Hire the Best System Administrators
in the United Kingdom
London, United Kingdom
Do you need a reliable System Administrator to keep your servers secure, optimized, and running 24/7? I specialize in system administration, server management, and cloud infrastructure, helping businesses maintain stability, scalability, and security across hybrid environments. ⚙️ What I Do I provide end-to-end system administration and technical support for both Windows and Linux ecosystems — ensuring high performance, strong security, and minimal downtime. Core Services: 🧩 Windows & Linux Server Management (Ubuntu, CentOS, Red Hat) 🔒 Active Directory, Group Policy, and User Management ☁️ Microsoft 365 & Azure Administration (VMs, Azure AD, IAM, MFA) 🧠 Network Administration & Security (VPNs, Firewalls, Load Balancing) 💾 Backup & Disaster Recovery (Veeam, Acronis, Windows Backup) ⚙️ Server Virtualization (VMware, Hyper-V, Proxmox) 🔧 Automation & Scripting (PowerShell, Bash) 🛠️ Remote IT Support & Troubleshooting (TeamViewer, RDP, AnyDesk) 🌐 Tools & Technologies Operating Systems: Windows Server, Ubuntu, CentOS, Red Hat Platforms: Azure, Microsoft 365, VMware, Hyper-V, Proxmox Networking: Cisco ASA, Fortinet, pfSense, Nginx, HAProxy Monitoring: Nagios, PRTG, SolarWinds Backup: Veeam, Acronis, Windows Backup ⚡ Why Clients Choose Me ✅ 20+ successful system administration projects with 5-star results ✅ Proactive monitoring to prevent issues before they occur ✅ Fast response times and detailed documentation ✅ Experienced in both on-premises and cloud environments ✅ Dedicated to delivering secure, efficient, and reliable IT solutions Let’s optimize your systems for performance, security, and uptime. 💬 Contact me to discuss your infrastructure and how I can help streamline it.
- System Administration
- Windows Server
- Network Administration
- Server Virtualization
- Microsoft Windows
- System Security
- Firewall
- Server Administration
- IT Support
- Office 365
- Microsoft Azure
- Microsoft Active Directory
- Tech & IT
- IT Infrastructure
- Active Directory Federation Services
London, United Kingdom
Hi, I'm Nana! I've helped businesses migrate email platforms safely, securely, and without downtime for over 20 years. During that time I've also helped them fix spam issues and set up their domain on online platforms. I hold a Microsoft MCSE email specialization and have extensive expertise with Google Workspace, Microsoft 365, and various other email systems. Having founded and managed my own company, I understand the challenges you face. Let me handle the technical side, so you can focus on your core business. My guarantees: No downtime. No emails lost. No data lost. No Junk mail. Post-project validation. Security and privacy. Satisfaction - 7 days post service support. You shouldn't worry about email setup, migration, or delivery issues. Focus on your main tasks and leave all your email worries to me. I have over 20 years of experience with every kind of email system you can imagine and I am certified. Things I can do for you: * Custom domain registration and email setup on - Google Workspace, Microsoft 365, Microsoft Outlook, Zoho Mail, iCloud Mail, cPanel webmail, Fastmail, Bluehost, Godaddy, Rackspace, Proton Mail, Yahoo Mail, Yandex Mail, Namecheap Mail, Zimbra and any other email platform. * Email migration with no downtime. Seamless migration to or from any email platform to another. You emails, your contacts and your calendar items will all be moved. * Verify your domains, setup secondary domains and aliases. * Setup email forwarding * Setup and configure shared mailboxes and shared calendars. * Setup and configure DNS records to avoid spam folder and fix delivery issues: SPF, DKIM, DMARC, TXT, MX, etc. * Configure mail clients like Outlook, Thunderbird, etc. * Configure email marketing tools and provide audits and recommendations to improve ongoing inbox placement and campaign success. I look forward to helping you. If you have any questions message me to discuss.
- System Administration
- Information Security
- Email Deliverability
- DNS
- Google Workspace
- Migration
- Microsoft Active Directory
- Domain Migration
- cPanel
- GoDaddy
- Google Workspace Administration
- Webmail
- Data Migration
- Archiving
Chester, United Kingdom
I simplify complex Microsoft 365, Entra ID, Azure, and Intune environments. With over 10 years of experience and advanced certifications like SC-100, MS-102, and Microsoft Certified Trainer (MCT), I provide secure, compliant, and efficient cloud and endpoint solutions tailored to modern businesses. 🔹 Expertise Highlights ✅ Microsoft 365 & Exchange Online Tenant configuration, email/domain migrations, Office 365 setup and troubleshooting Deliverability improvement (SPF, DKIM, DMARC) Spam filtering, header analysis, alias routing, and DNS via GoDaddy ✅ Microsoft Intune & Endpoint Management Intune MDM/MAM, Autopilot deployment, Conditional Access policies Apple/Windows/Android/macOS device support via JAMF, Defender, and Entra ✅ Azure & Entra ID Azure AD, Entra ID identity management, Conditional Access, SSO (Okta, ADFS) Hybrid/cloud server migrations, VM provisioning, federation services ✅ Security, Compliance & Governance Microsoft Purview (DLP, encryption labels, retention/eDiscovery) Endpoint protection (Defender, BitLocker), ISO/NIST security frameworks SC-100-level cloud security architecture and policy enforcement ✅ Tier 2/3 IT Support & MSP Experience Remote support for Windows/macOS/Linux, VPNs, DHCP/DNS Ticketing & RMM (ServiceNow, Jira, ConnectWise, Autotask, Atera) IT Glue, SharePoint KB, end-user documentation, onboarding/offboarding ✅ PowerShell & Automation Scripting for mailbox/user provisioning, policy enforcement, licensing Intune Win32 App deployment, REST API automation, bulk updates 💬 Extras Clear, fluent English (verbal & written) Hands-on experience with UK, US, and international clients MSP-ready and client-facing with rapid, high-quality delivery Strong documentation discipline and troubleshooting mindset Professional demeanor, proactive communication, and knowledge sharing 🏅 Certifications: SC-100 – Microsoft Cybersecurity Architect MS-102 – Microsoft 365 Administrator Expert SC-300, MS-500, MS-100, PL-900, AI-900, AZ-900, DP-900 Microsoft Certified Trainer (MCT) AWS Cloud Practitioner, Power Platform Fundamentals 🕘 Availability: Flexible — available for project-based and ongoing support across AEST, GMT, and EST time zones🧰 Tools: ServiceNow, JAMF, SuperOps, IT Glue, TeamViewer, Autotask, Splashtop📄 Approach: I provide detailed documentation, SOPs, and training to support sustainable IT operations If you need help with Microsoft 365, Exchange, Intune, Azure, Entra ID, or general IT support, I’m ready to deliver fast, secure, and effective results. Let’s work together to elevate your tech stack.
- System Administration
- Microsoft Active Directory
- Microsoft Azure
- Office 365
- Microsoft Outlook
- Technical Support
- Incident Management
- Ticketing System
- Customer Support
- Troubleshooting
- Email Deliverability
- Microsoft Exchange Server
- Email Support
- Helpdesk
- Communication Etiquette
New Addington, United Kingdom
I design fit-for-purpose infrastructure that holds up under pressure without torching the budget. I build and run multivendor production environments where systems must behave predictably through load, change, and failure. I own systems end-to-end: architecture, deployment, operations, and incident response. I kill manual toil with IaC and repeatable workflows, eradicate configuration drift, convert tribal knowledge into clean diagrams, runbooks, and a single source of truth. Security is built into the design through segmentation, least-privilege access, and automated controls, with systems documented and monitored to support audits, security incidents, and ongoing operations. I’ve seen the carnage of failed changes, vague handovers, audit nightmares, and undocumented systems that bleed operational risk daily. That’s why I build lean, observable, boringly stable platforms that scale without drama and cost less to run long-term. Experienced across enterprise, data center, and cloud environments, with industry exposure spanning telecoms, vendor support, MSP operations, financial services, low-latency trading, and large-scale service providers. 💻TECH SKILLS🥷 🌐Networking: WAN, LAN, WLAN(Meraki, UniFi), VLANs, VXLANs, IPv6, NAT, RIP, OSPF, BGP, VRF, ACLs, QoS, VPNs, DHCP, DNS, NFV 📦Virtualization: VMware, OpenStack, Hyper-V, KVM, Proxmox, Docker, SR-IOV, SAN ☁️Cloud: AWS(EC2, VPC, Flow Logs, S3, IAM, CloudWatch, WorkSpaces, WAFR), Azure(VMs, AD, Networking), Google Workspace, Office 365 ⚙️OS: Cisco IOS, Cisco NX-OS, Dell OS10, Arista EOS, Windows Server(PowerShell, AD, Group Policy, Exchange), Linux(Bash, IPtables, Permissions, Nginx), macOS 🔐Security: Firewalls(Palo Alto, FortiGate, SonicWall), CASB(Netskope), SIEM(Rapid7), MDM(MaaS360), IAM(Okta, Centrify, CyberArk), Email(Mimecast) 🤖Automation: Python(Jinja2), APIs(RESTful, NETCONF, RESTCONF), XML, JSON, YAML, YANG, Terraform, Ansible, GitHub 🛠️Tools: Wireshark, Nmap, iPerf, Cisco CIMC, Dell iDRAC, Dell OpenManage, Veeam, OpenVAS, GitHub, Postman, ManageEngine, PRTG, Zabbix, Observium, Graylog, Passbolt, NetBox, Visio, Itemit
- Linux
- Linux System Administration
- Network Security
- Windows Administration
- Firewall
- Python
- Network Engineering
- Software-Defined Networking
- Network Design
- Microsoft Azure
- Cisco Certified Network Professional
- Automation
- DNS
- DevOps
London, United Kingdom
I build infrastructure and automation systems that run reliably in production — not prototypes, not proofs of concept. With 15+ years across cloud, on-premises, IoT, and network environments, I solve operational problems with clean engineering and documented, maintainable code. I work across three focused service lines: ☁️ Cloud Infrastructure & IoT Systems I design and operate AWS environments that stay up under real-world conditions. My most recent engagement was a 5-year contract with a Norwegian IoT company — 100+ connected devices across 50+ distributed sites, maintained at 99.9% uptime with zero security incidents. What I deliver: AWS architecture (EC2, VPC, S3, IAM, IoT Core) — designed for reliability and cost efficiency Zero-downtime migrations from on-premises to cloud IoT fleet management (Balena, AWS IoT Core, MQTT, embedded Linux, Raspberry Pi) Full observability stack: Prometheus, Grafana, Zabbix — with automated alerting and self-healing Results from production: 40% MTTR improvement, 60% reduction in manual operational tasks, 75% reduction in IoT device connectivity issues. 🔧 Network Automation & Infrastructure-as-Code I automate network infrastructure the right way — with a source of truth, not ad-hoc scripts. My approach: NetBox as the authoritative data source, Terraform and Ansible for provisioning and configuration management, Python tooling for operational workflows. Hands-on experience with: MikroTik RouterOS and CHR (including physical-to-cloud migration) VPN architecture, VLAN design, firewall rules, QoS, per-user traffic management RouterOS scripting for automated network operations Ansible playbooks across 50+ distributed Linux servers and network devices ⚙️ Python Automation & Scheduled Services I build Python services that replace manual workflows — properly engineered, containerised, and deployed in production. Recent example: a scheduled SEO monitoring service built entirely in Python (APScheduler, FastAPI, httpx, Docker Compose), deployed on a VPS. It runs weekly scans across client websites using a custom 13-category scoring engine (PageSpeed Insights API, CrUX API, custom crawler — no third-party SEO data costs), fires Slack and email alerts when scores drop below defined thresholds, and auto-remediates common issues directly at the CMS data layer (WordPress/RankMath via WP-CLI and REST API). Claude API is used narrowly for plain-English alert summaries and monthly digests — the scoring and remediation logic is pure Python. This is the kind of automation I build: scheduled, reliable, observable, and genuinely useful.
- Microsoft Windows PowerShell
- DHCP
- DNS
- Perl
- Python
- Java
- SQL
- Elasticsearch
- Docker
- Cacti
- Bash Programming
- SNMP
Romford, United Kingdom
Main expertise: - Linux administration. - Bash scripting. - Web server administration (Apache, Nginx). - Database programming and administration (MySQL, MariaDB, Sqlite, MS SQL, MongoDB, PostgreSql). - Active directory administration (OpenLDAP). - Blockchain administration. - Source version control (Git/GitHub/GitLab/Bitbucket/Bazaar/Launchpad). - Building backend applications using PHP, NodeJS. - CMS installation and configuration - Wordpress, Joomla, Magento, OpenCart, etc. - Shopping cart payment gateway integration. - Website speed optimisation. - SSL certificate installation.
- System Administration
- Linux
- Linux System Administration
- MySQL
- cPanel
- Domain Migration
- Plesk
- Database Optimization
- SQL
- PHP
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