William Stopczynski
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William Stopczynski Email & Phone Number

Senior Manufacturing Quality Supervisor at Mainspring Energy
Location: Pacifica, California, United States 6 work roles 1 school
1 work email found @flyzipline.com LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 86%

Contact Signals · 1 work email

Work email w****@flyzipline.com
LinkedIn Profile matched
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Current company
Mainspring Energy
Role
Senior Manufacturing Quality Supervisor
Location
Pacifica, California, United States
Company size
511 employees

Who is William Stopczynski? Overview

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Quick answer

William Stopczynski is listed as Senior Manufacturing Quality Supervisor at Mainspring Energy, a with 511 employees, based in Pacifica, California, United States. AeroLeads shows a work email signal at flyzipline.com and a matched LinkedIn profile for William Stopczynski.

William Stopczynski previously worked as Quality Team Lead at Ample and Quality Inspector at Zipline. William Stopczynski holds Machining, Precision Machining from Maplewood Career Center.

Company email context

Email format at Mainspring Energy

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{first}_{last}@flyzipline.com
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AeroLeads found 1 current-domain work email signal for William Stopczynski. Compare company email patterns before reaching out.

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Profile bio

About William Stopczynski

Experienced in Quality with a demonstrated history of working in the aviation and aerospace industry. Skilled in Leadership, Computer Numerical Control (CNC), Quality Auditing, Supplier Quality, and Quality Assurance. Strong quality assurance professional with a focus in developing a quality team.

Current workplace

William Stopczynski's current company

Company context helps verify the profile and gives searchers a useful next step.

Mainspring Energy
Mainspring Energy
Senior Manufacturing Quality Supervisor
San Francisco, CA, US
Website
mainspringenergy.com
Employees
511
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Company profile
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6 roles

William Stopczynski work experience

A career timeline built from the work history available for this profile.

Quality Team Lead

Ample

Brisbane, California, United States

Quality Inspector

Zipline

South San Francisco, California, United States

Feb 2021 - Feb 2023

Quality Inspector

American Precision Gear

Foster City, Ca

Oct 2019 - Nov 2020
Team & coworkers

Colleagues at Mainspring Energy

Other employees you can reach at mainspringenergy.com. View company contacts for 511 employees →

BW Braelynn White Braelynn White Colleague at Mainspring EnergyOwerri, Imo State, Nigeria View → BK Brian Kauffman Brian Kauffman Colleague at Mainspring EnergyGreater Philadelphia, United States View → NG Nima Golchin Nima Golchin Colleague at Mainspring EnergySan Francisco Bay Area, United States View → SM Shelby Miyamoto-Kim Shelby Miyamoto-Kim Colleague at Mainspring EnergyBerkeley, California, United States View → NG Nick Goulding Nick Goulding Colleague at Mainspring EnergySunnyvale, California, United States View → TB Thomas Brawley Thomas Brawley Colleague at Mainspring EnergySan Francisco Bay Area, United States View → AG Aveneet Gill Aveneet Gill Colleague at Mainspring EnergySan Diego, California, United States View → JW Jim Wisniewski Jim Wisniewski Colleague at Mainspring EnergySan Francisco Bay Area, United States View → AL Aaron Lang Aaron Lang Colleague at Mainspring EnergySan Francisco, California, United States View → FY Fred Young Fred Young Colleague at Mainspring EnergyShafter, California, United States View →
1 education record

William Stopczynski education

FAQ

Frequently asked questions about William Stopczynski

Quick answers generated from the profile data available on this page.

What company does William Stopczynski work for?

William Stopczynski works for Mainspring Energy.

What is William Stopczynski's role at Mainspring Energy?

William Stopczynski is listed as Senior Manufacturing Quality Supervisor at Mainspring Energy.

What is William Stopczynski's email address?

AeroLeads has found 1 work email signal at @flyzipline.com for William Stopczynski at Mainspring Energy.

Where is William Stopczynski based?

William Stopczynski is based in Pacifica, California, United States while working with Mainspring Energy.

What companies has William Stopczynski worked for?

William Stopczynski has worked for Mainspring Energy, Ample, Zipline, American Precision Gear, and Nmg Aerospace.

Who are William Stopczynski's colleagues at Mainspring Energy?

William Stopczynski's colleagues at Mainspring Energy include Braelynn White, Brian Kauffman, Nima Golchin, Shelby Miyamoto-Kim, and Nick Goulding.

How can I contact William Stopczynski?

You can use AeroLeads to view verified contact signals for William Stopczynski at Mainspring Energy, including work email, phone, and LinkedIn data when available.

What schools did William Stopczynski attend?

William Stopczynski holds Machining, Precision Machining from Maplewood Career Center.

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