Hire the Best Zimbra Administration Specialists

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Zohaib S.

Hyderabad City, Pakistan

$10/hr
4.2
59 jobs

Since 2011, I’ve carved out a niche as a dedicated IT professional with a passion for both Linux and Windows systems. I specialize in creating resilient IT infrastructures and am committed to leveraging my dynamic expertise to solve complex technology problems. Key Strengths: Ubuntu, Debian, Centos, AlmaLinux. Redhat Nextcloud Email Server Zimbra Matrix Synapse Chat Server VPS Hosting Webhosting Apache, Nginx Gitlab Gerrit Rsyslog Server Collabora Nextcloud Office Signaling Server HPB Nextcloud Jitsi Meet Wordpress & Laravel Deployment Phpmyadmin SMTP Server Postfix OpenVPN Community Edition SSO OpenLDAP Taiga Project Management Tool Deployment Cronjobs Guacamole RustDesk Nagios Core PHP multiversion NGINX and Apache Reverse Proxy Rocketchat Tomcat Digital Ocean Linode VPS Hosting Linux Complex Troubleshootings Webmin Virtualmin DNS SPF, DMARC, DKIM, MX Records Google Workspace And Goddy Domains Integration WHM Cpanel Plesk Wordpress Deployment / Migration Google Workspace & Email Deliverability

  • Zimbra Administration
  • System Administration
  • GitLab
  • Web Server
  • Linux
  • DigitalOcean
  • Ubuntu
  • Debian
  • OpenVPN
  • NGINX
  • Apache Administration
  • Apache HTTP Server
  • Linux System Administration
  • Server Administration
  • DNS
  • Email Deliverability
  • Google Workspace
Nadlir N.

Magelang, Indonesia

$30/hr
5.0
8 jobs

Experienced System Administrator and DevOps with specialists in Ubuntu/Debian, cPanel/WHM, Docker, Ansible, AWS, and Kubernetes. Fully bilingual (English, Indonesian, Arabic*) I'm dedicated to providing reliable solutions for server management, application deployment, and server/app troubleshooting. I deliver exceptional results and am always on time for meetings. 🔥 Core expertise: 🔹 Ubuntu/Debian/RHEL-based 🔹 cPanel and WHM 🔹 WordPress 🔹 Docker 🔹 Ansible 🔹 AWS 🔹 Kubernetes 🔹 Proxmox 🔹 pfSense 🔹 Zimbra 🔥 Hosting and Cloud expertise: 🔹 DigitalOcean 🔹 Vultr 🔹 Hetzner 🔹 OVH 🔹 Contabo 🔹 Namecheap 🔹 Siteground 🔹 InmotionHosting 🔥 Other technologies: 💻 JavaScript, Python, Bash, Git, Markdown, Grafana, Prometheus, Zabbix, Jenkins. 🔥 Key points: 🔹 Proficient at troubleshooting and documentation. 🔹 Proficient at application deployment. 🔹 Experienced in server management. 🔹 Believer in open and transparent communication throughout the project. 🔹 Available for regular updates, feedback, and addressing any questions and concerns. 🔹 Client satisfaction is my top priority. 🔹 Experienced in supporting individuals and organizations.

  • Zimbra Administration
  • System Administration
  • DevOps
  • Linux
  • Ubuntu
  • Amazon EC2
  • Proxmox VE
  • Technical Writing
  • Technical Documentation
  • cPanel
  • NGINX
  • Apache Administration
Karthik R.

Chennai, India

$15/hr
4.7
87 jobs

✅ ABOUT ME: I am a Professional Full Time Freelancer. I have 9+ years of experience working on Windows/Linux server administration, CICD Devops ,AWS, Azure, windows/Linux troubleshooting, HyperV, proxmox servers, DNS records mapping, IIS, Domains and DNS records management, active directory, web server, webhosting, databases administrations and Mail server implementations, administrations for the mail services MS Office365, Gsuite, Zimbara and postfix . ✅ WHY ME? • Full-time Professional – I work on Upwork as a full-time freelancer. I take every project seriously and I am highly professional. • Highly responsive – I’ll always get back to you in less than 02 hours. • 100% Client satisfaction – I provide revisions and modifications even after our contract ends. • I provide accurate solutions and just as important, I can guide you to future prospects and put your project on the right track. • Good communication skills – You will find me very friendly to talk to. ========================================= #Windows Servers - clients #Linux Server - clients #Web servers - IIS, Apache, XAMPP, Nginx and Tomcat #Database Servers - MSSQL, ORACLE, MYSQL, MongoDB #Webhosting tools- Plesk, cPanel and CWP #Cloud services providers - AWS, Azure, GCP, Digital Ocean, World stream, OVH Cloud, Hetzner and Hosting raja #Hosting providers - Hostinger, Bluehost, Namecheap, Godaddy, Bigrock and Hostgator #Active Directory - setup, users creation, Centralized Management, policy creation and enhanced Security #Troubleshooting - L1, L2 Tools used ============== Github, SVN IIS,Apache,Tomcat,Nginx , Apache Kafka and Wordpress SSH, RDP, VNC, Anydesk, Splashtop and screen connect Mobaxterm,Toad,SSMS and Workbench Plesk,WHM,Cpanel Active Directory, IAM Servicenow, Redmine, Microsoft Teams and Slack Previous Clients Feedback: 1- "Karthik was an exceptional Upworker to deal with. He was responsive, communicative, knowledgeable and proactive at solving my urgent technical issue (my businesses website was down for an unknown reason) and I wouldn't hesitate to recommend him to anyone else seeking an excellent technical support specialist. Thank you Karthik!" 2- "Karthik went above and beyond to progress with a very difficult issue in a very short period of time. He is kind, hard-working, and knowledgeable." 3- "I recently had the pleasure of working with "Karthik Raja" on installing PMB Software project, and I must say it was an outstanding experience from start to finish. I highly recommend "Karthik Raja" to anyone seeking top-notch freelancing services." 4- "he provides ideas to solve our problems he is a best gem have ever met. He focused only in customer satisfaction. no negative reviews." So why wait? Just invite me to your job on Upwork so we can discuss how to make your project a success. Let’s work together and get it done!! Thanks, Karthik

  • Microsoft IIS
  • Microsoft Windows
  • System Administration
  • TortoiseSVN
  • Database Management
Nika B.

Tbilisi, Georgia

$25/hr
5.0
1 jobs

I design, troubleshoot, and automate network and infrastructure environments — from mixed-vendor enterprise networks to mail server delivery issues. Currently managing a multi-site production network across MikroTik, Aruba AOS-CX, and HPE Comware, tied together with WireGuard EoIP tunnels and a Prometheus/Grafana monitoring stack I built from scratch. Areas I help with: Network Design & Troubleshooting — robust topologies, complex routing/switching fixes across mixed-vendor environments Observability & Telemetry — custom dashboards so you can see what's happening on your network in real time Network Automation — Python scripts for metrics, repetitive tasks, and dynamic config pushes Virtualization & Deployments — virtualized network appliances, servers, automated imaging workflows Security & Packet Analysis — deep traffic log and packet capture analysis Mail & DNS — SPF/DKIM/DMARC fixes, DNS record management, Linux mail server troubleshooting Stack: Cisco, Aruba AOS-CX (VSF), HPE Comware, MikroTik · Ubuntu Server, Arch Linux · Prometheus, Grafana, SNMP Exporter, Wireshark, Zeek, Zui, NetworkMiner · Python (SSH automation) · Proxmox VE, KVM, FOG Project

  • Computer Network
  • Network Engineering
  • Computing & Networking
  • DevOps
  • System Administration
  • Prometheus
  • Grafana
  • Linux
  • VMware Administration
  • Proxmox VE
  • VPN
  • SMTP
  • Virtualization
  • Network Architecture
  • DNS
  • Email Deliverability
Arbesa Q.

Tetovo, North Macedonia

$5/hr
5.0
35 jobs

I’m Arbesa a highly organized and dependable Finance, Accounting, Administrative & Project Coordinator with 5+ years of experience supporting entrepreneurs, executives, and growing businesses. I help organizations run smoothly by managing financial operations, accounting support, HR processes, and project coordination ensuring accuracy, compliance, and on-time execution. I’m known for my attention to detail, proactive communication, and ability to handle multiple priorities with confidence. Whether you need structured financial support, reliable administrative coordination, or HR assistance, I deliver consistent, high-quality work that helps your business stay organized and scalable. ⭐ Services I Offer 🔸 Finance & Accounting Support • Accounts payable & receivable • Invoice processing and payment tracking • Payroll coordination and expense management • Reconciliations and financial reporting support • Accurate data entry and record-keeping 🔸 Administrative & Executive Support • Calendar and inbox management • Meeting scheduling, reporting, and documentation • Vendor and supplier coordination • Confidential executive and team support 🔸 Project Coordination & Operations • Task tracking, timelines, and progress reporting • Budget tracking and cost monitoring • Procurement support and purchase order tracking • Process improvement and workflow organization 🔸 HR Support • Recruitment coordination and candidate screening • Employee onboarding & offboarding • HR documentation and personnel file management • Timesheets, attendance, and leave tracking 🛠 Tools & Systems QuickBooks | Microsoft Excel | Google Sheets | Zoho (People, CRM, Projects) | Microsoft Office | Google Workspace | Slack | Zoom | Dropbox ✅ Why Clients Choose Me ✔️ 5+ years of cross-functional experience ✔️ Strong accuracy, compliance, and confidentiality ✔️ Reliable communication and fast turnaround ✔️ Proactive problem-solver and self-starter ✔️ Ideal for long-term and ongoing support

  • Administrate
  • Data Entry
  • Payroll Accounting
  • Payment Processing
  • Invoicing
  • Finance & Accounting
  • Accounts Payable
  • Accounts Receivable
  • Payroll Reconciliation
  • Financial Report
  • Invoice
  • Transaction Data Entry
  • Administrative Support
  • Datalab Pantheon
  • Microsoft Excel
Kelly N.

Bekasi, Indonesia

$5/hr
5.0
4 jobs

Hi! I’m Kelly, a Virtual Assistant and Administrative Support professional with experience in bookkeeping, invoicing, accounts receivable, payroll support, data entry, and business operations support. I help businesses stay organized, maintain accurate records, and manage day-to-day administrative tasks efficiently. I have experience supporting companies in healthcare, restaurant, and HVAC industries, where I handled invoice management, payment tracking, bookkeeping support, scheduling, operational coordination, and customer communication. My portfolio includes administrative systems, reporting management, QuickBooks invoicing, and operational workflow coordination. Here’s how I can support your business: • Virtual Assistance • QuickBooks Bookkeeping Support • Invoice Processing & Payment Tracking • Accounts Receivable Support • Data Entry & Spreadsheet Management • Calendar & Email Management • Payroll Assistance • Financial & Operational Reporting • Customer Communication • Administrative Support Tools & Platforms: • QuickBooks • Google Workspace • Microsoft Excel • Google Sheets • Microsoft Office • Canva • WATI • Terra • Revel POS Some achievements from my experience: • Processed 150+ financial transactions daily • Improved invoice billing efficiency by 50% • Supported 100% payout accuracy in insurance billing documentation projects • Managed operational reporting and payment tracking systems I am detail-oriented, organized, reliable, and committed to delivering accurate work on time. Let’s work together to support your business operations efficiently.

  • Microsoft Office
  • Management Skills
  • Indonesian to English Translation
  • English to Indonesian Translation
  • Microsoft Excel
  • Virtual Assistance
  • Bookkeeping
  • QuickBooks Online
  • Administrative Support
  • Account Reconciliation
  • Invoicing
  • Data Entry
  • Calendar Management
  • Email Management
  • Customer Support
  • Payroll Reconciliation
  • Google Workspace Administration
  • Financial Reporting
  • Document Management System
  • Email Communication

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Don't just take our word for it

What does a Zimbra Administration specialist do?

A Zimbra Administration specialist configures, operates, and maintains the server components that power Zimbra Collaboration environments. This role focuses on account provisioning, directory integration, and system configuration through both graphical interfaces and command-line tools. The specialist ensures mail and collaboration services function correctly by managing authentication sources and user data.

  • Configure external authentication sources such as LDAP or Active Directory to verify user identities. Set connection parameters, binding settings, and security options within the Zimbra admin settings to establish secure communication with directory servers. Validate that Zimbra services correctly query and use the configured directory data for login and address lookups.
  • Provision and manage Zimbra users, accounts, and domains using the Admin UI and CLI tools like zmprov. Execute bulk provisioning tasks by preparing input files for command-line batch operations to create or update many accounts at once. Modify domain attributes and administrative console settings through direct CLI commands to keep configuration objects current and accurate.
  • Deploy and enable admin extensions through the Admin UI workflow to add required functionality to the management interface. Install necessary extension packages and verify their operation within the Admin Console. Support delegated administration by granting specific access rights to other administrators, allowing them to manage subsets of users or domains without full system privileges.

How to hire a Zimbra Administration specialist on Upwork

Step 1: Post a job

Define your server environment and authentication needs clearly to attract qualified candidates. Use the Job Post Generator powered by Uma™, Upwork's Mindful AI to draft a precise description in seconds. Describe your requirements for LDAP integration or user provisioning, and Uma creates a tailored post. You can write a new post, update a saved draft, or reuse an existing post.

  • Specify whether you need bulk account provisioning via CLI tools like zmprov or configuration changes through the Admin UI.
  • List required experience with external authentication sources, such as Active Directory or standard LDAP directories.
  • Clarify if the role involves deploying admin extensions or managing delegated administration access for your team.

Step 2: Evaluate candidates

Look for proof of hands-on server management and directory service integration in candidate profiles. Uma runs instant video interviews and builds shortlists with side-by-side comparisons to help you assess technical fit quickly.

  • Check for documented examples of configuring Zimbra Collaboration Suite domains and validating directory attributes.
  • Verify experience with command-line batch operations for creating or modifying large sets of user accounts.
  • Review past work showing successful binding of Zimbra services to external identity providers without service interruption.

Step 3: Interview your top choices

Discuss specific troubleshooting scenarios and configuration workflows to gauge practical knowledge. Schedule and conduct interviews within Upwork Messages, which generates an immediate transcript and summary after each session.

  • Ask how they handle port security and connection settings when integrating new LDAP authentication sources.
  • Request examples of using zmprov commands to update domain attributes or resolve provisioning errors.
  • Discuss their process for documenting administrative changes to ensure future maintainability of your server.

Step 4: Agree on scope and begin work

Set clear milestones for authentication setup, user migration, or extension deployment before starting. Use Upwork Messages and the contract workroom for communication and project management, plus identity verification, payment protection, hourly tracking, and project funds for security.

  • Define deliverables such as a fully tested LDAP integration or a verified list of provisioned user accounts.
  • Establish a timeline for deploying admin extensions and validating their function within the Admin Console.
  • Agree on documentation standards for all configuration changes made to Zimbra directory and service settings.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a Zimbra Administration specialist cost?

$500-$1,500 per project is a typical range for focused Zimbra Administration specialist work. Final pricing depends on scope, technical complexity, required integrations, source-material quality, revision needs, and the freelancer's experience level.

User provisioning

$500-$1,200/project

Entry-level to mid-level
  • Provisioned user accounts via CLI or Admin UI
  • Configured domain attributes and settings
  • Verified account access and directory sync

LDAP integration

$1,200-$2,500/project

Mid-level
  • Connected Zimbra to LDAP or Active Directory
  • Configured secure binding and port settings
  • Validated directory data flow to mail services

Admin extension deployment

$2,500-$4,500/project

Mid-level to senior-level
  • Deployed admin extensions via Admin UI
  • Applied extension-specific server settings
  • Enabled delegated admin access for users

Server configuration

$4,500-$7,000/project

Senior-level
  • Modified global and domain attributes with zmprov
  • Adjusted local configuration for performance
  • Documented all administrative configuration changes

Full environment setup

$7,000-$12,000/project

Expert-level
  • Installed and configured core Zimbra components
  • Integrated external authentication and directory services
  • Submitted operational docs and delegated access keys

Frequently asked questions

Is hiring a Zimbra Administration specialist worth it?

For most businesses, yes: hiring a Zimbra Administration specialist is worthwhile. These experts configure LDAP or Active Directory authentication to secure user access and provision accounts in bulk using CLI tools. This focused support keeps your mail and collaboration services running without requiring your internal IT team to master Zimbra-specific commands.

How do I evaluate Zimbra Administration specialist candidates?

Look for candidates who describe specific experience with Zimbra CLI tools like zmprov for batch user provisioning and LDAP integration. A strong candidate will explain how they configured binding settings for Active Directory or deployed admin extensions through the Admin UI to meet your security requirements.

What tasks does a Zimbra Administration specialist handle?

A Zimbra Administration specialist provisions users and domains, configures external authentication sources like LDAP, and manages directory settings. They also deploy admin extensions and update server configuration objects to maintain system stability.

Can a Zimbra Administration specialist manage delegated admin access?

Yes, these specialists configure and grant delegated admin access within the Admin Console. This workflow allows you to assign specific administrative privileges to other team members while maintaining central control over core server settings.