Global Head Of Observability
Current
2021 - Present
~5 yrs 4 mos
AeroLeads people directory · profile
Michael Johnson Email & Phone Number
Innovator | Product and Technology Executive | Ex Founder | Crypto and Digital Payments
at
Citi
2 work emails found
@highcastle.co
LinkedIn matched
✓ Verified May 2026
3 data sources
Profile completeness 86%
Current company
Role
Innovator | Product and Technology Executive | Ex Founder | Crypto and Digital Payments
Location
New York, New York, United States
Company size
Who is Michael Johnson? Overview
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Quick answer
Michael Johnson is listed as Innovator | Product and Technology Executive | Ex Founder | Crypto and Digital Payments at Citi, a company with 10 employees, based in New York, New York, United States. AeroLeads shows a work email signal at highcastle.co and a matched LinkedIn profile for Michael Johnson.
Michael Johnson previously worked as GLOBAL HEAD OF OBSERVABILITY at Citi and GLOBAL HEAD OF PAYMENTS SITE RELIABILITY ENGINEERING at Citi.
Company email context
Email format at Citi
This section adds company-level context without repeating Michael Johnson's masked contact details.
{first}.{last}@highcastle.co
89% confidence
AeroLeads found 2 current-domain work email signals for Michael Johnson. Compare company email patterns before reaching out.
Profile bio
About Michael Johnson
Visionary Technology Leader with a robust track record of pioneering digital transformation and architecting cutting-edge solutions that streamline operations, elevate user experience, and fortify security frameworks. Expert in molding technology landscapes to business imperatives, I thrive on catalyzing innovation that drives enterprise value and market distinction. With a hands-on approach to strategic leadership, I champion a culture of excellence and perpetual advancement.Specialties: Faster payments, Instant Payments, Transaction banking, Crypto and NFT, Application Security, scaling applications and teams on cloud based platforms (AWS, OpenShift). Deep experience in user experiences (UX), payments, mobile, API, personalization, design thinking, SRE (observability).
Listed skills include Sdlc, Integration, It Strategy, Vendor Management, and 29 others.
Current workplace
Michael Johnson's current company
Company context helps verify the profile and gives searchers a useful next step.
Citi
9 roles · 29 years
Michael Johnson work experience
A career timeline built from the work history available for this profile.
Global Head Of Payments Site Reliability Engineering
IOversee global payments engineering teams, delivering innovative, scalable solutions for high-volume payment platforms. Lead the development and optimization of secure, real-time payment systems, ensuring compliance with global regulations and enhancing user experience. Leverage deep expertise in system architecture, DevOps automation, and cloud.
2019 - 2021
~2 yrs
Cto And Director Of Engineering At Startup
High Castle
As CTO, I was responsible for the overall technology strategy, development and execution, while building a culture of innovation and a growth mindset within our teams.
2017 - 2019
~2 yrs
Head Of Mutual Funds Development And Engineering
Lead the Mutual Funds division and new startup acquisitions in a hands-on capacity. The Mutual Funds Marketing & Customer Communication division provides a wide range of digital offerings including client facing content management solutions, targeted communications and Digital/On Demand Printing Services. Responsible for the end-to-end development of the.
May 2016 - 2017
Global Head Of Shared Services
Responsible for the end-to-end development of the new CitiDirect Banking Evolution Portal, which provides payments, reports and cross product access to customers across 90+ countries and in over 100+ currencies. In addition, responsible for the TTS shared services hosting platforms which provide infrastructure services to 80+ global applications and.
2008 - Apr 2016
Engineering And Operations, G20 Applications
Responsible for leading a team of engineers to design the “G20” applications and deliver them operationally to market digitally transforming the business from a paper and fax-based process.
2007 - 2008
~1 yr
Application Engineer, Accelor Ecn
Responsible for the end-to-end setup of the Accelor ECN infrastructure and application management. Challenged by aggressive timelines due to market conditions for the build out and rollout of the new concept in the marketplace.
Apr 2006 - Apr 2007
Senior Software Engineer
Served as a lead shared services platform. Accountable for expanded infrastructure and services which a specific focus on the brokerage business both external and internal. Challenged to provide a best in class platform while being cost effective with the additional regulatory pressures from merging the brokerage with the bank.
2000 - 2006
~6 yrs
Founder/Owner
Xyphoid Interactive
Bulletin Board Service turned Internet Service Provider, which also provided consulting expertise to surrounding startups in the Capital District Areas
1997 - 2000
~3 yrs
Team & coworkers
Colleagues at Citi
Other employees you can reach at citibank.com. View company contacts for 10 employees →
JB
Jada Bolden
Colleague at Citi
Metro Jacksonville, United States, United States
View →
KW
Kay Wakeham
Colleague at Citi
Irving, Texas, United States, United States
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KC
Kyle Clark
Colleague at Citi
Irving, Texas, United States, United States
View →
JT
Jonathan Tsang
Colleague at Citi
United States, United States
View →
CB
Chittibabu Bakthavachalam
Colleague at Citi
Irving, Texas, United States, United States
View →
ZS
Zac Sutton
Colleague at Citi
Portland, Oregon Metropolitan Area, United States, United States
View →
SW
Sheila Whitaker
Colleague at Citi
Carrollton, Texas, United States, United States
View →
BG
Bruce Garber
Colleague at Citi
Boynton Beach, Florida, United States, United States
View →
KP
Konrad Pociask
Colleague at Citi
Singapore, Singapore
View →
HR
Hrishikesh R.
Colleague at Citi
Mumbai, Maharashtra, India, India
View →
Jada Bolden
Colleague at Citi
Metro Jacksonville, United States, United States
View →
KW
Kay Wakeham
Colleague at Citi
Irving, Texas, United States, United States
View →
KC
Kyle Clark
Colleague at Citi
Irving, Texas, United States, United States
View →
JT
Jonathan Tsang
Colleague at Citi
United States, United States
View →
CB
Chittibabu Bakthavachalam
Colleague at Citi
Irving, Texas, United States, United States
View →
ZS
Zac Sutton
Colleague at Citi
Portland, Oregon Metropolitan Area, United States, United States
View →
SW
Sheila Whitaker
Colleague at Citi
Carrollton, Texas, United States, United States
View →
BG
Bruce Garber
Colleague at Citi
Boynton Beach, Florida, United States, United States
View →
KP
Konrad Pociask
Colleague at Citi
Singapore, Singapore
View →
HR
Hrishikesh R.
Colleague at Citi
Mumbai, Maharashtra, India, India
View →
FAQ
Frequently asked questions about Michael Johnson
Quick answers generated from the profile data available on this page.
What company does Michael Johnson work for?
Michael Johnson works for Citi.
What is Michael Johnson's role at Citi?
Michael Johnson is listed as Innovator | Product and Technology Executive | Ex Founder | Crypto and Digital Payments at Citi.
What is Michael Johnson's email address?
AeroLeads has found 2 work email signals at @highcastle.co for Michael Johnson at Citi.
Where is Michael Johnson based?
Michael Johnson is based in New York, New York, United States while working with Citi.
What companies has Michael Johnson worked for?
Michael Johnson has worked for Citi, High Castle, Broadridge, Marsh, and Fxall.
Who are Michael Johnson's colleagues at Citi?
Michael Johnson's colleagues at Citi include Jada Bolden, Kay Wakeham, Kyle Clark, Jonathan Tsang, and Chittibabu Bakthavachalam.
How can I contact Michael Johnson?
You can use AeroLeads to view verified contact signals for Michael Johnson at Citi, including work email, phone, and LinkedIn data when available.
What skills is Michael Johnson known for?
Michael Johnson is listed with skills including Sdlc, Integration, It Strategy, Vendor Management, Disaster Recovery, Networking, Data Center, and Application Servers.
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