If you work with usage stats, you already know Tasha Mellins-Cohen. As Executive Director of COUNTER Metrics, she’s one of the leading voices shaping how our community measures and interprets usage. Tasha has authored friendly guides, shepherded countless implementations, and seems to give three excellent talks before breakfast. She brings equal parts clarity and pragmatism to thorny metrics questions—exactly what we all need for the R5 → R5.1 shift. We’re very grateful she’s joining us to share what’s new and how to keep everyone’s trendlines sane.
Simona Popelkova
Product Manager & Marketing Witch
If you’ve ever emailed CELUS for help, there’s a good chance Simona replied. She calls herself a Product Manager, but for the past three years she’s mostly been on the front lines with librarians, turning pesky problems into tidy solutions. She’s rolled out more R5.1 SUSHI credentials than she cares to count and has seen it all — the good, the bad, and the gloriously weird. In this webinar, Simona will share practical tricks for troubleshooting credentials, decoding error payloads, and unravelling the gremlins that keep your harvesting reports from being truly useful.
Kamila Kosatova
Heart of Customer Support
Meet Kamila — the heart of Customer Support at CELUS. She’s only been with us a few months, yet she’s already solved hundreds of R5.1 SUSHI cases — from missing history and odd date windows to cryptic error payloads. Kamila lives where harvesting meets reality: reproducing issues, comparing specs vs. behavior, and feeding clear, actionable fixes back to both librarians and platforms. In this webinar, Kamila will walk through the most common pitfalls we see in the wild — and the fastest, least-painful ways out.
Beda Kosata
Lead Developer of CELUS
Meet Beda Košata, the brain behind CELUS. As our lead developer, he has a rare superpower: translating real-world librarian needs into clean, reliable features (sometimes while winning at table tennis). Beda is also a member of the COUNTER Metrics Code team and the developer of the COUNTER Validation Tool, which means he doesn’t just implement standards — he helps shape them. For this webinar, he’ll focus on the practical side of the R5 → R5.1 transition: how to keep your trends intact, your dashboards comparable, and your sanity preserved.
