10 Dexcom operations leaders
Chief operating officer, executive vice president, senior vice president, vice president and senior director titles in global operations, manufacturing and international business operations are held today by these Dexcom operations leaders. A reader can learn how operations leaders work at Dexcom from people who have held the role.
Professionals to explore
Barry Regan
LinkedInExperience: Executive Vice President Global Operations · Dexcom
Barry Regan was Executive Vice President Global Operations at Dexcom from 2020 to 2025, in the general management department, and has been President and CEO Saluda Medical at Saluda Medical since July 2025. Barry Regan was Senior Vice President of Operations at Wright Medical from 2018 to 2020.
Columba McGarvey
LinkedInExperience: SVP Global Manufacturing · Dexcom
Columba McGarvey has been SVP Global Manufacturing at Dexcom since April 2025, a role the profile places in Malaysia, and was Vice President at Dexcom in Ireland from 2020 to 2025. Columba McGarvey was Site Director at AbbVie from 2016 to 2020 and Director, Engineering Services there from 2014 to 2016.
Edel Smith
LinkedInExperience: Head of Operational Excellence - Global Operations · Dexcom Ireland - Athenry
Edel Smith has been Head of Operational Excellence - Global Operations at Dexcom Ireland - Athenry since January 2026 and was Senior Director of U.S Manufacturing at Dexcom from 2024 to 2026. Edel Smith was General manager/Senior Site Director at Dexcom from 2022 to 2024 and Manufacturing Director there from 2021 to 2022.
Ian Topic
LinkedInExperience: Vice President of US Manufacturing · Dexcom
Ian Topic has been Vice President of US Manufacturing at Dexcom since November 2022 and was Sr Director Manufacturing Operations there from 2021 to 2022. Ian Topic was Director of Engineering at Dexcom from 2019 to 2021 and Vice President, Operations at CeloNova BioSciences, Inc. from 2017 to 2018.
Jereme Sylvain
LinkedInExperience: EVP, Chief Operating Officer · Dexcom
Jereme Sylvain has been EVP, Chief Operating Officer at Dexcom since September 2026, in the operations department, and was EVP, Chief Financial Officer there from 2021 to 2026. Jereme Sylvain was SVP, Finance and Chief Accounting Officer at Dexcom from 2020 to 2021 and Vice President, Finance and Corporate Controller there from 2018 to 2020.
Jessica Shields
LinkedInExperience: Vice President - International Business Operations (GBS) & Global Technical Support · Dexcom
Jessica Shields has been Vice President - International Business Operations (GBS) & Global Technical Support at Dexcom since April 2025 and was Vice President - International Business Operations & Global Business Services there from 2020 to 2025. Jessica Shields was Senior Director - International Business Operations at Dexcom from 2018 to 2020, based in Madrid.
Rosita Vasilkeviciute Marcene
LinkedInExperience: Senior Director, Business Operations and Service Excellence EMEA-LATAM · Dexcom
Rosita Vasilkeviciute Marcene has been Senior Director, Business Operations and Service Excellence EMEA-LATAM at Dexcom since April 2025 and was Senior Director, International Business Operations, EMEA there from 2020 to 2025. Rosita Vasilkeviciute Marcene was Senior Vice President, Head of Global Services Lithuania at Danske Bank from 2015 to 2020.
Sayron Ruiz
LinkedInExperience: Vice President Operations · Dexcom
Sayron Ruiz has been Vice President Operations at Dexcom since January 2026, leading a high-volume medical device manufacturing operation in Penang, Malaysia. Sayron Ruiz was Senior Operations Director at Boston Scientific from 2024 to 2026 and Director of Manufacturing Engineering there from 2021 to 2024.
Tammy Brach
LinkedInExperience: Senior Director Operations Program Management · Dexcom
Tammy Brach has been Senior Director Operations Program Management at Dexcom since June 2016, based in San Diego. Tammy Brach was Vice President, Quality at Hologic (Formerly Gen-Probe) from 2013 to 2015 and Vice President, Integration there from 2012 to 2013.
Zeferino (Zef) Cisneros
LinkedInExperience: EVP Global Operations and Quality Officer · Dexcom
Zeferino (Zef) Cisneros has been EVP Global Operations and Quality Officer at Dexcom since January 2026. Zeferino (Zef) Cisneros was SVP Global Manufacturing Edwards Lifesciences at Edwards Lifesciences from 2020 to 2026, GEHC Lean GM at GE HealthCare from 2019 to 2020 and GM Global Supply chain , Clinical Care Solutions there from 2017 to 2019.
Choose the right perspective
Match the person's area, such as a manufacturing site, global manufacturing or international business operations, to the decision you face. Weigh how long each person has held the role you care about, since several of these roles began in 2025 or 2026.
Questions to take into the conversation
- 01What did you change first when you took on your current operations role, and why?
- 02How do you decide which operational problems get fixed first when several compete for the same people?
- 03What has your own work taught you about adding manufacturing capacity quickly without hurting quality?
Reaching Dexcom operations leaders
How can I contact one of these Dexcom operations leaders?
Pick one of the 10 people on this page and choose "Book a paid call", or describe your project to find others. You offer a fee for a 15-minute call or a written answer, Instant Expert finds the person's work email and sends the invitation, and they decide whether to accept. The list covers 2 companies: Dexcom and Dexcom Ireland - Athenry, based on profile data retrieved on October 24, 2026. Being listed here doesn't mean someone has agreed to take calls.
How much does it cost to reach Dexcom operations leaders?
You choose the offer, starting at $5 per person. The offer is what the person receives, and Instant Expert's fee is added on top, so a $100 offer costs you $125. The fee is 20% of what you pay. You're charged only when the person books the call or sends the answer.
What if they don't reply?
You pay nothing. Instant Expert sends follow-up reminders, and if the person hasn't booked or answered within 7 days, the request expires and any hold on your card is released. You can invite several of the 10 people on this list at once and cap your total spend, so you pay only for the ones who accept.
Can an AI agent ask one of these Dexcom operations leaders a question?
Yes. An agent with a USDC wallet on Base can ask one question without an Instant Expert account. It names the person, for example by the LinkedIn URL on this page, and pays per ask over x402 (HTTP 402). The person answers in writing or by voice note, and if nobody answers within 7 days, the payment goes back to the wallet automatically. Claude and ChatGPT can do the same through the Instant Expert connector: setup is at /docs/mcp for Claude and /docs/chatgpt for ChatGPT. x402 docs
About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.
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