Bartosz Gradys

Network automation and engineering lead with progressive experience spanning global incident response, multi-vendor change implementation, software assurance, security compliance and technical leadership. Combines hands-on expertise across Cisco, Arista, Juniper, F5 and Citrix environments with Python-based automation using Nornir, Netmiko, various APIs and SQL. Experienced in turning high-effort operational processes into fast, repeatable workflows across a global network of more than 30,000 devices.

Network Software Assurance Team Lead at Citibank (2020-01 – Present)

• Provide technical leadership for a four-person team of platform specialists while retaining ownership of the growing Arista estate (over 10,000 devices) and coordinating software-assurance priorities.
• Automated weekend change, daily change-schedule, weekly compliance and audit reporting with Python, reducing recurring tasks from 4–5 hours to approximately one minute.
• Build operational automations using Nornir, various APIs, Netmiko, with results persisted in Microsoft SQL Server for reporting and downstream use.
• Developed SSH- and Telnet-based automation to discover devices connected to terminal servers, replacing a nearly year-long, globally coordinated inventory effort with a process producing results within 2 hours.
• Created automated pre- and post-change validation for multi-vendor device migrations, including Cisco Nexus-to-Arista replacements, enabling immediate service and peering comparison and faster detection of post-implementation issues.
• Deliver purpose-built automation for network teams using GitHub for daily source control, CI/CD and GitHub Actions, supported by modern AI-assisted development tools.

Network Software Assurance Technician at Citibank (2019-01 – 2019-12)

• Owned upgrade planning for Arista and a major Cisco Nexus platform covering more than 10,000 devices, including operating-system, ROMMON, EPLD, CPLD, SMU and SWIX releases.
• Assessed redundancy, MLAG/vPC topology, technical risk and business scheduling constraints to prepare safe, coordinated upgrade plans.
• Supported vulnerability, end-of-vendor-support and end-of-life remediation; reviewed platform policies, remediated security-compliance violations and contributed to audited SPOF assessments.
• Defined and validated the software-upgrade procedure for Cisco SD-WAN controllers and edge devices before transitioning the established process to another team member.

Network Level 1 Manager at Citibank (2016-07 – 2018-12)

• Served as technical shift manager for a follow-the-sun operations team comprising approximately a dozen engineers in Poland and several colleagues in India; maintained oversight of priority incidents and reported to the incoming US team.
• Led complex troubleshooting and major-incident response, implemented network changes when required and mentored less-experienced engineers.

Network Change Implementation Engineer at Citibank (2015-06 – 2016-06)

• Selected for a newly established change-delivery team after authoring one-to-one hardware-replacement plans; safely implemented configuration changes across Cisco IOS, IOS XE, IOS XR and Nexus, as well as Arista, Juniper, F5 and Citrix platforms.

Network Level 1 Engineer at Citibank (2014-10 – 2015-05)

• Provided first-line monitoring, troubleshooting and incident coordination from Citi's global Command Center, including major incidents and infrastructure attack remediation.
• Coordinated local IT teams, service providers and hardware vendors for physical checks, escalations and RMA activity; performed hardware changes and authored replacement plans ranging from components to complete devices.

Senior Corporate IT Specialist at Lionbridge Poland (2014-03 – 2014-10)

• Delivered second-line support for advanced hardware, software and access-management issues and maintained the team's internal knowledge base.
• Acted as remote local IT administrator for the Espoo, Finland and Madrid, Spain offices, which had no dedicated on-site administrators.

Corporate IT Specialist at Lionbridge Poland (2013-04 – 2014-02)

• Provided first-line IT helpdesk support for employee hardware and software issues and administered accounts, groups and access permissions across internal applications, Active Directory and Microsoft Exchange.

Bachelor of Engineering in Engineering – College of Applied Computer Science in Warsaw (2019)