Marek Lesniak Email and Phone Number

✓ Ensuring high quality, availability, and performance of the data platform by identifying improvement points.✓ Organizing work and processes to facilitate maintenance and change with minimal disruption.✓ Building a high-gain and low-cost database maintenance team, while retaining reliability, simplicity, and flexibility.✓ Developing workflows that are effective and transparent in the way they benefit the organization.✓ Driving innovation to reduce technical debt and take advantage of new technologies.

✓ Transformed a reactive DBA team into a proactive service delivery unit, significantly improving service quality and availability to 99.999%.✓ Reduced resource usage by 60% through the redesign of monitoring and maintenance tasks.✓ Implemented a performance testing assessment process to identify and address potential performance issues before software release, ensuring long-term stability and performance.✓ Hardened security aspects and implemented high availability solutions using AlwaysOn, enhancing overall system resilience.

✓ Ensured high availability and proper management of a vast ALM infrastructure ecosystem with over 1600 virtual machines.✓ Played a pivotal role in improving infrastructure quality and availability, leading to successful service outsourcing.

✓ Designed, tested, documented, and performed side-by-side migrations of Team Foundation Server (TFS) 2008, SharePoint, Reporting Services, and SQL Server, ensuring all dependencies remained intact and minimizing downtime from 7 to 3 days.✓ Successfully upgraded TFS 2008 directly to TFS 2012 despite significant technical challenges, notably in the database area, reducing the expected downtime from 7 days to 3 days.✓ Merged TFS 2012 and TFS 2010 infrastructures into a single repository, completing the migration in 36 hours, far exceeding the vendor's estimate of 7 days.✓ Appointed as a consultant for MS SQL Server as part of the ITSM infrastructure delivery, where I designed optimal database platforms and resource sizing.✓ Provided expert guidance to the SQL maintenance team, managed SQL server-related incidents, and designed seamless migration processes for business-critical applications, minimizing downtime and ensuring continuity.

✓ Implemented the IBM Global Delivery Framework (GDF) for system administrator teams, improving performance and KPIs through lean six sigma processes.✓ Earned exemplary audit assessments for the successful implementation of incident management workflows, SLO and SLA management, and service portfolio development.

✓ Developed bespoke software solutions for small and medium enterprises in both private and public sectors of the Polish market.✓ Notable projects include label printing software for a waffle factory, exam and graduation management software for an artisans guild, and an online grocery wholesaler store.