Jack Grennan: Email & Phone Number

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Inventory Control Specialist at Costco Wholesale|Seattle, Washington, United States

Position:

Inventory Control Specialist at Costco Wholesale

Location:

Seattle, Washington, United States

View Jack Grennan's Email

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Last updated: 2026-04-20

Updated: 2026-04-20

Found email addresses for Jack Grennan:

Business emails:

g*******j@costco.com

Found phone for Jack Grennan:

+1-***-***-3443

A different Jack Grennan?

Work Experience 6 years

Inventory Control Specialist at Costco Wholesale

Jan 2025 - Current

Cashier at Costco Wholesale

Aug 2024 - Jan 2025

Cashier at Costco Wholesale

Sep 2021 - Aug 2024

Cashier Assistant at Costco Wholesale

Mar 2020 - Sep 2021

Student Employee at University of Washington Libraries

Jan 2023 - Jun 2024

Jack Grennan started working in 2020, then the employee has changed 1 company and 3 jobs. On average, Jack Grennan works for one company for 1 year 6 months.

Their professional focus is Business Operations, Cash Handling, and Cashiering across 3 core areas.

Education

Bachelor of Arts - BA at University of Washington

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