Tomasz Doniec
Splunk Engineer
Kraków
Summary
An adaptable and reliable IT professional with over 8 years of experience in technical support, IT infrastructure monitoring, and cybersecurity. Specialized in Splunk products, with proven expertise in onboarding complex data sources, building dashboards, and developing monitoring solutions using Splunk ITSI.
Overview
13
13
years of professional experience
11
11
Certifications
Work History
Splunk Engineer
Minas Sp. z o.o.
09.2021 - 02.2025
- Administer Splunk environments, ensuring stability, scalability, and high availability.
- Manage and deliver implementation projects for enterprise customers.
- Design and deploy custom Splunk applications and add-ons to extend platform functionality.
- Provide consultancy on writing efficient and scalable SPL queries.
- Advise customers on architecture and best practices for data onboarding.
- Participate in planning sessions and contribute to the roadmap of new Splunk features.
- Deliver technical workshops and training sessions for customer teams.
Splunk Engineer – Cyber Security Team
ASSA ABLOY Opening Solutions Poland S.A.
09.2021 - 02.2025
- Integrate diverse data sources (Windows, Linux, network devices, cloud platforms, applications) into Splunk for monitoring and security use cases.
- Develop dashboards, alerts, and correlation searches to support SOC operations and incident response.
- Build and maintain ITSI (IT Service Intelligence) services and KPIs for real-time monitoring of critical infrastructure.
- Automate deployment and configuration processes using Ansible.
- Collaborate with Threat Intelligence and Detect & Respond teams to improve detection and forensic analysis.
- Optimize indexing strategies, reduce license usage, and improve search performance.
- Act as subject matter expert (SME) for Splunk within GSSC Cyber Security, supporting stakeholders in Europe, the US, and Asia.
Security Operations Engineer – Cyber Security Team
ASSA ABLOY Opening Solutions Poland S.A.
09.2021 - 09.2022
- Administered security tools and supported daily SOC operations.
Associate Technical Support Engineer (T3) – Customer Support Team
Splunk Services Poland Sp. z o.o.
04.2020 - 08.2021
- Provided advanced (third line) support for Splunk Enterprise and Splunk Cloud customers worldwide.
- Troubleshot performance issues, investigated internal Splunk logs, and recommended configuration changes.
- Collaborated with Splunk Cloud Operations and development teams to resolve escalations and identify product defects (JIRA).
- Delivered high-quality technical solutions under strict SLAs.
Application Analyst – Customer Support
Relativity Poland Sp. z o.o.
10.2019 - 03.2020
- Supported customers via phone and email, tracking incidents in Salesforce.
- Diagnosed application and infrastructure issues (Windows Server, SQL).
- Escalated and coordinated fixes with engineering teams.
Operations First Line Coordinator / Technical Support Engineer
Skelia Poland Sp. z o.o.
06.2017 - 10.2019
- Coordinated IT support team tasks, monitored ticket queues, and ensured SLA compliance.
- Performed first-line monitoring and troubleshooting (Windows Server, Active Directory, VMware/Hyper-V, Veeam & CommVault).
- Escalated incidents to higher-level support groups and maintained documentation.
Production Operator
Waterford Kitchens Ltd
05.2015 - 04.2017
Junior Waste Management Specialist
Veolia Environmental Services
07.2012 - 11.2014
- Coordinated waste management processes during shale gas exploration.
- Managed logistics and supervised truck drivers and machine operators.
Education
Master of Science, Engineer - Geology, Geophysics and Environmental Protection
AGH University of Science And Technology
Kraków01.2011
Skills
- Splunk Enterprise & Splunk Cloud – administration, monitoring, optimization
- SPL (Search Processing Language) – query writing and optimization
- IT Infrastructure – Linux and Windows Server administration
- Cloud Computing – Microsoft Azure, Amazon Web Services (AWS)
- Automation & Scripting – Bash, Ansible, Python
- Databases – T-SQL
- Web Technologies – HTML
- Business Tools – Microsoft Office
- ITSM & Ticketing Systems – Salesforce, ServiceNow, Jira
Certification
Splunk Core Certified User
DATA CONSENT
Wyrażam zgodę na przetwarzanie moich danych osobowych zawartych w ofercie pracy dla potrzeb niezbędnych do realizacji procesu rekrutacji zgodnie z ustawą z dnia 10 maja 2018 roku ochronie danych osobowych (Dz. Ustaw z 2018, poz. 1000) oraz zgodnie z Rozporządzeniem Parlamentu Europejskiego i Rady (UE) 2016/679 z dnia 27 kwietnia 2016 r. (RODO).
Timeline
Splunk Engineer
Minas Sp. z o.o.
09.2021 - 02.2025
Splunk Engineer – Cyber Security Team
ASSA ABLOY Opening Solutions Poland S.A.
09.2021 - 02.2025
Security Operations Engineer – Cyber Security Team
ASSA ABLOY Opening Solutions Poland S.A.
09.2021 - 09.2022
Associate Technical Support Engineer (T3) – Customer Support Team
Splunk Services Poland Sp. z o.o.
04.2020 - 08.2021
Application Analyst – Customer Support
Relativity Poland Sp. z o.o.
10.2019 - 03.2020
Operations First Line Coordinator / Technical Support Engineer
Skelia Poland Sp. z o.o.
06.2017 - 10.2019
Production Operator
Waterford Kitchens Ltd
05.2015 - 04.2017
Junior Waste Management Specialist
Veolia Environmental Services
07.2012 - 11.2014
Master of Science, Engineer - Geology, Geophysics and Environmental Protection
AGH University of Science And Technology