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DATE ADDED: Mon 08/10/2018

DNS Administrator (US Citizen Required)

Washington, USA


Job Description

Job Responsibilities:

1. DNS Change Requests

  • Add/remove forward and reverse DNS entries

  • Process DNS server configuration changes

  • Manage DNS zone delegations

  • Process MX record changes

2. DNS Support Requests

  • Troubleshoot downstream DNS server problems

  • Interact with WAN and LAN administrators

  • Articulate the reasons for DNS resolution failures, perceived or otherwise, using appropriate DNS and network utilities

  • Generate DNS metrics, statistics and reports using shell scripting and programming languages such as bash, windows shell scripts, expect, tcl, powershell, vbs, javascript, php and python.

3. SMTP Support Requests

  • Conduct e-mail traces for general troubleshooting

  • Respond to abuse complaints


4. Anti-Virus and Spam maintenance

  • respond to virus outbreaks

  • respond to inquiries regarding anti-virus behavior

  • respond to inquiries regarding anti-spam behavior

  • Maintain SMTP logs and generate statistics using perl and shell scripting


5. Server maintenance

  • Track bugs and security vulnerabilities

  • Track and apply software updates

  • Cisco ESA

  • Infoblox DDI (DNS/DHCP/IPAM)

  • Linux/UNIX software

  • Sendmail

  • Postfix

  • BIND



  • OpenSSH and OpenSSL

6.  Password maintenance

  • change production administrative (root) passwords monthly

  • encrypt and distribute monthly password lists

7. Monitoring

  • Respond to Solarwinds/network monitoring system notifications

  • Maintain Solarwinds / network monitoring configuration, service checks, and configuration information


8. DNS/SMTP Architecture

  • Analyze effect of MX record configuration on SMTP flow

  • Analyze effect of anti-spam and anti-virus policies on SMTP flow

  • Determine DNS best practices for delegated zones and slave zones

  • Maintain network and application layer diagrams using Visio

  • Develop and maintain Disaster Recovery and Remote Management procedures

  • Advise on future deployment and configuration of gateway SMTP and DNS services.

  • Prepared to participate in the team on-call rotation schedule as either a primary or secondary member

  • Utilize an electronic Change Control and trouble-ticketing system to respond to end-user DNS & SMTP related issues and to track network and architectural changes to the network environment.

  • Ability to communicate clearly and succinctly with a United States customer base, both in person, electronic communications, and via voice / video phone calls.



  • Candidate must be a US Citizen

  • 6+ years of progressive technical (hands-on) experience related to Linux/Unix System Administration in an enterprise server environment

  • 6+ years of progressive technical (hands-on) TCP/IP networking experience

  • 6+ years of progressive technical (hands-on) DNS administration experience in an enterprise environment

  • 6+ years of progressive technical (hands-on) SMTP administration experience in an enterprise environment

  • Ability to organize and prioritize numerous customer requests in a fast paced, deadline driven environment



  • Security-related Network (Cisco) and Operating Systems (Redhat) certification or training

  • Microsoft Visio

  • Splunk and Syslog

  • Common monitoring applications (e.g. Solarwinds, Nagios, OpenView, Ionix, Zabbix)

  • Common monitoring protocols (e.g. SNMP )

  • Cisco ESA / IronPort SMTP Appliances

  • Postfix, Sendmail, Microsoft Exchange or Lotus Notes

  • Authentication and encryption management (esp. using SSH, PGP, and SSL)

  • Infoblox DNS Appliances

  • Self-starter requiring limited direction and supervision

  • Experience with at least one of the following programming languages:

  • Bourne Shell (sh, ksh, bash, zsh, etc.)

  • C

  • AWK

  • Perl

  • Python

  • Expect

  • TCL


Company Description
IT Professional Services Firm focused on Information Communications Technologies - #removed#

Role: DNS Administrator (US Citizen required)
Job Type:
Location: Washington,

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