AT&T System Administrator (Government) in Washington, District Of Columbia

This position has responsibilities

for the day to day operations of a large national email gateway, management

of DNS services for the organization, and the upkeep and maintenance of the

servers/appliances on which the services run.

  1. DNS Change Requests
  • Add/remove forward and reverse DNS entries

  • Process DNS server configuration changes

  • Manage DNS zone delegations

  • Process MX record changes

  1. DNS Support Requests
  • Troubleshoot downstream DNS server problems

  • Interact with WAN and LAN administrators outside the U.S. Courts

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

  1. SMTP Support


  • Conduct e-mail traces for general troubleshooting

  • Respond to abuse complaints from persons outside the U.S. Courts

  • Anti-Virus and Spam maintenance

  • respond to virus outbreaks

  • respond to court inquiries regarding anti-virus behavior

  • respond to court inquiries regarding anti-spasm behavior

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

  1. Server maintenance
  • Track bugs and security vulnerabilities

  • Track and apply software updates

  • Polaris 8/9/10 patch clusters

  • IronPort C60

  • Infoblox DNSOne

  • UNIX software

  • sendmail

  • postfix

  • BIND

  • OpenSSH and OpenSSL

  • GNUpg (PGP encryption)

Password maintenance

1) change production administrative

(root) passwords monthly

2) encrypt and distribute monthly

password lists


1) Respond to Nagios warnings

2) Maintain Naigos checks



  • 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

  1. Prepared to

participate in the team on-call rotation schedule as either a primary or

secondary member


Skills, Experience, and Education :

• 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

• TCP/IP networking

• DNS administration

• Ability to organize and prioritize

numerous customer requests in a fast paced, deadline driven environment

Required Clearance: Public Trust

type background check with finger-printing and drug screening


• Security-related Network (Cisco)

and Operating Systems (Redhat) certification or training

• Microsoft Visio

• Splunk

• Common monitoring applications

(e.g. Solarwinds, Nagios, OpenView)

• IronPort SMTP Appliance

• Postfix, Sendmail, qmail, or Exim


• Authentication and encryption

management (esp. using SSH, PGP, and SSL)

• Infoblox DNS Appliance

• Self-starter requiring limited

direction and supervision

• Experience with at least one of the

following programming languages:

Bourne Shell (sh, ksh, bash, zsh,







is an Affirmative Action/Equal Opportunity Employer and we are committed to

hiring a diverse and talented workforce. EOE/AA/M/F/D/V