david horn

senior systems administrator

About

I am a respected Senior Systems Administrator with 20 years of IT success. I am a real-world problem-solver who delivers solid system performance while keeping costs in check. I am a highly technical, hands-on expert who possesses an broad understanding of the entire infrastructure environment. I am recognized as an expert troubleshooter who is able to get to the root cause of complex technical issues. I use my strong interpersonal and communication skills to work effectively with colleagues, senior staff, delivery partners and customers. I am self-motivated and extremely adaptable to changing work environments. My expertise includes: VMware Virtualization Cloud Management and Migration (Azure, AWS) HP and EMC Storage including SAN infrastructure Microsoft Server Products (2012R2, 2012, 2008, 2008R2, 2003) Microsoft Active Directory Enterprise Backup Solutions Data Center design, build out and operations Active Directory MS Exchange Disaster Recovery

Country

united states

City

houston

Industry

oil & energy

Skill

active directory, servers, vmware, microsoft exchange, virtualization, citrix, disaster recovery, emc storage, citrix xenapp, vmware esx, vmware infrastructure, enterprise storage, data center, hp 3par, storage virtualization, storage architecture, storage solutions, backup solutions, network backup, microsoft server technologies, redundancy management, backup exec, system administration, windows server, troubleshooting, enterprise systems implementation

Experience

senior systems administrator

mitsubishi caterpillar forklift america inc. (mcfa)

2019-3 - Present · 7 yrs 7 mos

Managing most infrastructure systems including virtualization, Active Directory, Exchange, storage, backups, pretty much anything except networks.

infrastructure architect

par pacific holdings, inc.

2017-11 - 2018-3 · 5 mos

* Design, Manage and maintain all aspects of IT Infrastructure excluding networking. * Design/Implement CommVault backup solution replacing numerous other backup platforms. * Redesigning VMware environment consolidating numerous older versions 4.x, 5.x and 6.x to the current version. * Redesigned Nimble storage greatly reducing current footprint. * Manage Exchange environment which includes on premise and Office 365 in the Azure Cloud. * Manage Active Directory which is also on premise as well as in the Azure Cloud. * Assisted in setting up Microsoft Multifactor Authentication (MFA) used for multiple purposes. * Manage and maintain Citrix XenDesktop environment.

senior system engineer

ignite restaurant group

2016-1 - 2017-9 · 1 yr 9 mos

Create the architecture for and maintain the server and storage systems within the restaurant support center and for all restaurant locations. Manage the reliable and scalable operation of the systemic infrastructure of the company.

senior system administrator

alta mesa services

2018-3 - 2019-2 · 1 yr

Design, manage and maintain all aspects of IT Infrastructure excluding networking Replaced existing VMware environment with new hardware (storage and computer) with current version of VMware Redesigned Nimble storage greatly reducing current footprint Manage Active Directory on premise as well as Azure AD Cloud Manage Office 365 environment Implemented life cycle management of users and computer accounts within AD where there had been no process Designed and implemented Citrix VDI solution to replace Geologist graphic-intense and expensive workstations producing a significant cost savings Redesigned Veeam backup environment reducing backup window from 24 hrs to 4 hrs Migrated from on premise ADFS to Azure AD SSO Designed and implemented server and desktop patching solution bringing automation to a previously manual process

active directory administrator

schlumberger

2011-1 - 2014-1 · 3 yrs 1 mo

Maintained all aspects of Schlumberger’s Active Directory infrastructure, including a complete overhaul and redesign of Site and Services to greatly improve system performance. Put in place processes to prevent Sites and Services from falling back into its previous state of disarray. Spearheaded a project to improve the efficiency of Windows based DHCP servers that included a review of all servers followed by making all required settings changes. Created numerous scripts to help maintain and clean up objects with AD. There had been no prior efforts and subsequently hundreds of thousands of old objects were removed.

virtual infrastructure architect and administrator

schlumberger

2014-8 - 2015-9 · 1 yr 2 mos

Designed, implemented, maintained Schlumberger’s Virtual Infrastructure for their SAP project, including VMware virtualization design, storage design, backup design and network design. Designed and implemented a Citrix XenDesktop VDI solution within the virtual environment. Designed and maintained the patching environment for everything contained within the SAP project as it related to infrastructure. Set up three different Data Centers for this project, one in Houston and two in Amsterdam, The Netherlands.