System Administration is a skilled job that requires expertise and reliability. A System Administrator takes care of the operations, maintenance and enforcement of a computer/information systems network, server and applications for clients. Improving performance, security and stability of the system are integral parts of their job. They also have to handle software upgrades or the installation of new hardware, and will provide guidance, technical support, and training to users.

For most organizations, be it large companies or small businesses, System Administration is absolutely essential in keeping their day-to-day operations running smoothly. This is because they need someone with the technical expertise to manage, maintain and keep their computer networks functioning properly.

Here’s some projects that our expert System Administrator made real:

  • Network setup
  • Security configuration & monitoring
  • Vulnerability & security audit
  • Server installation & maintenance
  • Troubleshooting & error rectification
  • Software upgrade & installation
  • Database backup & restoration
  • Performance optimization

In today’s digitally driven world, it is no surprise why System Administrators are in such demand. They are a reliable resource for organizations who want professionals who can handle operations both smoothly and efficiently. Companies now have no choice but to set aside a budget for hiring System Administrators – even if it means going digital and finding one on Freelancer.com.

At Freelancer.com, we understand how important it is for you to have qualified professionals working on your projects. We also understand that you may not always have the capacity or budget to hire one full time – this is why you should consider looking intoFreelancer.com where you can find quality System Administrators with different levels of experience in your area at an affordable price. Whether its a short term or long term project, our System Administrators will be up for the task anytime!

Now that you know how important it is to have an expert System Administrator working on your business’s IT systems, we invite you to post your own project on Freelancer.com and hire an experienced professional today!

Dari 155,162 ulasan, klien menilai System Administrators kami 4.9 dari 5 bintang.
Rekrut System Administrators

System Administration is a skilled job that requires expertise and reliability. A System Administrator takes care of the operations, maintenance and enforcement of a computer/information systems network, server and applications for clients. Improving performance, security and stability of the system are integral parts of their job. They also have to handle software upgrades or the installation of new hardware, and will provide guidance, technical support, and training to users.

For most organizations, be it large companies or small businesses, System Administration is absolutely essential in keeping their day-to-day operations running smoothly. This is because they need someone with the technical expertise to manage, maintain and keep their computer networks functioning properly.

Here’s some projects that our expert System Administrator made real:

  • Network setup
  • Security configuration & monitoring
  • Vulnerability & security audit
  • Server installation & maintenance
  • Troubleshooting & error rectification
  • Software upgrade & installation
  • Database backup & restoration
  • Performance optimization

In today’s digitally driven world, it is no surprise why System Administrators are in such demand. They are a reliable resource for organizations who want professionals who can handle operations both smoothly and efficiently. Companies now have no choice but to set aside a budget for hiring System Administrators – even if it means going digital and finding one on Freelancer.com.

At Freelancer.com, we understand how important it is for you to have qualified professionals working on your projects. We also understand that you may not always have the capacity or budget to hire one full time – this is why you should consider looking intoFreelancer.com where you can find quality System Administrators with different levels of experience in your area at an affordable price. Whether its a short term or long term project, our System Administrators will be up for the task anytime!

Now that you know how important it is to have an expert System Administrator working on your business’s IT systems, we invite you to post your own project on Freelancer.com and hire an experienced professional today!

Dari 155,162 ulasan, klien menilai System Administrators kami 4.9 dari 5 bintang.
Rekrut System Administrators

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    22 pekerjaan ditemukan
    AlmaLinux 8 SolusVM Slave Setup
    6 Hari left
    Terverifikasi

    Prepare OVH Server with AlmaLinux 8 so it can be added as a solusVM slave. Everything is already ready. The solusVM master is ready and already has a slave ready in another infra. We want an additional solusVM slave installed. Your task is to check the slave settings and setup the bridge and get it ready to add. Please don't bid and re-bid or ask too many questions - the project is clear. Full root credentials will be sent to you. This is a $10/$30 task.

    $55 Average bid
    $55 Rata-rata
    5 penawaran

    AWS Account Strategy & Setup Create multiple AWS accounts (recommended for security and operational isolation) — one per environment if possible (e.g., dev, staging, prod). Properly set up networking in the new account(s): VPCs, subnets, security groups, VPNs (or Direct Connect if needed) — this is a priority improvement requested previously. Infrastructure Provisioning Rules All infrastructure (servers/EC2, S3 buckets, RDS databases, etc.) must be created using existing CDK stacks — no manual creation allowed. Deploy and adapt CDK stacks to the new account(s)/environment(s) as needed. Domain & DNS Migration (Critical – Involves Downtime) Delegate DNS by updating nameserver (NS) records at the registrar to point to the new AWS Route 53 Hosted Zone(s) in th...

    $329 Average bid
    $329 Rata-rata
    67 penawaran

    I need a reliable end-to-end VPN tunnel that lets me reach my home network safely whenever I’m on the road. The plan is straightforward: host a VPN server at my house and have a small travel router automatically connect to it, so every desktop, laptop, or phone I plug into that router behaves as though it’s on my local LAN. My devices • Desktops / laptops and mobile phones • Operating systems in play: Windows, macOS, and Android Primary goal Secure remote access to my home network so all my internet traffic has my home IP address. Additionally, access to smart-home gear without exposing anything publicly. What I need from you 1. Recommend and configure the best protocol for this use case (WireGuard or OpenVPN are fine if they suit the gear). 2. Set up t...

    $143 Average bid
    $143 Rata-rata
    33 penawaran

    My team manages a mid-sized data center that runs almost entirely on Cisco switches, routers, and firewalls. I need an experienced network engineer to jump in on a contract basis and keep everything running smoothly. Day-to-day work revolves around classic routing & switching tasks—think VLAN design, trunking, OSPF and basic BGP tuning, plus the inevitable “why can’t that server talk to that subnet?” moments. The core stack is Cisco IOS/IOS-XE with a mix of Catalyst and ISR hardware. Because this installation underpins production workloads, fast-paced troubleshooting is as important as clean architecture. You should be fully at home with TCP/IP and the OSI model, comfortable tracing packets through multiple hops, and ready to document changes clearly for hand...

    $36 / hr Average bid
    $36 / hr Rata-rata
    14 penawaran

    I am moving away from hostgator hosting to create an email server at home. Hostgator will still host the domains and DNS will be handled by cloudflare (free account) Existing email will be copied so no email messages will be transfered Mailcow instance will be installed on a locally hosted machine (debian 14 server) and this is a dedicated machine. What I need assist me to handle end-to-end: • Deploy and harden Mailcow (Docker-compose stack) on my home server, enabling HTTPS, DKIM and SPF. • Update and verify all DNS records (MX, SPF, DKIM, DMARC) so deliverability is rock-solid. - Experience with Mailcow and email server configurations. - Familiarity with DNS management and cloudflare services A solid track record of self hosting with Mailcow and DNS management is essen...

    $179 Average bid
    $179 Rata-rata
    42 penawaran

    I need a hands-on network engineer who can spend a single day at our client’s site completing a clean install and initial turn-up of the new infrastructure. Detailed network diagrams are already prepared, so you will be able to follow clear port-by-port instructions. Your primary focus will be racking, stacking, powering on, and patching all specified devices—namely the routers, switches, and wireless access points—exactly as shown in the diagrams. Once each unit is in place, please enable console access so our remote engineers can jump in for final configuration. During any gaps in the schedule, the client may ask for light break-fix help on user equipment such as desktops, laptops, or printers. Nothing complex here—just straightforward troubleshooting to keep th...

    $38 / hr Average bid
    $38 / hr Rata-rata
    9 penawaran
    Secure Windows Server Farm Management
    5 Hari left
    Terverifikasi

    My private server farm runs entirely on Windows Server 2019/2022 and I want a single, reliable point of contact to keep it both secure and resilient. Day-to-day, you will be hardening the network with advanced threat-detection practices—think real-time log analysis, strict firewall policy reviews, prompt patching, and well-documented incident response plans. All data protection flows through Veeam. I rely on daily image-level backups, off-site replication, and periodic restore tests, so you’ll need to stay on top of job success reports, storage consumption, and any failure remediation without waiting for me to ask. Support is part of the arrangement: when an issue or change request lands in the ticket queue, I expect timely follow-through and clear communication until closure...

    $250 Average bid
    $250 Rata-rata
    20 penawaran

    I am looking for a DevOps/Email Deliverability expert to perform a professional, "turnkey" installation of PowerMTA (PMTA) v5.0 (or latest stable) integrated with an email marketing control panel (e.g., Mailwizz, Mautic, or Mumara). The goal is a robust, high-performance mailing system capable of sending high volumes while maintaining a high sender reputation and reaching the inbox. Scope of Work 1. PowerMTA Installation & Configuration: â—‹ Full installation of PMTA on a Linux VPS/Dedicated server. â—‹ Configuration of config and accounting files. â—‹ Setting up Virtual MTAs and IP pooling. â—‹ Configuring SMTP users and bounce/FBL processing. 2. Domain & Deliverability Setup: â—‹ Full DNS configuration: SPF, DKIM (1024/2048 bit), DMARC, and ADSP. â—‹ rDNS (PTR) records setup for ...

    $30 Average bid
    $30 Rata-rata
    11 penawaran
    Ubuntu VPS with Port 25
    5 Hari left
    Terverifikasi

    I’m ready to purchase a Linux VPS that already has root access, SSH enabled, and—most critically—port 25 fully open so I can begin configuring an email server right away. The operating system must be Ubuntu. I will handle most of the administration myself, but I’d like the option to reach out for occasional guidance if something falls outside my expertise. If you can provision such a server immediately, please let me know the specs, datacenter location, and hand-over timeline. Credentials for both the root account and a secure console (or any control panel you include) should be provided upon delivery, and port 25 must be verifiably unblocked before transfer.

    $31 Average bid
    $31 Rata-rata
    17 penawaran

    Job description Allied Digital Services *Position Title: Deskside Technician – End User Computing Location- Australia, Singapore, Honk Kong, New Zealand, Taiwan *JOB DESCRIPTION The position of Deskside Technician – End User Computing performs troubleshooting, repair, and preventative maintenance of end user computing equipment and peripheral equipment at corporate locations. The candidate works on assignments of a diverse scope where analysis of data and hardware requires evaluation of identifiable factors. The candidate exercises judgment with supervision within the generally defined practices and policies in selecting methods and techniques for obtaining solutions and acts as a liaison between customers, departments, and within the organization to lead problem resolution....

    $155 Average bid
    $155 Rata-rata
    2 penawaran

    Job description Allied Digital Services *Position Title: Deskside Technician – End User Computing Location- Australia, Singapore, Honk Kong, New Zealand, Taiwan *JOB DESCRIPTION The position of Deskside Technician – End User Computing performs troubleshooting, repair, and preventative maintenance of end user computing equipment and peripheral equipment at corporate locations. The candidate works on assignments of a diverse scope where analysis of data and hardware requires evaluation of identifiable factors. The candidate exercises judgment with supervision within the generally defined practices and policies in selecting methods and techniques for obtaining solutions and acts as a liaison between customers, departments, and within the organization to lead problem resolution....

    $175 Average bid
    $175 Rata-rata
    2 penawaran

    I have a fresh Windows-based company laptop that must meet our internal security standards before it can go into daily use. I’m looking for an IT support engineer who can log in remotely, harden the system, and then configure iTunes so the device is ready for regular backups and app management. Security hardening comes first. I need a correctly scoped firewall profile, a reputable antivirus solution installed and fully updated, and full-disk encryption enabled so everything is protected at rest. If BitLocker is your preferred encryption tool that’s perfectly fine, but I’m open to alternatives as long as they deliver the same protection and don’t slow the machine down. Once the security layer is locked down, you’ll move on to iTunes for Windows. I rely on iTu...

    $93 Average bid
    $93 Rata-rata
    11 penawaran

    I need an experienced Windows infrastructure engineer available 40 hours a week, Monday-to-Friday, 9 am–5 pm (my local time), for the next three to six months. Your day-to-day priority is hands-on maintenance and support: keeping our Hyper-V virtualisation platform, Active Directory, and Office 365 environment fully patched, optimised, and trouble-free while always thinking “security first” in line with a Zero-Trust mindset. Alongside the routine work you will also help me formalise and document best-practice configuration “by the book”, carry out small-to-medium migrations between tenants or hosts, and ensure Veeam backups are running cleanly. Regular system updates, performance monitoring, and swift issue troubleshooting are expected without prompting&mdash...

    $592 Average bid
    $592 Rata-rata
    19 penawaran

    I need a Windows-savvy system professional in Bangalore to tighten every layer of security on my work laptop. The machine runs Windows 10/11 and is used daily for iTunes media management plus a specialized utility called “hxnoide,” so the new protections must not disrupt either application. Scope of work • Audit the current setup, note weak points and any traces of malware. • Deploy and configure a reliable antivirus/anti-malware suite, then verify real-time protection. • Tune the Windows Firewall for least-privilege outbound and inbound rules, adding exceptions only for iTunes and hxnoide where absolutely necessary. • Enable full-disk encryption (BitLocker) with TPM and recovery-key escrow. • Lock down local accounts with strong passwords, r...

    $70 Average bid
    $70 Rata-rata
    6 penawaran

    I run a Bales chat Telegram community that is already up and active. What I now need is someone who can take over the day-to-day scheduling of posts so the conversation stays lively even when I am offline. Here is what I expect: • Create and maintain a posting calendar that keeps members engaged and informed. • Use Telegram’s native scheduling feature (or a proven third-party tool, if you prefer) to queue the messages at the agreed times. • Coordinate with me on upcoming announcements so everything goes out in the right order. The group is fully set up, so no development or bot building is required at this stage—just smart, reliable message scheduling and a keen eye on timing. If your workflow includes analytics or light moderation, that would be a we...

    $427 Average bid
    $427 Rata-rata
    40 penawaran

    I need an expert to integrate AI into a computer system. Key areas of focus include: - Hardware integration - Software development Ideal skills and experience: - Experience with AI and machine learning - Proficiency in hardware and software integration - Familiarity with operating systems (Windows, macOS, Linux) Please share your relevant experience and approach.

    $21 / hr Average bid
    $21 / hr Rata-rata
    67 penawaran

    We are looking for a proactive System Administrator to manage the technical "backbone" of our education startup. You will be responsible for ensuring our course platforms are lightning-fast, our mastermind communication hubs are secure, and our data is protected. Your goal is to make sure our technology never gets in the way of our students' learning. Key Responsibilities Performance & Uptime: Manage our hosting environment (AWS/DigitalOcean/Google Cloud) to ensure 99.9% uptime, especially during high-traffic launch windows. Platform Maintenance: Oversee the backend of our LMS (Learning Management System), ensuring plugins, databases, and APIs are updated and functioning. Security & Backups: Implement "fail-safe" backup protocols and security headers to ...

    $9 / hr Average bid
    $9 / hr Rata-rata
    24 penawaran

    I already have a clean SwiftUI front-end for an OpenVPN app; the missing piece is the actual tunnel. Your role is to complete the Packet Tunnel Provider, wire it into the UI, and make the connection lifecycle rock-solid. What needs to happen • Build or finish the PacketTunnelProvider target, using the official OpenVPN library, so the app can connect, disconnect, and reconnect in the background without drops or hangs. • Surface real-time session stats (data in/out, duration, live throughput) to the SwiftUI views I’ve prepared. • Resolve the current issues with automatic reconnect after sleep/airplane-mode and cleanly handle edge-cases such as failed handshakes or revoked certificates. • Test everything on a physical iPhone; the simulator won’t cut it b...

    $147 Average bid
    $147 Rata-rata
    19 penawaran

    I'm seeking an expert to configure and enforce policies on Aruba ClearPass for our wireless network devices. Key tasks include: - Setup and enforce access control policies - Configure guest access policies - Implement compliance policies Ideal Skills and Experience: - Proven experience with Aruba ClearPass - Strong knowledge of wireless network security - Ability to configure complex policy frameworks - Troubleshooting skills for potential issues Your expertise will help secure and manage our wireless network effectively.

    $26 / hr Average bid
    $26 / hr Rata-rata
    13 penawaran

    I am seeking a Cisco SD-WAN expert to resolve a control plane reachability issue. Currently, my controllers (vManage, vBond, and vSmart) are hosted on prem behind a Unifi Gateway with port forwarding. After changing the vBond IP to a Public IP and implementing port forwarding, the controllers are experiencing the following issues: Control Plane Flapping: vSmart and vManage are constantly losing connections to the vBond (Logs show "Control No Active vBond" and "OMP Vsmart Down"). Application Failures: vSmart is periodically throwing Error: application communication failure when running CLI commands. NAT Loopback/Hairpinning: The controllers are in the same subnet (172.16.5.x) but are configured to point to the vBond via its Public IP, causing DTLS/TLS stability issues. P...

    $96 Average bid
    $96 Rata-rata
    8 penawaran
    AWS Audit, Backup & Training
    1 hari left
    Terverifikasi

    My team runs all of our workloads on EC2 and S3 and I want a seasoned AWS engineer to give our current set-up a health check, shore up security, and boost overall performance. The immediate priorities are: • Configuration review – walk through every EC2 instance, S3 bucket, IAM policy and networking rule, calling out weaknesses in security settings and opportunities for performance optimization. • Backup database build – spin up a separate RDS instance that every developer can connect to, then put a clear, manual promotion workflow in place so we can push approved data to production only when we decide. • Hands-on knowledge transfer – my staff are beginners, so I need short, practical training sessions that show them exactly how to navigate the AWS con...

    $20 Average bid
    $20 Rata-rata
    23 penawaran

    I need a fresh installation of Windows Server 2019 Standard with 2 VM's on bare-metal hardware(current running WinSrv 2012 Std) and need an expert hand to assist me remotely with setup and virtualization layer to spin up two guest machines for web hosting. Each VM must be configured so I can quickly use or back-up disks from or in qcow, qcow2 or raw image format without compromising security. Here is what the engagement looks like: — Prepare the host: enable and fine-tune the virtualization role, apply best-practice updates, and confirm networking is ready for public-facing HTTP/HTTPS traffic. — Create two VMs: allocate sensible CPU/RAM, attach storage that supports qcow/qcow2/raw, install the preferred Linux as guest OS, with a imported image to prove everything work...

    $169 Average bid
    $169 Rata-rata
    47 penawaran

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