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

Requests

  • 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

Monitoring

1) Respond to Nagios warnings

2) Maintain Naigos checks

  1. 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

  1. Prepared to

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

secondary member

Required

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

Desired:

• 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

administration

• 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,

etc.)

C

AWK

Perl

Python

AT&T

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

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