Deutsch
English
EspañolService profile↗
Service overview
Capabilities, areas of work and technical focus at a glance.
Qualifications & technical evidence
IT certifications with a traceable link to practical experience.
More than 65 documented IT and technology certifications complement over 15 years of practical experience in software, infrastructure, security and digital systems.
65+certifications
15+years of experience
PracticeConsulting & delivery
Documented expertise
Microsoft
Infrastructure
IT Security
Software
Areas of expertise, career history and documented qualifications – in one place.
PROFILE & CREDENTIALS
Service overview & CVs.
Explore my professional background with a concise service overview and two CV versions to choose from. Find the right documents for your project assessment or candidate presentation.
Version 1PDF
CV · Version 1
My existing CV version covering my professional background and qualifications.
Version 2PDF
CV · Version 2
Revised CV in the Signature layout, covering career history, expertise and original certificates in the appendix.
Original documents open in a new tab. Choose the version best suited to your enquiry.
Qualifications create value when they can be applied.
Certified knowledge – applied in real IT projects.
The certificates document technical foundations and specialisations across different technology phases. What matters to me is not the number alone, but the combination of sound knowledge, long-term practical application and clear consulting.
Extended evidence section
Broadly documented, directly accessible and professionally presented.
In addition to the existing image gallery, the most relevant information from teissl.info is now consolidated here: vendor categories, direct PDF downloads, external verification paths and structured evidence access. This creates a more complete and significantly more trustworthy impression for decision-makers, recruiters and technical stakeholders.
Direct PDF evidence
Selected certifications can be opened and reviewed immediately as PDFs.
External verification
Credly, vendor registries and transcript or access codes complement the documentation.
Wide technology coverage
Software, infrastructure, Linux, databases, virtualization, security, networking and web.
Technology breadth
Vendor and competency areas at a glance
The certifications span multiple technology domains. This demonstrates not only breadth of knowledge, but also the ability to work across the interfaces between software, infrastructure, security and operations.
Microsoft & platforms
Coverage from databases and web development to Office 365, server infrastructure and Azure/web services.
Web, software & development
Magento, Adobe, Android and FileMaker demonstrate front-end, application and development expertise.
Linux, systems & identity
LPIC, SUSE, Novell and NetIQ confirm knowledge in Linux operations, administration and identity management.
Networking & security
Cisco, Juniper and Axis extend the portfolio with networking, video and security-related vendor expertise.
Virtualization & cloud
VMware, Citrix and Oracle document experience in virtualization, cloud-oriented systems and platform operations.
Enterprise & business solutions
IBM and Apple evidence rounds out the profile for business environments, SaaS and productive enterprise systems.
Direct access
Selected PDF downloads
Below is a curated selection of important certificate downloads. Additional PDF attachments, visual evidence and manufacturer-specific verifications remain available on teissl.info.
Microsoft Certified Professional
Foundational vendor credential with direct PDF certificate.
MCSE: Data Platform
Documented evidence in data platform and SQL-oriented solutions.
Microsoft Certified IT Professional: Office 365
Relevant evidence for productive Microsoft and Office environments.
Magento Certified Developer
Evidence of e-commerce-oriented development and system knowledge.
Magento Certified Developer Plus
Advanced Magento evidence with deeper implementation expertise.
Magento Certified Front End Developer
Front-end focus for layouts, themes and user-facing e-commerce delivery.
LPIC-1 Linux Professional Institute
Strong foundational and administrative evidence for Linux environments.
VMware Certified Associate 6 – Network Virtualization
Virtualization evidence with a focus on networks and modern environments.
Oracle Database 12c: SQL Fundamentals
SQL and database fundamentals with direct PDF evidence.
Adobe Certified Expert – ColdFusion 9
Application-oriented Adobe evidence in web and application development.
SUSE Linux Enterprise Server 11
System-oriented Linux evidence for enterprise administration.
Certified NetIQ Identity Manager Administrator
Identity and access management backed by official PDF evidence.
Apple Certified Support Professional 10.10
Support and integration competence in the Apple ecosystem.
JNCIA-E – Juniper Certified Associate
Networking-related vendor certification with a verification code.
Citrix Certified Administrator for Citrix XenApp 6
Practical evidence for Citrix administration and application delivery.
IBM Certified Associate SmartCloud Control Desk V7.5
Enterprise evidence for IBM cloud and service-management related topics.
Axis Certified Professional (German certificate)
Additional evidence in the video and security domain.
Further certificates, additional attachments and the complete overview of evidence are available on the original source page.
Open the full certifications pageVerification center
Trace authenticity via vendors, registries and codes.
In addition to individual PDF certificates, several independent verification paths are available. Depending on the vendor, the documentation can be checked directly or with the provided transcript or access data.
Credly profile
Digitally verified badges as an additional authenticity layer.
Open verificationMicrosoft transcript
Vendor-side overview of several Microsoft certifications.
Code / access
Transcript-ID: 1098353 · Access-Code: mcpteissl
Open verification
Linux Professional Institute
LPIC-1 with a separate verification code.
Code / access
LPI-ID: LPI000352132 · Code: m9xu42c3w7
Open verification
Apple registry
Entry in the Apple Certified Professionals Registry.
Code / access
Authorization Code: APPL21521
Open verification
Juniper verification
Juniper certification with a documented verification code.
Code / access
CertManager ID / Verify Code: E80FLKWSW1Q45CXM
Open verification
Complete source page
All further attachments, vendor sections and visual evidence in one place.
Open verificationNote: some vendors require additional sign-in data or provide detailed codes only on request. The main overview on teissl.info consolidates these references in one place.
Documented qualifications
Selected certification evidence
Click a certificate to view it larger. Additional evidence is loaded as needed so the page remains fast and easy to navigate.
External verification
Verification through Credly and additional evidence.
Some certifications are additionally documented through Credly as digital badges. Issuer, qualification and badge information can be verified directly there.
From qualification to solution
Looking for technical expertise with a business perspective?
In a no-obligation introductory call, we can assess your starting point and determine which technical or organisational steps make sense.