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Stefan Weitz Email & Phone Number

CEO at HumanX, General Partner for SilverCircle, Angel Investor, 3x Founder at HumanX
Location: United States 27 work roles 1 school
1 work email found @microsoft.com 2 phones found area 206 and 502 LinkedIn matched
✓ Verified Jul 2026 4 data sources Profile completeness 100%

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Work email s****@microsoft.com
Direct phone (206) ***-****
LinkedIn Profile matched
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Current company
Role
CEO at HumanX, General Partner for SilverCircle, Angel Investor, 3x Founder
Location
United States

Who is Stefan Weitz? Overview

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Quick answer

Stefan Weitz is listed as CEO at HumanX, General Partner for SilverCircle, Angel Investor, 3x Founder at HumanX, based in United States. AeroLeads shows a work email signal at microsoft.com, phone signal with area code 206, 502, and a matched LinkedIn profile for Stefan Weitz.

Stefan Weitz previously worked as Co-Founder and CEO at Humanx and General Partner at Silvercircle. Stefan Weitz holds Ma, Poli Sci, Physics from Gonzaga University.

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Email format at HumanX

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*@microsoft.com
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Profile bio

About Stefan Weitz

An 18-year Microsoft veteran who built technologies used by 1B people across the planet - and then successfully sold the 2nd largest independent eCommerce company in NA. A best-selling author on technology as magic, multi-patent holder and angel investor, Stefan lives to dream up and then build the future.Currently, Stefan the CEO and co-founder of HumanX, the world's preeminent AI gathering to ensure organizations across the world can navigate their AI journey. Before that, he was an Operating Partner at Sterling Partners and led the incubator to launch 4 companies in 4 years. Prior to Sterling, he was the EVP of Advanced Technologies at Radial, helping retailers and brands thrive in an ever-changing and complex e-Commerce world. He is responsible for 350+ business and engineering leaders who are instrumental in running a profitable $250M business. Radial successfully exited for $850M in Nov 2017 to bPost. Until 2016, Stefan Weitz was the Senior Director of Search at Microsoft and charged with working with people and organizations across the industry build and promote Search technologies. Prior to Search, Stefan led the development of Microsoft’s next generation online platforms and was the GM of Microsoft's muni WiFi strategy and implementation, leading the charge to blanket free WiFi access across metropolitan cities - that spectacularly failed. Stefan has been writing code since he was 8 years old and is fluent in both hardware and software architecture, trends, and potentials. In his career, has led various groups in Windows, Security, and global business strategy in roles ranging from development to program management, business development to marketing. Stefan holds a half-dozen patents in various disciplines and is a frequent lecturer to industry and academic groups on the future of information storage, retrieval, and usage.He is on the GenCon Board for Conservation International and active in Endeavor Global, a non-profit dedicated to incubating high-impact startups in developing markets. Stefan is assisting the nation’s youngest VC to promote entrepreneurism to high school students via "The Third Door".

Listed skills include Strategy, Product Management, Strategic Partnerships, Start Ups, and 26 others.

Current workplace

Stefan Weitz's current company

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HumanX
Humanx
CEO at HumanX, General Partner for SilverCircle, Angel Investor, 3x Founder
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27 roles · 21 years

Stefan Weitz work experience

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

Co-Founder And Ceo

Current

HumanX is an organization building the premier community for artificial intelligence (AI) and its deployment. Its flagship event will be a large-scale industry gathering that is forging dialogue, confidence, and conviction for decisionmakers in AI. Backed with venture capital from Primary, Foundation, FPV and SilverCircle, this event and community is the preeminent place for organizations to make their fate.

Mar 2024 - Present

General Partner

Current

SilverCircle is an invite-only, committed capital pool comprised primarily of entrepreneurs and founders from around the globe all committed to funding leading global companies. We use the power of our community to change the outcome in venture and build durable, meaningful relationships between our partners and companies in which we invest.

Sep 2021 - Present

Strategic Advisor

Current

New York, Ny, Us

Velou is the leading AI company to help fix search and discovery in eCommerce.

Feb 2021 - Present

Co-Founder And Founding Cpo

Current

Los Angeles, Ca, Us

Giant is a platform that connects the world's most promising artists to their most passionate fans.

Jul 2020 - Present

Investor And Advisor

Current

King Of Prussia, Pennsylvania, Us

Making clinical trials more effective and efficient to bring new life saving therapies to market.

Oct 2020 - Present

Co-Founder And Director

Current

Chicago, Ilinois, Us

Stella Center is working to solve the nation's Trauma crisis. Through our proprietary Lipov Method leveraging the proven Stellate Ganglion Block, we are able to treat the symptoms of PTSD in over 85% of cases.

Apr 2020 - Present

Board Member

Current

New York, Us

Cyborg is the most efficient compression algorithm and the only encrypted search technology on the planet. If you ever watched Silicon Valley, this is inside-out.

Mar 2018 - Present

Board Member

Current

Santiago, Santiago, Cl

Alto is helping retailers mitigate losses across the entire supply chain, from the shipping yard to the store.

Nov 2018 - Present

Founder And Managing Director

Current
Indefinite Horizon, Llc

IH is my holding and investment company designed to incubate and launch new concepts and companies throughout the world.

Jan 2016 - Present

Founder

Jetson

Jetson is the world's first and only seasonal probiotic that changes with your body. Our mission is to make everyone healthier, starting with their gut. Helped hundreds of thousands heal their gut, but ultimately closed the business.

May 2019 - Jan 2024

Managing Director And Co-Founder

87

'87 is a new type of investor that uses our proven model to launch and scale leading D2C companies.

Apr 2019 - Jul 2023

Board Member

Irvine, Ca, Us

Board member advising on the technical aspects of bringing infrastructure construction and maintenance into a more modern space. Company sold to AEP in 2021.

Jun 2018 - Aug 2021

Board Director And Technical Advisor Pre-Ipo

Salt Lake City, Ut, Us

IPO'ed in 2022.

Apr 2017 - Aug 2020

Board Member

Palo Alto, California, Us

Feb 2018 - Jul 2019

Board Member

Chicago, Il, Us

Jan 2015 - Sep 2018

Board Member

Bethesda, Maryland, Us

Successfully exited this company to TA.

Nov 2017 - Aug 2018

Executive Vice President, Advanced Technology And Chief Product Officer

Us

I led Radial's efforts to enable retailers and brands across the world to fully embrace the opportunities afforded to those who excel in eCommerce. Many in retail are struggling today with delivering on consumer eCommerce expectations - and doing so profitably is even more of an elusive feat. Radial is the world's trusted partner to these companies to help them outperform their competitors and drive consumer loyalty in the process. Combining both world-class technology and proven operational excellence, Radial exists to help retailers embrace Confident Commerce.As the EVP of technology, I oversaw the our 320+ person overall business and engineering teams that drive Radial's #1 rated omnichannel eCommerce tech stack with over 20k stores served and our payment business that processes over $6B in annual billings while delivering the world's only "fraud-free guarantee" for payments. Our retailers never paid a penny in fraud chargebacks thanks to Radial's sophisticated fraud technologies and our world-class engineers and analysts.We exited this PE-backed company to Belgian Post for $870M in 2018.

Feb 2016 - Mar 2018

Board Member

Kirkland, Wa, Us

Acquired by Mad Mobile.

Feb 2016 - Apr 2017

Senior Director, Strategy And Partnerships

Redmond, Washington, Us

Google was killing Microsoft in the education market. That didn't seem right to me.Before I left Microsoft, I wanted my last tour of duty to be something to change the trajectory of the planet for good. Myself and Eric Rudder began the journey to rethink education from first principles and to to identify who was making material progress in education, both technically and otherwise, and then work to synthesize these concepts into a coherent strategy for how Microsoft (and other willing partners) can help to advance the state of the art in EDU.

Mar 2015 - Feb 2016

Senior Director & Chief Evangelist, Bing

Redmond, Washington, Us

Doing AI before it was all cool now. Search was broken. Google answered only 1 in 4 queries were sucessfully and yet people loved it. We knew we could do better and make a profitable business for Microsoft. So off we went. * Member of the founding team charged with bringing the search engine to market; grown share from 7.4% to over 28% Bing-powered search in the US* Championed designs of key search functions including social search, tablet and mobile-based search, visual search, and authored a half-dozen patents covering varying inventions for next-gen search models* Key pivot person for all aspects of the search portfolio, from business development to engineering, and marketing to legal and regulatory matters globally* Primary speaker, writer, and thought leader of search technologies, establishing Microsoft as a credible player among consumer, academic, and industry audiences* Envisoned and built unique programs in education, Veterans Affairs, and entrepreneurship that used technology to solve key challenges for each group

2010 - Nov 2014

Chief Product Officer, Msn

Redmond, Washington, Us

The role was simple: reinvent everything online. I led the strategy and development for the next-generation web-based information and service platform, mainly known as MSN. The platform reached 150MM people across the world and had a 15 year legacy; our challenge was to take advantage of the secular trends (personal data, social connections, recommendations, and multimedia) to build an entirely new experience while maintaining $2BB legacy asset. I owned product strategy, full-stack business modeling, partner development, GTM, and managed a development team spread across 4 continents.* Envisioned, designed, and developed cutting-edge working technical model and recruited global teams to realize the strategy through a next generation consumer web experience* Built entirely new global development process that spanned teams across Microsoft, including senior leaders from business development, content strategy, monetization, and nearly a dozen technical groups* Conducted technical evaluations and led due diligence on several companies and technologies in order to accelerate MSN’s transformation

Jan 2008 - Dec 2009

Gm - Microsoft Wifi

Redmond, Washington, Us

Imagine a world where everyone was online at high speed all the time. That was the dream back in 2006 when I created Microsoft Muni WiFi. In this position, I designed an entire blue-sky business - blessed by Microsoft's CEO and Chairman - to unwire metropolitan areas with free internet access. I led the business and technical strategy for developing ubiquitous WiFi access. In this capacity I was in charge of technical development for outdoor WiFi tech, full-stack business modeling, marketing, technical product strategy (including 3 patents), external evangelism, global deployment , and municipal government negotiations.* Envisioned and developed blue sky business strategy, model and product plan to ‘unwire’ metropolitan cities using an ad-supported WiFi mesh networks* Led all aspects of the business – strategy, business development, marketing, product development, and partner management necessary to launch the networks in several US cities (Portland, Milwaukee, Santa Clara, Concord); responsible for $250mm P/L* Became Microsoft’s global expert on Muni WiFi and mesh networking, speaking at numerous industry events and featured in various industry publications

2006 - Jun 2008

Director, Windows Server Incubations

Redmond, Washington, Us

Linux was seen to be a cancer, and Microsoft had to beat it. That was my job.To do that, we had to act like Linux. We built an effective open-source plan focusing on building and incorporating ‘community’ input and features into the Windows Server product line. 22 feature teams within Windows Server integrated open source development models into their product build process.Also as part of this role, me and my team envisioned and launched several industry-first products, including “The Working Network” (MS’ first web metatagging solution), Community Bar (incubation that enabled real-time and asynchronous collaboration across heterogeneous sites) and Microsoft Connect (enabling customer-led dogfooding of MS products).

Aug 2004 - Jan 2006

Director –Technical Strategy And Architecture / Trustworthy Computing

Redmond, Washington, Us

You may recall Microsoft had a problem with Reliability in our early products: painful for consumers but a non-starter for enterprises. The job? Figure out how to fix reliability, prove it and then tell the world about it.* Accountable for overall “Reliability” pillar strategy and execution for Microsoft; led cross-company team to define, measure and improve reliability of Microsoft products* Implemented technology and process best-practices across product groups, academia, and ISV/IHVs to more than triple Windows reliability during my tenure; served as MarComm director for all PR/AR and customer events

Aug 2002 - Aug 2004

Hunter And Gpm Of Microsoft Security

Redmond, Washington, Us

Just after 9/11, a certain terroirst group claimed they planted trojans in Windows. They didn't. But my job was to lead the team to make sure...* Tasked by our CEO and CIO, I designed, scoped, for the industry’s largest-ever initiative to protect source code from compromise across every technical and physical attack vector to guard 100MM+ lines of code.* Led cross-company team to derive and implement the optimum design for a logically segmented network using IPSEC to mitigate risk of unauthorized devices on the network* Developed comprehensive risk analysis and mitigation methodology for deriving risk to an enterprise’s information assets* Authored and delivered several technical and business-focused papers and talks to customers, press, and internal audiences on topics ranging from Information Security measures to overall Trustworthy Computing

Apr 2002 - Apr 2003
1 education record

Stefan Weitz education

  • Gonzaga University
    Gonzaga University
    Physics
FAQ

Frequently asked questions about Stefan Weitz

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

What company does Stefan Weitz work for?

Stefan Weitz works for HumanX.

What is Stefan Weitz's role at HumanX?

Stefan Weitz is listed as CEO at HumanX, General Partner for SilverCircle, Angel Investor, 3x Founder at HumanX.

What is Stefan Weitz's email address?

AeroLeads has found 1 work email signal at @microsoft.com for Stefan Weitz at HumanX.

What is Stefan Weitz's phone number?

AeroLeads has found 2 phone signal(s) with area code 206, 502 for Stefan Weitz at HumanX.

Where is Stefan Weitz based?

Stefan Weitz is based in United States while working with HumanX.

What companies has Stefan Weitz worked for?

Stefan Weitz has worked for Humanx, Silvercircle, Velou, Giant, and Datacubed Health.

How can I contact Stefan Weitz?

You can use AeroLeads to view verified contact signals for Stefan Weitz at HumanX, including work email, phone, and LinkedIn data when available.

What schools did Stefan Weitz attend?

Stefan Weitz holds Ma, Poli Sci, Physics from Gonzaga University.

What skills is Stefan Weitz known for?

Stefan Weitz is listed with skills including Strategy, Product Management, Strategic Partnerships, Start Ups, Entrepreneurship, Marketing, Partner Management, and Mobile Devices.

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