Denis Hierholzer
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Resume

Senior Systems Administrator / Systems Engineer
MCSA, CEH, CCNA-Security, 10+ years work experience

Table of Content

Quick Intro

Senior Systems Administrator/Engineer with multiple major IT certifications (e.g. MCSA: Windows Server 2008 , CEH and CCNA-Security) and more than 10 years work experience. Specialized in Windows servers (2003-2012 R2), Active Directory, backup, virtualization, monitoring and deployment. Also interested in Linux, networking, security, software development and scripting. Excellent documentation skills.

Since 2007 I have worked as a Systems Administrator/Engineer, focusing on several topics like Windows servers, Active Directory, backup, virtualization, patch management and monitoring. Beside that I am also working with Linux servers, develop small applications or plugins (Java, C#, Python) and love automating tasks with scripting (Batch, VBS, Powershell, Linux Shell). I'm also experienced in writing detailed technical documentations for administrators and end users. Further education is very important to me that's why I regularly work on certifications and attend IT courses. Furthermore I am proactive, very punctual and highly organized. In my spare time I enjoy extending my own IT infrastructure and explore upcoming applications and services.

Check out my self-developed application PicR (Picture Randomizer) >>

Explore my IT lab >>

Work Experience - After Graduation

Infrastructure Analyst / Systems Engineer
Schroder & Co Bank AG
Zurich City, Switzerland
June 2014 – now
Employed at the IT Operations department with following responsibilities:

  • Administration and installation of Windows, Solaris, network and security systems
  • Operating of T24 (banking app)
  • VMware infrastructure, vFailover
  • System Center infrastructure (SCCM, SCOM)
  • Security systems implementation & administration (AD RMS, Palo Alto firewall, privileged access management)
  • Process automation (PowerShell)

See accomplishments and projects at Schroder & Co Bank AG

Senior Systems Administrator / Systems Engineer
Dentsu Holdings USA / 360i – since Jan 2014
New York City, USA
December 2012 – March 2014 (1 year 4 months)
Reference Letter EN
Employed at the corporate IT department managing about 10 branches and more than 300 servers worldwide in a mixed Windows/Linux environment.
Administration and engineering of Windows and Linux servers, VMware vSphere, SCCM, Active Directory, WSUS, McAfee ePO (anti-virus), Redmine, Atlassian JIRA and Confluence, EMC NetWorker, MS Exchange, MS SQL Server (incl. clustering and SQL queries) and Apache Subversion (incl. replication). Developed several PowerShell and VBS apps.

See accomplishments and projects at Dentsu Holdings USA

IT Officer
Bomatec AG
Hoeri, Zurich, Switzerland
January 2011 – October 2012 (1 year 10 months)
Reference Letter EN | Reference Letter DE
Recruited to manage all IT related tasks including project management. Scope of position was versatile and included management of:

  • Network Services
  • Windows 7 Desktop Systems
  • Help Desk Operations
  • Newsletter Operations
  • Windows 2008 R2 Servers
  • Exchange 2010 Servers
  • SQL Server
  • Lync 2010 System
  • SAN System
  • Backup System
  • ERP System

See accomplishments and projects at Bomatec AG

Systems Administrator / Systems Engineer
Bucher Hydraulics
Klettgau, Germany
September 2007 – December 2010 (3 years 4 months)
Reference Letter DE
Employed at the central IT department managing 16 branches and about 100 servers worldwide. Administrated the whole Lotus Notes / Domino infrastructure including migration from version 7 to 8. Developed and improved various Notes applications.

See accomplishments and projects at Bucher Hydraulics

Work Experience - Before Graduation

Web Developer (Diplomate)
eschbach IT GmbH
Bad Saeckingen, Germany
March 2007 – August 2007 (6 months)
Diploma Thesis (technologies: PHP, AJAX), Web Development

See accomplishments and projects at eschbach IT GmbH

Systems Administrator (Student Apprentice)
Micronas GmbH
Freiburg, Germany
March 2006 – August 2006 (6 months)
Network Administration, Second Level Support, Server Administration, Scripting

Systems Administrator and First-Level Supporter (Student Apprentice)
HARMAN/BECKER Automotive Systems GmbH
Stuttgart Area, Germany
September 2004 – February 2005 (6 months)
Network Administration, First Level Support, Application Development

Database Developer (Freelance)
Textilbuero Weissenberger GmbH
Klettgau, Germany
August 2002 – September 2002 (2 months)
Database Development (MS Access) for Order Processing

Volunteer Experience

Volunteer Systems & Web Administrator
Gemeindebuecherei Klettgau – Public Library
Klettgau, Germany
January 2002 – Present
User Support, System Administration, Website Development and Administration

Certificate about volunteering work

2017-01-15 Report about the official appreciation

See accomplishments and projects at Gemeindebuecherei Klettgau

Education

Diplom-Informatiker (FH) – BSc-equivalent
Hochschule Furtwangen University
Field of Study: Computer Networking
Grade: 1,8 (equivalent to A-)
2003 – 2007 (4 years)

List of all attended study subjects >>

Abitur – German High School (-Level) Diploma
Gewerbliche Schulen Waldshut – Informationstechnisches Gymnasium
Heavy focus on IT
Grade: 1,9 (equivalent to A-)
2000 – 2003 (3 years)

Certifications

Check Point Certified Administrator (CCSA) – R80
Certificate (pending)
August 2018

Palo Alto Networks ACE (Accredited Configuration Engineer) – PAN-OS 7.0
Certificate
February 2017

Cisco Certified Network Associate – Security (CCNA-Security)
Certificate / NSA INFOSEC – 4011 Recognition
Exam IINS (210-260)
November 2016 (valid until November 2019)

EC-Council – Certified Ethical Hacker (CEH)
Certificate
Exam 312-50 (v9)
April 2016 (valid until April 2019)

Oracle Certified Associate, Oracle Solaris 11 System Administrator
Certificate
Exam 1Z0-821
November 2015

Intensivkurs Bankfach Basis (finance business fundamentals)
Fachschule fuer Bankwirtschaft
Certificate
September 2014 – January 2015

Cisco Certified Network Associate – Routing and Switching (CCNA R/S)
Certificate
Exam ICND2 v2.0 (200-101)
December 2013 (valid until November 2019)

Cisco Certified Entry Networking Technician (CCENT)
Certificate
Exam ICND1 v2.0 (100-101)
November 2013 (valid until November 2019)

VMware Certified Associate – Data Center Virtualization (VCA-DCV)
Certificate
Exam VCAD510
November 2013

Microsoft Certified Solutions Associate – Windows Server 2008 (MCSA)
Certificate
May 2012

Microsoft Certified IT Professional – Server Administrator (MCITP:SA)
Certificate
May 2012

IBM Certified System Administrator – Lotus Notes and Domino 8.5
Certificate
August 2010

Cambridge Certificate in Advanced English (C1 Level)
University of Cambridge, License 0026114096
Certificate
December 2009

IBM Certified System Administrator – Lotus Notes and Domino 8.0
Certificate
October 2009

IHK Certified Data Protection Officer (dt.: Datenschutzbeauftragter)
Certificate
September 2008

Independent Coursework

Check Point Cyber Security Administrator R80.10 (CCSA-CP R80.10)
Certificate of Completion
May 2018

Tanium 7 Foundation, Operations, & IR Deep Dive
Certificate of Completion
Course Description
November 2017

Palo Alto Networks – Firewall: Install, Configure, and Manage (EDU-201)
Certificate of Completion
February 2017

PowerShell for the IT Administrator – Part 2 (Microsoft WorkshopPLUS)
Certificate of Attendance
January 2014

PowerShell for the IT Administrator – Part 1 (Microsoft WorkshopPLUS)
Certificate of Attendance
July 2013

Microsoft SQL Server 2008 Administration Course (VTC)
Course Details
March 2013

Planning, Deploying and Managing Microsoft SCCM 2007 (MOC 6451)
Certificate of Attendance
June 2011

Two-Day-Course “OpaccOne for System Administrators” (ERP-System)
Certificate of Attendance
May 2011

One-Day-Course MS Office 2010
Certificate of Attendance
April 2011

Languages

English – Full professional proficiency

German – Native speaker

Swiss German – Native speaker

French – Basic knowledge

Personal Commitment

Organizer of the New York City German Culture Meetup Group
2013 – 2014

Student President at the IT Faculty
Hochschule Furtwangen University
2005 – 2006

Preferred Work Location

My preferred work location is within a radius of about 50 km of 79771 Klettgau, Germany. Please see the map below to get a better idea of this area.

Preferred Work Location

Preferred Work Location