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Linux system administrator

Newport Beach, CA, 92660
February 20, 2020

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Charles L. Schaaf

***** ****** **. 949-***-****

Newport Beach, CA 92660

Summary Senior Linux system administrator with 13 years of success and expertise managing high-availability infrastructure for an Oracle-centric private cloud provider.







RedHat Enterprise Linux, Oracle Enterprise Linux, Debian Switch, Router configuration

10g database, E-Business Suite 11i, R12

Microsoft Windows, Microsoft Office, Symantec Messaging Gateway Professional


TrustCommerce Santa Ana, CA 11/2018 - Current

Systems Administrator

Support PCI compliant applications and production servers.

Provide bi-weekly 24/7 on-call support in a Debian/Postgres environment.

Deploy application packages per Change Control procedures.

Tune Nagios monitoring scripts to reduce unnecessary Icinga alerts.

Perform disk space management as needed.

Create internal Wiki articles for knowledge base. Mercury Technology Group, Inc. Irvine, CA 10/2004 - 5/2018 Senior System Engineer

Managed 1,500+ Linux and 100+ Windows servers in 2 ATT data centers.

Installed Linux and configured servers using Oracle VM (Oracle’s version of VMWare).

Developed provisioning and decommissioning procedures.

Provisioned servers, installed packages.

Maintained DNS and Active Directory (on Windows Domain Controllers).

Configured filesystems (ext2/3/4, LVM, NFS, autofs, SMB, and CIFS).

Created/managed users, groups, printers, directories, files, ownership, and permissions for Linux and Windows servers.

Configured sendmail and Postfix on mail servers.

Researched and troubleshot technical issues and proposed solutions.

Developed procedures, checklists, and documentation for SAE16 audit.

Customized and deployed proprietary monitoring software.

Developed procedures and checklists for building servers, configuring monitoring components, and decommissioning servers.

Supported Data Center move.

Installed cabling in racks at new Data Center.

Planned and coordinated physical server moves.


EmpowerTrain Corp. Irvine, CA 11/2009 - 8/2011

Instructor – Red Hat Linux (RHEL 5, 6)

Taught Red Hat Linux Fundamentals, System Administration, and Networking Services to UCI Extension students using curriculum developed by Guru Labs. Each 5-week class included lecture and extensive hands-on lab exercises designed to prepare the students for RHCSA and/or RHCE certification. Celerity Solutions (formerly Somerset Automation), Santa Ana, CA 1993-2002 Oracle Database Administrator

Installed Oracle 7.3.4 and 8i on Windows and Linux platforms.

Created database instances as needed for custom application.

Migrated production application from Oracle 7.3.4 to 8i.

Developed installation scripts and procedures that would: Install the necessary Oracle components; create the database instance, tables, and indexes; install and compile triggers, views, and packages; create users and roles.

System/Network Administrator

Managed a multi-server network of Windows 2000 and NT 4.0 servers.

Provided hardware, software, and user support.

Scheduled daily and weekly backups using ArcServe, including off-site storage of backup tapes.

Planned and executed the move of all computer equipment during office relocation.

Software Developer

Developed financial and warehousing applications using ACUCOBOL. Development and testing was performed in a DOS environment. The production system ran on UNIX. Companies using this system included Alberto Culver, Becton Dickinson, CSI Donner, Galoob Toys, Jergens, Kimberly-Clark, and Microsoft.

Developed reports using Crystal Reports.

Developed Client-Server warehousing RF applications for Unix servers and Telxon handheld barcode scanners. The server application was written in ACUCOBOL and the client application was written in TCAL. The applications included product Receiving, Putaway, Picking, Replenishment, Shipping, and Inventory Audit.



Missouri Western State College, St. Joseph, MO

B.S. Computer Science (Accounting Minor)

University of California, Irvine University Extension Oracle Database Administration Certificate

Oracle Corporation

OCP (Oracle Database 10g Administrator Certified Professional) Cisco Systems, Inc.

CCNA (Cisco Certified Network Associate) - 2010

Amazon Web Services

Amazon Cloud Practitioner - April 2018

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