Senior DNS Administrator

About the role

Avensys is seeking an experienced Senior DNS Administrator to manage and optimise DNS services across its enterprise Windows Server environment. The role involves ensuring high availability, security and performance of DNS infrastructure while collaborating with cross‑functional teams.

Key responsibilities

• Administer and maintain DNS services on Windows Server platforms.
• Manage DNS zones, records (A/AAAA, CNAME, MX, PTR, TXT, etc.) and configure primary/secondary servers.
• Configure forwarders, conditional forwarders and stub zones.
• Maintain Active Directory‑integrated DNS, including replication and AD integration.
• Troubleshoot DNS resolution, connectivity, propagation and performance issues.
• Monitor DNS health and proactively address potential problems.
• Support DNS changes, migrations, upgrades and infrastructure projects following change‑management procedures.
• Collaborate with network, systems, security and application teams to resolve DNS‑related incidents.
• Maintain documentation, configuration standards and operational procedures.
• Ensure DNS infrastructure adheres to security and availability best practices.

Required profile

• Minimum 7 years of hands‑on DNS administration experience.
• Strong background with Windows Server DNS and Active Directory integration.
• Experience working in enterprise production environments with 24×7 support.

Required skills

• Windows Server DNS
• Active Directory
• TCP/IP and DHCP fundamentals
• nslookup and dig command‑line tools
• PowerShell scripting for DNS management
• Knowledge of DNS security concepts such as DNSSEC (advantage)

What we offer

• Competitive base salary with attractive company benefits.
• Collaborative and fun work environment.
• Strong career progression opportunities.