MDJ Group
VC Fund
Tampa, United States
MDJ Group is a VC fund in Tampa focused on Cyber Security and Information Technology. MDJ Group grows companies in the areas of information security, network infrastructure, and human capital management.
- Total investments:
- 7
- Last investment:
- Lead investor:
- 14%
Last updated:
For AI agents: llms.txt
Industries MDJ Group invests in
Stages MDJ Group invests in
Countries MDJ Group invests in
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Mark Tuszynski
|
|||
Dave Gilden
|
|||
Julio Sanchez
|
|||
Investment Focus
Industry
- Cyber Security 2 (29%)
- Information Technology 2 (29%)
- SaaS 1 (14%)
- Security 1 (14%)
- Software 1 (14%)
Stage
- Seed 3 (43%)
- Pre-Seed 1 (14%)
- Series A 1 (14%)
- Funding Round 1 (14%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
|
Mark Tuszynski
Partner
|
Partner | Total investments: 0 | Find email | |
|
Dave Gilden
Co-Founder & Partner
|
Co-Founder & Partner | Total investments: 0 | Find email | |
|
Julio Sanchez
Partner
|
Partner | Total investments: 0 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
Iris
|
Iris ingests your existing documentation to build a Knowledge Base then uses LLMs to generate new content. Upload Security Questionnaires and RFPs and our proprietary system will extract questions and draft responses and citing sources. Assign questions to co-workers and collaborate to win more deals. Report on revenue attribution, time tocompletion, and time spent responding to questions versus accepting Iris-generated responses. | $2M / Pre-Seed / Jan 04, 2024 | |
Rewst
|
Rewst is a company currently operating in stealth mode. | $4M / Aug 23, 2022 | |
|
Rewst
|
Rewst is a company currently operating in stealth mode. | $4M / Seed / Aug 23, 2022 | |
|
Rewst
|
Rewst is a company currently operating in stealth mode. | $2.5M / Seed / Nov 08, 2021 | |
Perch Security
|
Perch Security is the first Community Defense Platform. Perch makes threat intelligence accessible and affordable for the “everyone else” – organizations who don’t have dedicated threat analyst teams. | Seed / Jun 17, 2016 | |
Sienna Group
|
Sienna Group is a managed security services provider (MSSP). Sienna Group specializes in providing data-centric security solutions to Healthcare, Financial, Government, Retail, and Technology Sectors. | Series A / Jan 31, 2015 | |
HireVergence
|
HireVergence is an IT staffing and recruiting firm that finds top-level cyber security professionals. They provide IT companies with professionals suitable for the vacant positions, enabling candidates to get the job best suited for them and organizations to find top-level cyber security professionals. | Seed / Dec 20, 2011 |
Co-Investors
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FAQ
What does MDJ Group invest in?
MDJ Group invests primarily in Cyber Security, Information Technology and SaaS startups, most often at Seed and Pre-Seed stage. Most of the 7 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact MDJ Group?
Public channels for MDJ Group include LinkedIn and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at MDJ Group?
The team at MDJ Group includes Mark Tuszynski (Partner), Dave Gilden (Co-Founder & Partner) and Julio Sanchez (Partner). The Team section lists each member with their title, investment count and links.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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