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!

De 147,448 opiniones, los clientes califican nuestro System Administrators 4.9 de un total de 5 estrellas.
Contratar a 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!

De 147,448 opiniones, los clientes califican nuestro System Administrators 4.9 de un total de 5 estrellas.
Contratar a System Administrators

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    29 trabajos encontrados

    Field Engineer – Network Installation | Arjeplog, Sweden Date: 19 August 2026 Start Time: 9:00 AM Local Time Location: Arjeplog, Sweden Client: Confidential / To be disclosed to selected engineer Job Overview We are looking for an experienced Field Network Engineer to support a scheduled network hardware installation at a customer site in Arjeplog, Sweden. Engineer Requirements CCNP or equivalent networking qualification/experience. Strong knowledge of basic router configuration. Good English communication skills and ability to communicate in the local language. Must carry a valid ID card and wear formal/business attire on site. Must review and understand the provided Method of Procedure (MOP) before attending site. Previous experience with network/router install...

    $25 - $50 / hr
    Local
    $25 - $50 / hr
    0 ofertas

    Customer: Knorr-Bremse Australia – Mackay (MKY) Site Address: 50 Enterprise Drive, Paget, QLD 4740, Australia Date: Monday, 17 August 2026 Start Time: 10:00 AM We are looking for a qualified Field Engineer / Network Engineer to attend site and complete a network hardware installation. Scope of Work Conduct a site risk assessment and take photographs of the rack where the Client’s network device will be installed. Share photographs and any identified risks with the coordinating Client representative before starting work. Inspect the supplied hardware kit and immediately notify the Client of any damage or missing items. Do not begin any installation work until approval is received from the coordinating Client representative. Build the connection between the provider router/NTU ...

    $26 / hr Average bid
    Local
    $26 / hr Oferta promedio
    1 ofertas
    Secure Ubuntu Droplet & SSL
    6 días left
    Verificado

    I need my Ubuntu droplet on DigitalOcean fully hardened and served behind Cloudflare SSL. Your first task is to configure Cloudflare so the site loads over HTTPS without warnings; Full or Full (Strict) is fine as long as it’s end-to-end encrypted. Once SSL is sorted, lock the server down. SSH is the only exposed service, so it must be bullet-proof: key-only logins, non-standard port (if practical), root login disabled, fail2ban (or similar) in place, and an automatic e-mail that alerts me—showing IP, user, date, and time—every time someone successfully authenticates. Complement that with: • UFW/iptables rules limiting inbound traffic to the essential ports. • Unattended security updates. • Log rotation and basic integrity checks (e.g., Lynis report or equ...

    $25 Average bid
    $25 Oferta promedio
    18 ofertas

    I need an Azure-savvy engineer to take a close look at my on-prem / Azure hybrid environment and squeeze cost and every bit of performance out of it for both local and remote users. Current setup •Hybrid – On-prem Hyper V virtual systems running Windows Servers, connected with Azure AVD with site to site connection. AD, DNS, GPO management etc. on prem. 1. On Prem Application: One Hosted on Hyper V virtual server (windows server 2025), it needs its drive to be mapped in user profile as a drive letter to make application work 2. AVD Application: Second Hosted on AVD host (Windows 11 multiple connections). It also needs its drive to be mapped in user profile as a drive letter to make application work. User profiles are saving centralized storage in Azure using FSLogix App acc...

    $148 Average bid
    $148 Oferta promedio
    38 ofertas

    I need hands-on help at our site to get a new network rack fully operational and to cover some light end-user support while we go live. Network side All the gear—routers, switches, firewalls, and wireless access points—is already on-site. Your job is to rack and stack each unit, connect power, patch copper and fiber exactly as shown on the diagrams (I’ll forward the latest versions before you arrive), and leave console cables in place so my remote engineers can jump in immediately. Once powered up, verify basic link status and let my team handle the advanced configuration. User side While the network equipment is booting, I’d like you to handle everyday issues for staff nearby: troubleshoot desktops and laptops that won’t boot or connect, sort out any pr...

    $39 / hr Average bid
    $39 / hr Oferta promedio
    13 ofertas

    I need an expert to install the latest versions of WAMPServer and PHPlist on my Windows 11 laptop via TeamViewer.nnRequirements:n- Experience with WAMPServer and PHPlist installationsn- Proficient in TeamViewer for remote assistancen- Windows 11 familiarity is a plusnnAdditional Information:nThe installation does not work natively due to multiple failed attempts resulting in "Bad DIRECTORY" messages. Registry edits were done to remove all WAMP entries, yet the issue persists. This seems to be related to a deeper problem in the Windows 11 Registry, requiring specialized troubleshooting and insights. Please ensure a smooth and error-free setup.

    $126 Average bid
    $126 Oferta promedio
    160 ofertas

    am looking for a Control Systems Engineer who can provide a ready-to-use Virtual Machine (VMware or VirtualBox) pre-installed and configured with the following software environments for training purposes: ABB Symphony Plus (Engineering and Operations environment). Honeywell Experion PKS (R410, R500, or R510). Requirements: The VM must be fully functional with all necessary engineering tools (Builder, Configuration Studio, etc.). A brief live demonstration (5-10 mins) via screen share is required before releasing the final payment to verify the software environment is working correctly. Provide download links for the VM files (OVA/VMDK).

    $305 Average bid
    $305 Oferta promedio
    44 ofertas

    I’m gearing up to release a new line of shapewear and I want women who range from slightly to very overweight to try on my clothing, record a few 1-2 minute videos; showing how they fit, and mention the benefits of the garment. My budget is $40 The shoot will be entirely product-focused: close-ups of fabric, smooth 360° turns, and natural movements that highlight before-and-after silhouettes. To keep things authentic, everything will be filmed in welcoming residential environments rather than a studio; think living rooms, bedrooms, or walk-in closets that feel lived-in and relatable. Deliverables: • 3–5 edited product-showcase videos (45–60 seconds each) per model • 8-9 photos for future campaigns • Simple lower-third captions identifying style...

    $112 Average bid
    $112 Oferta promedio
    26 ofertas
    Need AWS Expertise
    4 días left
    Verificado

    I run a small development company and I’m looking for a reliable AWS specialist to get our cloud foundation right and keep it running smoothly. Scope of work • Build out a clean AWS environment from scratch, including: – EC2 instance provisioning and right-sizing – VPC design with subnets, routing, and security groups – S3 bucket creation with the correct policies and lifecycle rules • Apply solid security configuration and hardening across all resources. • Tune the environment for performance and cost efficiency. • Deploy our existing web application and its companion database so they run fault-tolerant and can scale. • Document every step clearly so my team can maintain and extend the setup. I value clear co...

    $25 / hr Average bid
    $25 / hr Oferta promedio
    137 ofertas

    The project centers on tailoring our existing ERP so the HR, Inventory, and Finance modules align perfectly with the way we work. ERP Version & Platform Constraints - Version & Environment: Target environment is Odoo (v16 / v17) running on a self-hosted cloud VPS / environment. - Architectural Rules: All customizations must strictly follow standard Odoo module inheritance and ORM guidelines (no modifying core source files) to maintain database integrity and ensure seamless future version upgrades. - Performance Boundary: Dashboard queries must rely on indexed PostgreSQL custom views or clean ORM methods to avoid slow load times on heavy transactional data (, , ). Hybrid Focus (40% New Feature / 60% Module Optimization): New Feature Development (40%): - Building the Supplier Per...

    $440 Average bid
    Acuerdo de Confidencialidad
    $440 Oferta promedio
    107 ofertas

    We're hiring an experienced backend engineer to build, deploy, and maintain REST APIs for a security-focused, self-hosted incident response / case-management platform running on Linux. Responsibilities Design, build, and maintain REST API endpoints (Python, FastAPI) Deploy and operate the platform on Linux (Ubuntu) via Docker / Docker Compose Configure and harden supporting services: Nginx reverse proxy, MariaDB, Redis, Celery workers, Elasticsearch Manage authentication, secrets, and secure configuration (env vars, tokens, TLS certs, encrypted credentials) Build custom integrations/parsers/enrichers against the platform's REST API Monitor, troubleshoot, and tune services (logs, container health, resource sizing) Apply security best practices throughout (least privilege, input ...

    $540 Average bid
    $540 Oferta promedio
    66 ofertas
    Personal Bulk SMTP Server Setup
    4 días left
    Verificado

    I want a complete, ready-to-use SMTP server that lives on my Windows machine and lets me push out high-volume campaigns without the usual caps yet still places messages in the inbox, not the spam folder. Please build, configure, and fine-tune everything so the service runs smoothly with no username-and-password layer (that requirement is intentional because the environment is fully firewalled on our side). The core of the job is the full installation and optimisation of the SMTP engine you feel is best for Windows—MailEnable, hMailServer, PowerMTA, or another proven option are all fine as long as deliverability is strong. I also need the surrounding essentials: correct PTR, SPF, DKIM, and DMARC records, IP warming guidance, plus any queue-management or throttling tweaks that help ke...

    $434 Average bid
    $434 Oferta promedio
    45 ofertas

    We are a boutique managed IT services company (MSP) based in the Greater Toronto Area, supporting 100+ business clients across a wide range of industries. We're expanding our after-hours coverage and need a remote L1 technician to handle overnight technical escalations. Scope of work Troubleshoot server-related issues: network drive/share connectivity, server errors Provide remote workstation support, including VPN connectivity assistance Support client production applications at the access/login/licensing level — AutoCAD, SketchUp, Bluebeam Revu, Adobe Creative Cloud, Blender (not application training or how-to guidance) Triage and begin remote work within a 2-hour response window on escalated issues Escalate anything beyond L1 scope to our on-call senior technicians Handle b...

    $9 / hr Average bid
    Acuerdo de Confidencialidad
    $9 / hr Oferta promedio
    28 ofertas

    We are an MSP based in the Greater Toronto Area, supporting 100+ business clients. We're hiring a remote L1 technician for overnight technical support, 9:00 PM–5:00 AM ET (weekends included). What you'll do Troubleshoot server/network drive connectivity issues and VPN access Provide remote workstation support Support client apps at the access/login/licensing level (AutoCAD, SketchUp, Bluebeam, Adobe CC, Blender) — not training or how-to guidance Handle basic ticket intake from 9-10 PM ET before our overnight admin comes online; admin handles intake/logging after that Triage within a 2-hour response window; escalate beyond L1 to on-call senior techs Required Solid L1 troubleshooting (networking, VPN, remote desktop) Comfortable working independently overnight Clear...

    $7 / hr Average bid
    $7 / hr Oferta promedio
    15 ofertas
    Compliance Wired Network Testing
    3 días left
    Verificado

    Objectives • Obtain an independent, manual penetration test to validate the security of the Selcomm platform and the isolation of customer environments. • Produce a formal report (with a redactable version) to evidence security assurance to enterprise customers. Environment (context) Solution: Selcomm billing platform — dedicated (non-cloud) software; virtualised Windows + Linux/Informix Hosting: Production: NTT data centre. Access/interfaces: Per-customer dedicated VLANs; site-to-site VPN; SSL/TLS and sFTP. No wireless Target list / scope (please price individually and combined) • A — External infrastructure: internet-facing VPN endpoint(s), any public web/portal, mail gateway. • B — Web application: authenticated & unauthenticated test of the Se...

    $2661 Average bid
    $2661 Oferta promedio
    64 ofertas
    Work Email Spam Reduction
    3 días left
    Verificado

    I’m drowning in junk that keeps slipping into the work mailboxes on my own domain, so I need an email-security specialist to tighten things up fast. The accounts are not on Gmail or Outlook; they’re hosted directly on my domain, and right now the basic filtering isn’t doing the job. Here’s what I’m after: audit the existing server set-up, update any DNS records (MX, SPF, DKIM, DMARC), tune or replace the current spam-filter rules, and leave me with a clean inbox that still accepts every legitimate message. You’ll get temporary access to the control panel and DNS so you can: • Inspect mail logs and current filter scores • Correct or add SPF, DKIM and DMARC records • Configure SpamAssassin (or a similar tool) and fine-tune thresholds ...

    $28 Average bid
    $28 Oferta promedio
    33 ofertas

    I run a small but growing company whose staff is scattered across several time zones. Because we have no physical headquarters, every employee depends on a reliable, secure technology stack to stay productive. I need an experienced IT systems manager who can step in and own that environment from end to end. Day-to-day you will: • Monitor and maintain all user workstations, keeping operating systems, apps and security patches current. • Administer accounts, permissions and backups in our cloud services (you’ll help me choose or streamline them where necessary). • Act as first-line support for the team: diagnose connection issues, resolve software conflicts and keep Zoom—our primary meeting platform—running smoothly. • Document processes so onboar...

    $10 / hr Average bid
    $10 / hr Oferta promedio
    28 ofertas
    Eliminate Spam on Ionos Server
    3 días left
    Verificado

    Our company mailbox on an Ionos-hosted server is being flooded with unwanted messages and I need an expert to stop them quickly and cleanly. The mail flow passes through Ionos before it reaches Microsoft Outlook on the desktop, so whatever you implement must sit at server level and not rely on individual client rules. What I already know • The problem is on the company email server, not a personal inbox. • We run on the Ionos mail platform (not Exchange or Google). • Spam ranges from phishing attempts to the usual marketing clutter—if it’s malicious, I want it blocked; if it’s legitimate but irrelevant, I want it routed to junk automatically. What I’m hoping you will do 1. Audit current MX, SPF, DKIM and DMARC records, then correct or harden...

    $23 Average bid
    $23 Oferta promedio
    29 ofertas

    I'm seeking an experienced network engineer with Wireless ISP (WISP) expertise for a rural network setup. The project involves: - Network design and planning - Installation and configuration of routers, switches, wireless access points, antennas, and towers - Network monitoring and troubleshooting Ideal Skills and Experience: - Proven experience in WISP projects - Strong knowledge of network equipment and rural deployment challenges - Excellent troubleshooting skills - Ability to work independently and manage project timelines

    $19 / hr Average bid
    $19 / hr Oferta promedio
    25 ofertas

    I need hands-on hardware support for a group of office desktops and laptops. The priority is hardware support, and the machines are showing a mix of performance slow-downs, intermittent hardware failures, stubborn software-installation problems, and the occasional network conflict that boots them off our LAN. You’ll be expected to run full diagnostics, identify failing components, repair or replace them, install the required software, and confirm that each computer rejoins the network cleanly. Experience with Windows 10/11, BIOS utilities, imaging tools such as Clonezilla or MDT, and basic networking commands will make the work go faster. Deliverables • A brief troubleshooting report for every affected machine • Completed repairs or documented recommendations when repla...

    $9 / hr Average bid
    $9 / hr Oferta promedio
    19 ofertas
    Hetzner VMWare & Mikrotik Setup
    2 días left
    Verificado

    I’m moving a bare-metal server at Hetzner over to a fully virtualized environment and want the foundation built right the first time. Here’s what I need: • Clean installation of the latest stable ESXi on the Hetzner host, followed by all current updates and patches. • Basic performance tuning so the hypervisor is ready for production workloads (CPU scheduling, datastore alignment, SSD caching if available, etc.). • Creation of well-structured subnets for multiple tenant VMs. • Firewall rules and protection logic on my MikroTik RouterOS appliance that will sit in front of the ESXi host, including NAT, filter, and basic DDoS hardening. I'm awaiting to order the server and necessary requirements for the setup; you will have to provide all require...

    $142 Average bid
    $142 Oferta promedio
    28 ofertas

    I need a specialist to configure and verify DNS settings on my domain to ensure seamless integration with three SMTP providers: AWS, MailGun, and Brevo. The tasks include setting up SPF, DKIM, and DMARC records, ensuring all configurations are correct, and conducting thorough testing to confirm functionality across all providers. I am facing issues with domain verification due to incorrect DNS details. I need assistance in resolving this and ensuring proper configuration for AWS, MailGun, and Brevo.

    $21 Average bid
    $21 Oferta promedio
    62 ofertas

    I need assistance connecting my Wi-Fi laser printer to a Windows desktop. Requirements: - Experience with Windows OS - Knowledge of Wi-Fi printer setup - Troubleshooting skills for connection issues Ideal Skills: - Familiarity with network settings - Previous experience with printer installations

    $150 Average bid
    $150 Oferta promedio
    29 ofertas

    I need to replace an old gigabit switch and access point with a Ubiquiti Unifi Access Point at my home in Sydney, Australia. Requirements: - Install Ubiquiti Unifi Access Point - Setup mesh network Ideal Skills and Experience: - Experience with Ubiquiti products - Networking knowledge - Detail-oriented and reliable Please provide detailed project proposals.

    $530 - $1060
    Local
    $530 - $1060
    0 ofertas

    We are a 20-person company that now needs a dedicated professional to own our entire IT environment. The core of the job is keeping everyday operations smooth while steadily raising our security posture. We are looking for someone who uses modern tools, ideally with AI, to help automate IT workflows. This is not a full time role. It is for 10-15 hours per week. Scope of responsibility • Devices – enrolment, patching, inventory and lifecycle management for laptops and mobiles. • Google Workspace administration – user provisioning, group policies, shared drives, email routing and licence optimisation. • Identity & access management – maintain SSO, MFA, least-privilege roles and onboarding/off-boarding processes. • Security awaren...

    $651 Average bid
    Local
    $651 Oferta promedio
    10 ofertas

    I need help with my laptop to check and delete unauthorized access. Ideal skills and experience: - Experience with security and access management - Familiarity with various operating systems - Ability to work efficiently and securely

    $150 Average bid
    $150 Oferta promedio
    41 ofertas

    I need a VPN setup to enable secure remote work for my employees. The VPN should be both Site-to-Site and Remote Access. Requirements: - Connects securely: Desktops, Laptops, and Servers - Standard encryption Ideal Skills and Experience: - Proven VPN setup experience - Familiarity with various encryption protocols - Ability to configure for multiple device connectivity

    $22 / hr Average bid
    $22 / hr Oferta promedio
    61 ofertas

    I'm having trouble connecting my V39 scanner to my desktop via USB. The error message states "No device found." I'd like someone who can diagnose and fix this issue. Ideal skills and experience include: - Experience with V39 scanners - Proficiency in troubleshooting USB connection issues - Familiarity with Windows, MacOS, or Linux (please specify your OS)

    $484 Average bid
    $484 Oferta promedio
    53 ofertas
    Urgent DDoS Mitigation Needed
    20 horas left
    Verificado

    My e-commerce site is currently under an active DDoS attack. No protective measures are in place yet, and service interruptions are starting to hurt sales and SEO. I have full administrative access to the Nginx server, so any configuration changes or security software installs can be done immediately. I need an experienced DDoS mitigation specialist to: • Restore site availability quickly by filtering malicious traffic and keeping legitimate customers online • Harden the existing Nginx stack with rate-limiting, connection throttling, and optimized firewall rules • Configure and fine-tune an external protection layer (e.g., Cloudflare, AWS Shield, or comparable scrubbing/WAF service) • Deliver a brief post-incident report outlining what was done, residual risks,...

    $98 Average bid
    $98 Oferta promedio
    24 ofertas

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