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Physical Measurement Laboratory

Office of Weights and Measures

NIST Associates for OWM

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Click on the photos below to view the biography webpage.

NIST Associates

Yvonne Branden, Laboratory Metrology Program

Tina Butcher, Training Specialist, OWM HQ

Lisa Corn OWM Associate — Lisa Corn, Metrology Instructor, Laboratory Metrology Program

Chuck Ehrlich, Program Leader, International Legal Metrology — Chuck Ehrlich, Physicist, OWM HQ

Female employee silhouette wearing suit — Joanne Krumel, Educational STEM Outreach Coordinator, Metric (SI) Program

Ombati Wilson Nyang’au, Electrical Engineer, Laboratory Metrology and International Legal Metrology Programs

Ralph Richter — Ralph Richter, Engineer, International Legal Metrology Program

Mark Ruefenacht Head Shot — Mark Ruefenacht, Metrology Instructor, Laboratory Metrology Program

Staff photo of Scott Simmons — Scott Simmons, Training Specialist, OWM HQ

Kate Smetana, Metrology Instructor, Laboratory Metrology Program

Jose Torres-Ferrer, OWM Metrology Instructor — Jose Torres-Ferrer, Metrology Instructor, Laboratory Metrology Program

Photo of Yoon Thwel — Thwel Yoon, 2025 Montgomery College PREP Intern, Metric (SI) Program

Previous NIST Associates and Student Interns

Maryanne Amanze, Metric (SI) Spring 2024 Montgomery College Intern — Maryanne Amanze, 2024 Montgomery College PREP Intern, Metric (SI) Program

Photo of OWM Intern Lloyd Bekele — Lloyd Bekele, 2023 Montgomery College PREP Intern, Metric (SI) Program

María Peñahora Cañeque Simón — María Peñahora Cañeque Simón, International Legal Metrology Program

Photo of Cyra Golwalla — Cyra Golwalla, Administrative Assistant and Salesforce Expert

nelka Jagoda, Metric (SI) Spring 2024 Montgomery College Intern — Dinelka Jagoda, 2023 and 2024 SURF Fellow, Metric (SI) Program

Photo of OWM Intern Arghavan (Angie) Tehrani — Arghavan (Angie) Tehrani, 2023 Montgomery College PREP Intern, Metric (SI)

Ben Tran OWM 2023 SURF Student — Benjamin Tran, 2023 SURF Fellow, Metric (SI) Program

Wendy Rocio Calle Villarroel — Wendy Rocio Calle Villarroel, Metrologist, National Legal Metrology Program

Travis "TJ" White, 2022 and 2023 SURF Fellow, Metric (SI) and Laboratory Metrology Programs

Metrology, Metric and Weights and measures

Contacts

General Information - OWM

[email protected]

Created March 30, 2022, Updated September 26, 2025

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