Stephanie Koster
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Stephanie Koster Email & Phone Number

Managing Partner at Subutai Capital Partners
Location: Redmond, Washington, United States 13 work roles 3 schools
1 work email found @sncorp.com 6 phones found area 425, 253, and 775 LinkedIn matched
✓ Verified Jun 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 6 phones

Work email s****@sncorp.com
Direct phone (425) ***-****
LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Role
Managing Partner
Location
Redmond, Washington, United States

Who is Stephanie Koster? Overview

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Quick answer

Stephanie Koster is listed as Managing Partner at Subutai Capital Partners, based in Redmond, Washington, United States. AeroLeads shows a work email signal at sncorp.com, phone signal with area code 425, 253, 775, and a matched LinkedIn profile for Stephanie Koster.

Stephanie Koster previously worked as Member Board of Trustees at National Test Pilot School and Chief Executive Officer at Defense Technologies, Inc. Stephanie Koster holds Mba, Finance from Uw Foster School Of Business.

Company email context

Email format at Subutai Capital Partners

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{first}.{last}@sncorp.com
86% confidence

AeroLeads found 1 current-domain work email signal for Stephanie Koster. Compare company email patterns before reaching out.

Profile bio

About Stephanie Koster

Stephanie Koster is currently the CEO of Defense Technologies Inc, an acquisition company with holdings across the Americas with a focus on bringing cutting-edge solutions to the US Government and National Security Ecosystem. She brings extensive experience in domestic and international strategy, finance, and operations focused on technology, innovation and high growth companies. In addition to her role with Defense Technologies Inc., she currently sits on a number of boards.In 2011, she was recruited to be CFO / Director and Treasurer of Blue Origin, LLC and its affiliates for CEO and Amazon founder Jeff Bezos. For 7 years, Ms. Koster headed up all Finance and Business Operations: Program Management, Supplier Management, IT and Cybersecurity, Enterprise Systems and Tools, Risk & Insurance, Human Resources, Finance, Accounting and Tax for the consolidated companies. In this role, Ms. Koster was responsible for building scalable enterprise-wide processes, systems and tools, and multi-site business operations to drive company growth.Prior to Blue Origin, Ms. Koster held senior leadership positions at The Boeing Company in International Business Strategy, Corporate Development/M&A, Global Venture Capital, and Technology Planning & Acquisition. Working with corporate and subsidiary technology leadership, she developed international market strategies and business models for next-generation satellite communication and situation awareness technologies, as well as strategies to productize leading edge technologies for global industrial and government markets – extensively in Asian Pacific, European, US DoD, and emerging markets. Other work includes executive roles at Sierra Nevada Corporation and Vector Launch, board member of the Association of Washington Business, Treasurer of the Blue Origin Political Action Committee, founding Advisory Board Member of a $3B+ investment/merchant banking firm, adjunct University professor, and Deloitte audit & assurance. Ms. Koster has earned an MBA from the University of Washington, a BA in Economics & Accounting from Calvin University, a CPA license and US DoD Secret Clearance. Ms. Koster has judged the University of Washington’s Strategy Development Competition, lectured on careers in finance, and mentored students and employees. She has a passion for various charitable endeavors, especially those focused on adoption and foster care.

Listed skills include Business Strategy, Venture Capital, Operations Management, Management, and 29 others.

Current workplace

Stephanie Koster's current company

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

Subutai Capital Partners
Subutai Capital Partners
Managing Partner
Redmond, WA, US
AeroLeads page
13 roles

Stephanie Koster work experience

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

Member Board Of Trustees

Current

Mojave, CA, US

NTPS, “The World’s Test Pilot School”, the premiere total flight test and advanced flight training and education organization in the world.

May 2023 - Present

Chief Executive Officer

Current
Defense Technologies, Inc
Jan 2024 - Present

Member Strategic Advisory Board

Pipeline2Space
Oct 2022 - Aug 2024

Member Strategic Advisory Board

Spokane, Washington, US

Sep 2022 - Aug 2024

Member Strategic Advisory Board

Huntington Beach, California, US

Debtor in possession thru to bankruptcy 2019 - 2023

Mar 2019 - Sep 2019

Cfo / Director And Treasurer

Kent, WA, US

Jan 2011 - Oct 2017

Strategic Planning, M&A And International Finance

Arlington, VA, US

Jan 2002 - Jan 2011
3 education records

Stephanie Koster education

Mba, Finance

Uw Foster School Of Business

Ba, Economics

Calvin University

Cpa

Washington State Board Of Accountancy
FAQ

Frequently asked questions about Stephanie Koster

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

What company does Stephanie Koster work for?

Stephanie Koster works for Subutai Capital Partners.

What is Stephanie Koster's role at Subutai Capital Partners?

Stephanie Koster is listed as Managing Partner at Subutai Capital Partners.

What is Stephanie Koster's email address?

AeroLeads has found 1 work email signal at @sncorp.com for Stephanie Koster at Subutai Capital Partners.

What is Stephanie Koster's phone number?

AeroLeads has found 6 phone signal(s) with area code 425, 253, 775 for Stephanie Koster at Subutai Capital Partners.

Where is Stephanie Koster based?

Stephanie Koster is based in Redmond, Washington, United States while working with Subutai Capital Partners.

What companies has Stephanie Koster worked for?

Stephanie Koster has worked for Subutai Capital Partners, National Test Pilot School, Defense Technologies, Inc, Pipeline2Space, and Hypersciences, Inc.

How can I contact Stephanie Koster?

You can use AeroLeads to view verified contact signals for Stephanie Koster at Subutai Capital Partners, including work email, phone, and LinkedIn data when available.

What schools did Stephanie Koster attend?

Stephanie Koster holds Mba, Finance from Uw Foster School Of Business.

What skills is Stephanie Koster known for?

Stephanie Koster is listed with skills including Business Strategy, Venture Capital, Operations Management, Management, Portfolio Management, Corporate Finance, Financial Accounting, and Managerial Finance.

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