cutting-edge solutions easing the professional and social life designing need specific solutions. Expertise : Administration, Consultation and Customization of Zimbra and OpenERP/Odoo as private Cloud based solution. Email Migration from various other mail solutions to Zimbra: Office 365 to Zimbra Exchange to Zimbra Dovecot Postfix to Zimbra Squirrelmail to zimbra Gmail to Zimbra Yahoo to Zimbra Building an automation script for migration. Android and iOS Mobile application Development. Technology Stack Java, C#, PHP, Python, Javascript, HTML/CSS, MySql, Objective C, Shell Script Android, iOS

Associated with: SilentInfotech

90% Job Success
$30.00 /hr
238 hours

Sajjan Bhattarai

Sajjan Bhattarai

System Administrator

Nepal - Tests: 9 - Portfolio: 2

I've been in IT industry since last two years. I've solid understanding and experience of system/network administration, IT Security and software development/engineering. My major skill sets include Linux administration (CentOS 6/7), Virtualization (Vmware & XenServer), Storage, Networking (Cisco & Juniper), and Scripting (Bash & Python). Beside these, I'm also very good in web application development (PHP, Javascript, CSS, HTML, jquery). I'm a graduate in Computer Networking and IT Security from London Metropolitan University. Along with my technical skills, I've excellent command of English language and communication skills.

$10.00 /hr
0 hours

Vijay Kumar N

Vijay Kumar N Agency Contractor

AWS Cloud & System Admin

India - Tests: 3 - Portfolio: 14

Having 2+ yrs of experience work on installation, configuration, monitoring of cloud based Infrastructure for various enterprise products and systems. Below is the quick summary of my career: ============================== Having good knowledge in Hadoop, NOSQL, AWS Having good experience and knowledge on LDAP and Identity Management Installation Experience in Automation ,Monitoring and Infrastructure management Good knowledge on Public and Private Cloud Exposure of SAAS,PAAS and IAAS Good knowledge on Application servers and web servers Well Experienced in email services and installation Having Experience in Middleware Technologies Good Experience in different OS installations Having knowledge on Ruby on rails Having good experience in installation of CMS and DMS Well experienced in installation of Version Control tools Having experience in installing Webmin, Puppet Technical Skills =========== Virtualization: ESXi, VCenter, Xencenter, Xenserver. PAAS Infrastructure : openshift Bigdata: Hadoop, Pig,Hive, DBMongo Cloud and Virtualization: Amazon,Ec2,VPC,Load Balancing, Private Cloud: Openstack,Cloudstack Public Cloud: Openshift,Stratos,Heroku,Engine-Yard,Startos FTP: NAS, Samba,Confluence,Jira,Juju. Integration : WSO2 ESB and Apache Camel Email service : atmail,zimbra Middleware: Jbpm (JPDL and BPEL),wso2 process server), RabbitMQ, JCA, SCA Application : Web services (WS-*), SOAP,wso2 application server CMS & DMS : Joomla,Drupal,Magento,Wordpress,Alfresco Web & Portal : Liferay Version control and continuous integration: Jenkins,SVN,Maven Identity and Security mgmt : WSO2 ,SSO, openLdap,fortress, openIDM,wso2 identity server Application Server: Jboss,Wso2 Monitoring: Nagios,cpanel,Plesk Load Balancing: Mod_jk,Apache Tomcat,Nginx Project & Project Management Experience: =============================== Bizruntime IT Services Pvt Ltd: Internally projects with WEH and GCS Infotech Pvt Ltd. WEH: Software Engineer Work on LDAP and Identity Management Work on Amazon, EC2,VPC,Load Balancing,Route53. LDAP Synchronization with Liferay Worked on AWS instances. Worked on SSH-keygen Worked on Cloning the instance from one region to another region. GCS Infotech Pvt Ltd: Software Engineer Worked on Load balancer using Mod_jk,Apache tomcat,Nginx Worked on email services like atmail,zimbra Worked on mysql clustering,postgres Installation of Puppet and Webmine Worked on RabbitMQ Server BizRuntime IT Services Pvt Ltd: Software Engineer Work on Cloudera Installation Installation of Different OS Worked on Version Controllers Worked on SSH-keygen Working on Private Cloud Like..Openstack,Cloudstack, Virtualization of servers Worked on local installation of atmail and Zimbra configured email services. Working on Monitoring tools Like..Cpanel,Nagios,Plesk Worked on OSB for Virtualization purpose Working on Oracle Fusion Middleware Like..SOA using JDeveloper

Associated with: HRO IT Services Pvt Ltd, Bizruntime IT Sevices Pvt Ltd

100% Job Success
$22.22 /hr
1,622 hours

Herbert Seman

Herbert Seman

IT Ops/Linux System Administrator


- 10 years solid system administration experience in a multi-national companies. - 4 years of being an IT consultant for small and medium companies that requiring IT systems and infrastructure solutions. - 12 years hands-on experience in linux systems including CentOS, Ubuntu, Redhat Note: I'm new to this Odesk so I'll set my hourly rate to minimum for now to get some clients.

$20.00 /hr
7 hours

Kapil Malik

Kapil Malik Agency Contractor

AWS / cPanel / Linux / MySql / Zimbra / Puppet / Scripting / SugarCRM

India - Tests: 5

Senior AWS / Linux / Zimbra / Puppet / SugarCRM expert Hosting Experience with Rackspace, AWS, OVH AWS specializataion in EC2, Route53, S3, AMI, SNS, SQS and AutoScaling Virtualization exposure in AWS, VMWare Storage skills in EMC, Dell Compellent, Synology CRM expertise in SugarCRM and SuiteCRM Databases expert in MySQL and RDS Scripting / programming skills in Puppet Administration / Shell Scripting / sed / awk

Associated with: DreamPower

82% Job Success
$16.67 /hr
169 hours