RACHEL "Mandi" WALLS
Objective:
To continue to work as a Linux System Administrator in high performance environments. To help developers and business team members deliver better products using technology.
Occupational Experience:
AOL, LLC, Dulles Virginia
Principal Systems Administrator, August 2007 - Present
Senior Systems Administrator, March 2006 - August 2007
Systems Administrator, June 2004 - March 2006
- Primary administrator responsible for www.aol.com user-facing web server farms, including uptime, performance, scaling, backup configurations, monitoring, documentation
- Maintenance and scaling of AOL Channels farm, including writing custom TCL for performance enhancements, managing 150+ DNS names, and working with 50+ development and QA resources
- Design and Implementation of web server farms as projects near completion
- Work closely with business and development team members to ensure best possible delivery of web content to users
- Debugging, troubleshooting, reporting of issues on Apache / Tomcat and AOLServer
- Use metrics and monitoring tools to determine impact of application changes to the overall stability and performance of large scale projects
- Create custom tools to collect and parse performance data for production applications
Stratford University, Falls Church, Virginia
Adjunct Instructor in Computer Information Systems September 2002 - March 2006
Unix Lead Instructor
Classes Taught:
- CIS150 Advanced Client-Sever Technology
- CIS162 Unix Operating Systems
- CIS225 Active Directory Infrastructure Design
- CIS230 Active Directory Security Infrastructure Design
- CIS255 Implementing and Supporting Secure Networks
- CIS330 Advanced Unix Operating Systems
Digicon Corporation, Rockville, Maryland
Linux Systems Administrator, March 2002 - June 2004
Assigned to National Human Genome Research Institute, NIH
- Installation and maintenance of Linux servers and workstations
- Resource planning and hardware recommendations for servers and cluster hardware
- System and network security as it pertains to Apache, SSH, and other services on Linux
- Management of users, resources, and scientific software on Linux and Solaris
- Packaging of custom software for security upgrades as required by NIH security guidelines using the package management tool RPM
- Presentation and documentation of system information as necessary
Invicta Networks, Herndon, Virginia
Software Engineer, January 2001 - February 2002
Software development concentrating on perl, PHP, and database software on the Linux platform, along with Linux system administration duties
- Software development using XML, perl, perl/Tk, PHP, and MySQL
- Systems Integration of Invicta products with Linux
- Administration of Linux servers, workstations, and test equipment, including backups
- TCP/IP Networking including network design, cabling, installation and routing
- Administration of network services including NFS, NIS, SMTP, LDAP, and Linux firewalls
Litton TASC, Chantilly, Virginia
Member Technical Staff, January 2000 - January 2001
Sun Solaris Administrator for data warehouse web site
- Administration of Solaris 2.7, Apache 1.3
- Development of site software using perl, PHP, and MySQL on Apache/Solaris
- Resource planning for Solaris and Oracle, including off-site backup
UUNet Technologies, Dulles, Virginia
Install Engineer I, July 1999 - December 1999
Technical support for UUNet's SOHO DSL/Dial customers
- TCP/IP network configuration and troubleshooting
- Configuration of various networking products from Ascend, Intel, Cisco, for customers
- Configuration of POP3, SMTP, DNS, NAT for customer networks
Education:
MS Computer Science, January 2008
George Washington University, Washington, DC
BS Computer Science with Applied Math, May 1999
Juniata College, Huntingdon, Pennsylvania
Presentations:
- O'Reilly Velocity 2008, Burlingame CA. Actionable Logging for Smoother Operation and Faster Recovery. June 23, 2008. http://www.linuxchick.org/velocity08
- Northern Virginia's Linux Users' Group, Chantilly Virginia. GnuPG. February 2003. http://www.linuxchick.org/gpg
- InterWorks 2001, San Francisco, CA. Using Linux and Open Source Software for Everyday Activities. May 2001.
- HPWorld 2000, Philadelphia, PA. Introduction to the Use and Management of KDE. September, 2000.
- HPWorld 1999, San Francisco, CA. Using Samba. August, 1999.
Professional Memberships:
- Association for Computing Machinery
- IEEE
- USENIX
- SAGE