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[Blog Demo](https://oappsinfotech.com/ot-blog-demo) - [Contact](https://oappsinfotech.com/ot-dev-contact) - Legal Stuff - Privacy Policy - Resources - [Faq](https://oappsinfotech.com/ot-dev-faq) - [Documentation](https://oappsit.com/hubspot/twentyone/index.html) - [+1 0234 56 7890](tel:+1%200234%2056%207890) - [hello@twentyone.com](mailto:{{item.email}}) [Follow us on Facebook](https://www.facebook.com) [Follow us on Twitter](https://twitter.com) [Follow us on Instagram](https://www.instagram.com) [Follow us on Linkedin](https://www.linkedin.com/) [Purchase Theme](https://app.hubspot.com/l/ecosystem/marketplace/assets/themes/twentyone-by-oappsit) # Our Team Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect. ![Team-1](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-01.jpg) ##### Mark S Jhonson CEO, of TwentyOne ##### Mark S Jhonson CEO, of TwentyOne - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-2](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-02.jpg) ##### Merry Armstrong Project Manager ##### Merry Armstrong Project Manager - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-3](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-03.jpg) ##### Dawid Malan Senior Developer ##### Dawid Malan Senior Developer - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-4](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-04.jpg) ##### Josephine Langford Designer ##### Josephine Langford Designer - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-5](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-05.jpg) ##### David Warner CEO, of TwentyOne ##### David Warner CEO, of TwentyOne - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-6](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-06.jpg) ##### Mark S Jhonson Project Manager ##### Mark S Jhonson Project Manager - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-7](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-07.jpg) ##### Josephine Langford Senior Developer ##### Josephine Langford Senior Developer - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) ![Team-8](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-08.jpg) ##### Merry Armstrong Designer ##### Merry Armstrong Designer - [Click to contact on facebook](https:://www.facebook.com) - [Click to contact on instagram](https:://www.instagram.com) - [Click to contact on linkedin](https:://www.linkedin.com) - [Click to contact on twitter](https:://www.twitter.com) Web Development App Development UI/UX Designer Digital Marketing - [Web Development](https://oappsinfotech.com/ot-dev-team#teamtab1-dnd_area-dnd_partial-5-module-2) - [App Development](https://oappsinfotech.com/ot-dev-team#teamtab2-dnd_area-dnd_partial-5-module-2) - [UI/UX Designer](https://oappsinfotech.com/ot-dev-team#teamtab3-dnd_area-dnd_partial-5-module-2) - [Digital Marketing](https://oappsinfotech.com/ot-dev-team#teamtab4-dnd_area-dnd_partial-5-module-2) ![Team-1](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-01.jpg) ###### Mark S Jhonson Web Developer ###### Mark S Jhonson Web Developer - [Click to contact Mark S Jhonson on facebook](https:://www.facebook.com) - [Click to contact Mark S Jhonson on instagram](https:://www.instagram.com) - [Click to contact Mark S Jhonson on linkedin](https:://www.linkedin.com) - [Click to contact Mark S Jhonson on twitter](https:://www.twitter.com) ![Team-2](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-02.jpg) ###### Merry Armstrong Web Developer ###### Merry Armstrong Web Developer - [Click to contact Merry Armstrong on facebook](https:://www.facebook.com) - [Click to contact Merry Armstrong on instagram](https:://www.instagram.com) - [Click to contact Merry Armstrong on linkedin](https:://www.linkedin.com) - [Click to contact Merry Armstrong on twitter](https:://www.twitter.com) ![Team-3](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-03.jpg) ###### Dawid Malan Web Developer ###### Dawid Malan Web Developer - [Click to contact Dawid Malan on facebook](https:://www.facebook.com) - [Click to contact Dawid Malan on instagram](https:://www.instagram.com) - [Click to contact Dawid Malan on linkedin](https:://www.linkedin.com) - [Click to contact Dawid Malan on twitter](https:://www.twitter.com) ![Team-4](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-04.jpg) ###### Josephine Langford Web Developer ###### Josephine Langford Web Developer - [Click to contact Josephine Langford on facebook](https:://www.facebook.com) - [Click to contact Josephine Langford on instagram](https:://www.instagram.com) - [Click to contact Josephine Langford on linkedin](https:://www.linkedin.com) - [Click to contact Josephine Langford on twitter](https:://www.twitter.com) ![Team-1](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-05.jpg) ###### Justin Langer App Development ###### Justin Langer App Development - [Click to contact Justin Langer on facebook](https:://www.facebook.com) - [Click to contact Justin Langer on instagram](https:://www.instagram.com) - [Click to contact Justin Langer on linkedin](https:://www.linkedin.com) - [Click to contact Justin Langer on twitter](https:://www.twitter.com) ![Team-2](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-06.jpg) ###### Steve Waugh App Development ###### Steve Waugh App Development - [Click to contact Steve Waugh on facebook](https:://www.facebook.com) - [Click to contact Steve Waugh on instagram](https:://www.instagram.com) - [Click to contact Steve Waugh on linkedin](https:://www.linkedin.com) - [Click to contact Steve Waugh on twitter](https:://www.twitter.com) ![Team-3](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-07.jpg) ###### D'Arcy Short App Development ###### D'Arcy Short App Development - [Click to contact D'Arcy Short on facebook](https:://www.facebook.com) - [Click to contact D'Arcy Short on instagram](https:://www.instagram.com) - [Click to contact D'Arcy Short on linkedin](https:://www.linkedin.com) - [Click to contact D'Arcy Short on twitter](https:://www.twitter.com) ![Team-1](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-08.jpg) ###### Smriti Mandhana UI/UX Designer ###### Smriti Mandhana UI/UX Designer - [Click to contact Smriti Mandhana on facebook](https:://www.facebook.com) - [Click to contact Smriti Mandhana on instagram](https:://www.instagram.com) - [Click to contact Smriti Mandhana on linkedin](https:://www.linkedin.com) - [Click to contact Smriti Mandhana on twitter](https:://www.twitter.com) ![Team-2](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-01.jpg) ###### Merry Armstrong UI/UX Designer ###### Merry Armstrong UI/UX Designer - [Click to contact Merry Armstrong on facebook](https:://www.facebook.com) - [Click to contact Merry Armstrong on instagram](https:://www.instagram.com) - [Click to contact Merry Armstrong on linkedin](https:://www.linkedin.com) - [Click to contact Merry Armstrong on twitter](https:://www.twitter.com) ![Team-1](https://oappsinfotech.com/hubfs/raw_assets/public/Themes/onetheme-dev/images/custom-images/team-vertical-05.jpg) ###### Mark S Jhonson Digital Marketing ###### Mark S Jhonson Digital Marketing - [Click to contact Mark S Jhonson on facebook](https:://www.facebook.com) - [Click to contact Mark S Jhonson on instagram](https:://www.instagram.com) - [Click to contact Mark S Jhonson on linkedin](https:://www.linkedin.com) - [Click to contact Mark S Jhonson on twitter](https:://www.twitter.com) ## Get HubSpot Theme Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings. Purchase Theme [![logo-light](https://oappsinfotech.com/hs-fs/hubfs/OneTheme/logo/logo-light.png?width=250&height=50&name=logo-light.png "logo-light")](https://inceptionsystem-4172253.hs-sites.com/ot-dev-home-1) Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings. Address: Los Angeles, CA, USA Call: [+1 9876 00 1230](tel:+1%209876001234) Email: [hello@twentyone.com](mailto:hello@twentyone.com) ##### Menu - [Home Page](https://oappsinfotech.com/ot-dev-home-1) - [About Us](https://oappsinfotech.com/ot-dev-about-1) - [Service](https://oappsinfotech.com/ot-dev-services) - [Case Studies](https://oappsinfotech.com/ot-dev-case-study) - [Contact Us](https://oappsinfotech.com/ot-dev-contact) - [Latest Blogs](https://oappsinfotech.com/ot-blog) ##### Solutions - [Sample About Page](https://oappsinfotech.com/sample-about) - [Sample Contact Page](https://oappsinfotech.com/contact-page) - [Default HubSpot Blog](https://oappsinfotech.com/blog) - [Demo Home](https://oappsinfotech.com/demo-blog-theme-2021) ##### News - [Home Page](https://oappsinfotech.com/ot-dev-home-1) - [About Us](https://oappsinfotech.com/ot-dev-about-1) - [Service](https://oappsinfotech.com/ot-dev-services) - [Case Studies](https://oappsinfotech.com/ot-dev-case-study) - [Contact Us](https://oappsinfotech.com/ot-dev-contact) - [Latest Blogs](https://oappsinfotech.com/ot-blog) ##### Follow Us - [Home Page](https://oappsinfotech.com/ot-dev-home-1) - [About Us](https://oappsinfotech.com/ot-dev-about-1) - [Service](https://oappsinfotech.com/ot-dev-services) - [Case Studies](https://oappsinfotech.com/ot-dev-case-study) - [Contact Us](https://oappsinfotech.com/ot-dev-contact) - [Latest Blogs](https://oappsinfotech.com/ot-blog) - [Home Page](https://oappsinfotech.com/ot-dev-home-1) - [About Us](https://oappsinfotech.com/ot-dev-about-1) - [Service](https://oappsinfotech.com/ot-dev-services) - [Case Studies](https://oappsinfotech.com/ot-dev-case-study) - [Contact Us](https://oappsinfotech.com/ot-dev-contact) - [Latest Blogs](https://oappsinfotech.com/ot-blog) Copyright © 2026 TwentyOne. 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