Global Head Of Observability
Current
2021 - Present
~5 yrs 6 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 Jul 2026
3 data sources
Profile completeness 86%
Current company
Role
Innovator | Product and Technology Executive | Ex Founder | Crypto and Digital Payments
Location
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 with 10 employees, based in 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 · 30 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 infrastructure to drive operational efficiency and platform performance. Focused on delivering reliable, high-performance payments infrastructure, fostering cross-functional collaboration, and aligning technology strategies with business objectives across global markets.
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 core ordering platforms Marcom1, Ilex and the launch of Marcom CX. These ordering solutions provide content features and e-Delivery services moving physical print to a digital medium.
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 audits. Challenged by inconsistent/outdated infrastructure and applications as well as an underperforming IT team while launching a new product in the bank.
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 →
CB
Chittibabu Bakthavachalam
Colleague at CitiIrving, Texas, United States
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NS
Nityanand Sonakiya
Colleague at CitiPune, Maharashtra, India
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HP
Hema Priya R
Colleague at CitiChennai, Tamil Nadu, India
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TC
Tapish Chandrawanshi
Colleague at CitiNagpur, Maharashtra, India
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NA
Navdeep Athwal, Phd
Colleague at CitiLondon, England, United Kingdom
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CA
Christina Adams Houston, Phr
Colleague at CitiTampa, Florida, United States
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BD
Brian Degrazia, Phd
Colleague at CitiNew York, United States
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CR
Chris Riley
Colleague at CitiBrooklyn, New York, United States
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MH
Mayra Haro
Colleague at CitiLos Angeles Metropolitan Area, United States
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NM
Nitin Malhotra
Colleague at CitiDelhi, India
View →
Chittibabu Bakthavachalam
Colleague at CitiIrving, Texas, United States
View →
NS
Nityanand Sonakiya
Colleague at CitiPune, Maharashtra, India
View →
HP
Hema Priya R
Colleague at CitiChennai, Tamil Nadu, India
View →
TC
Tapish Chandrawanshi
Colleague at CitiNagpur, Maharashtra, India
View →
NA
Navdeep Athwal, Phd
Colleague at CitiLondon, England, United Kingdom
View →
CA
Christina Adams Houston, Phr
Colleague at CitiTampa, Florida, United States
View →
BD
Brian Degrazia, Phd
Colleague at CitiNew York, United States
View →
CR
Chris Riley
Colleague at CitiBrooklyn, New York, United States
View →
MH
Mayra Haro
Colleague at CitiLos Angeles Metropolitan Area, United States
View →
NM
Nitin Malhotra
Colleague at CitiDelhi, 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, 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 Chittibabu Bakthavachalam, Nityanand Sonakiya, Hema Priya R, Tapish Chandrawanshi, and Navdeep Athwal, Phd.
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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