Alexander Dewolf Email & Phone Number

Linux specialist for Linux Server Administration tasks. Senior

Chicago, Illinois, United States

Chicago, Illinois, United States

✅ Architecting, installing, updating and maintaining multiple Linux servers leveraging Red Hat Enterprise Linux, ensuring seamless integration across development, staging, production, and DR landscapes, while relentlessly pursuing excellence in troubleshooting and Quality Assurance. ✅Managed and optimized RHEL 7, 8, and 9 servers, ensuring stability.

Chicago, Illinois, United States

✅Proactively monitored and addressed system alerts across in-house and client cloud infrastructures, ensuring uninterrupted performance spanning OpenStack and Kubernetes implementations on Ubuntu 18 and 20.✅Led comprehensive Linux-based projects, specializing in OS configurations, UEFI storage management, and establishing a resilient software RAID 1.

United States

Worked on building an hardened Ubuntu 18 and 20 images for embedded systems.

San Diego, California

Systems engineer for Linux based systems and applications.

Greater San Diego Area

Daily Linux maintenance of 3000 servers. 2500 virtual servers (VMware) and 500 bare metals (IBM and HP X86). RHEL 3,4,5,6,7 and SuSE 10,11. EMC SAN and NAS storage. Tivoli ITM, and TSM. BigFix, Puppet and Chef system management tools. Oracle RAC and ASM. Assist development and tier 4 (Engineering) efforts. Bash and Perl scripting. Work done on.

San Diego, California

Daily Linux Administration of dev/UAT/prod environments. CentOS 5 and 6, Ubuntu Linux. Cacti monitoring and AD integration. ESXI VM hosting of Linux dev/testing environments. Amazon Cloud servers and Rackspace hosted services management for production servers.

Home Office (San Diego, CA)

Linux Administrator sub-contractor for IBM supporting Kaiser-Permanente.Daily maintenance of RHEL (5.4,5.5 and 6.0) and SLES VMs (Vcenter) and (IBM Blade X-server and HP blade servers) baremetal servers. Environment:RHELSLESEMC Symmetrix SANOracle RAC ASM storageJDKWSMQ seriestivoli endpoint and backupECC Symmetrix monitoring

Linux and Mac OSX administration duties. RedHat 4 running on cloud based services.

Move of C6 colocation facility; Validation of Network connections and SAN WWNsValidation of shutdown and startup proceduresUpdated Quick Base information for servers moved to QunicyUpdated Avocent KVM with hostnames and hardware typeGathering of Windows Event logs and Linux dmesg logs for HP's re-validation of hardware after moveEnvironment:Sun: OS.

Linux/Unix administration as a contractorResponsibilities: Solaris 10 (SunOS 5.10) installation, maintenance on Sun Ultra 45 hardware Cleaned up missing and incorrect Inventory data in Sharepoint database Hardware moves (Lenovo/Sun/Apple) Decommissioning hardware Linux installation on Lenovo/IBM and Apple hardware, including high availability/performance.

RedHat Linux administration/Perl programmer/MySQL administration; Cleaned up bad data in MySql databaseCorrected non-working SQL generated from Perl scriptsDesigned and implemented project to move Perl scripts to PHPEnvironment: RedHat Linux, MySql, Perl, Bash, PHP

Day to day administration of 2 HP RP3440 UNIX servers running IFAS financial application with EMC CX-300 RAID. HP-UX 11.11, Informix 9.40 HC3, KSH scripting, SQL scripting, EMC PowerPath 5.1.0 and Navisphere.Also administrated Sun 5.0 on a Sun-blade 1500, running Hummingbird hclnfsd, and GIS LMF.

Monitored EDI application and OS logs for proper application execution Shell (KSH and SH) scripting for re-processing EDI data File restores for reprocessing and EST re-submitting QA testing.Assisted with development efforts ("C", KSH or SH scripting) 24/7 support.. Monitored file system usage and assisted with QA/UAT system management.Environment: Compaq.

Maintain and update ICM (Merchandising) system used to manage a large warehouse for order fulfillment/replenishment of warehouse items and printing of product bar codes and retail prices. Ran weekly update script (Sunday nights 1:00PM- 5:00AM) Environment: HP K and N servers, HP-UX 10.20 and 11.00, ICM merchandising system, KSH scripting

The main data center for the company at the time with 100 UNIX servers in our data center.Responsibilities:Maintenance, installation, procurement, specification and configuration of UNIX servers for Provisioning of GSM phones, billing data (CDR, Call Detail Records) collection and printing of monthly cell phone bills.Maintenance of an X.25 network for.

Sys admin for a development team writing middleware software for GTE's land-line based phone usage billing After a security breaking I built a private network of 6 HP workstations and one HP server for the developers to check their code, I also built an NIS environment so that the developers could log into different servers and have a common development.