Senior Linux Systems Administrator - Cape Town

We are an ISP in the Southern Suburbs of Cape Town in need of a Reliable, Enthusiastic, mature, self disciplined Senior Linux Systems Administrator.
Requirements:
Advanced Linux Administration,
Firm understanding of DNS and DNS hierarchical structure, Bind etc,
Firm understanding of Radius, RFC 2866, NAS, Realms etc,
Firm Understanding of POP3/SMTP and MX Configuration,
Advanced routing understanding and implementation,
Firm understanding of Cisco Configuration its proprietary protocols,
General Understanding of Wireless protocols and network design,
General Understanding of Mikrotik Hardware and proprietary protocols,
Firm Understanding of Datacentre design and Network Engineering (Hardware)
Must be a strong leader.
Must reside in the Southern Suburbs in Cape Town with own reliable transport
Must be flexible and willing to work extra hours if necessary.
Job Description:

Essential:
-Installation/configuration, operation and maintenance of hardware/software and related infrastructure, including R & D as required, with a view towards high availability;
Project:
-Assist with technical issues, R & D and support of operations staff in executing, testing and rolling out solutions
Architecture & Provisioning:
-Installation/rebuilding, configuration in accordance with standards and requirements, develop and maintain procedures, research and recommend innovation and automation;
Operations and Support:
-Monitoring, data and account management, including escalated customer issues, troubleshoot issues, root-cause analysis, repair and recovery from failures;

Maintenance:
-OS patches and upgrades, manage/add services, performance reporting/tuning;
Security:
-Monitoring, intrusion detection, maintain system standards, staff training, documentation.
Core (Required) Competencies:

IP:
-working knowledge of DHCP, DNS, SMTP, FTP, HTTP, RADIUS, ASTERISK etc.;
Services:
-LDAP, MTAs (pref. postfix/exim), SQL servers (pref. MySQL
OS:
-understanding of operating systems, from bare steel to network services; must have a good understanding of networking, from Ethernet to IP;
nix: proven proficiency with Linux or derivative, from user to systems and network management;
Scripting:
-proven experience with at least one of bash, python, Perl, PHP;
Data:

-Solid understanding of backup methodology and infrastructure.

Reporting:

-Must be able to provide accurate reports as requested by management
-Must be able to set out a project plan as requested by management

The candidate must be able to work under pressure, within a team or as an individual.

Salary offered will be negotiable on experience and qualification.

Please forward your CV, qualifications, recent salary slip, copy of your ID and availability to apply.