Technology specialists
We focus on markets where our investors have relevant operating experience, perspective, and relationships.
Built by operators. Backing the next generation.
Capital for the moment. Operators for what comes next.
MDJ Group partners with ambitious founders and CEOs at pivotal moments of growth. We invest capital, bring decades of operating experience, and work alongside leadership teams to build enduring technology companies.
2002Founded in Tampa
Operator-ledBuilt and scaled technology businesses
Founder-alignedCapital and practical perspective
Who we partner with
Focused on companies where our experience can make a difference.
We invest selectively in B2B technology businesses with strong leadership, meaningful customer needs, and the potential to create lasting value.
Operator leverage
We look for opportunities where practical guidance and access can be as valuable as the capital invested.
Aligned leadership
We partner with founders and CEOs who value candid collaboration, disciplined execution, and durable growth.
Our approach
More than capital. A partner in the work.
The right investment should strengthen more than a balance sheet. MDJ combines aligned capital with practical operating guidance—helping leadership teams make consequential decisions, improve execution, and navigate major inflection points with confidence.
Invest with alignment
We begin with a shared understanding of the opportunity, the challenges ahead, and what long-term success should look like.
Work alongside leaders
We contribute experience and perspective while respecting the vision and authority of the people building the company.
Build for scale
We help strengthen the strategies, teams, systems, and relationships required for the company’s next stage.
Current portfolio
Partnering with companies built to lead.
We back technology businesses solving meaningful problems in growing markets—and support their leaders as ambition becomes scale.
AI / Automation
Rewst
Automation for managed service providers, with deep integrations and prebuilt workflows.
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AI
Iris
A proposal and RFP operating system spanning bid decisions, responses, reviews, and approvals.
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Cybersecurity
PHIN Security
Security-awareness training and phishing simulation built for MSPs and MSSPs.
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Cybersecurity
inforcer
Multi-tenant Microsoft 365 management, threat detection, and response for MSPs.
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Network intelligence
Domotz
Agent-native network monitoring and management for remote resolution across sites.
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AI security
Netarx
Real-time detection of AI-generated impersonation and deepfakes across communication channels.
Visit companyOur track record
Successful Exits.
Experience built by building businesses.
Companies our team has helped build, grow, and successfully exit—experience we bring to the founders we back today.
Exited · 2009
Acuity Solutions
Cybersecurity solutions and services. Acquired by FishNet Security.
Read coverageExited · 2020
Perch Security
Threat detection and security operations for managed service providers. Acquired by ConnectWise.
Read coverageExited · 2018
Sienna Group
Managed data security, risk assessment, and compliance services. Acquired by ConnectWise.
Read coverageExited · 2020
HireVergence
Cybersecurity and IT talent recruitment. Acquired by Job.com.
Read coverageExited
Altimeter Solutions
Technical staffing supporting federal agencies and their contracting partners.
How we help
Experience when the decisions get bigger.
Our team has founded, financed, scaled, operated, and exited technology businesses. We bring that experience to the moments that matter most.
01
Go-to-market & revenue
Market positioning, sales strategy, channel development, customer introductions, and repeatable revenue growth.
02
Leadership & organization
Executive recruitment, organizational design, management development, and incentive alignment.
03
Finance & operations
Financial planning, performance measurement, operating discipline, scalable systems, and margin improvement.
04
Capital & strategic opportunities
Follow-on financing, investor relationships, partnerships, acquisitions, and preparation for successful outcomes.
Leadership
Operators first. Investors by experience.
MDJ was founded by technology executives who understand the weight of building a company because they have done it themselves. Our partners bring complementary experience across executive leadership, finance and operations, and sales and revenue growth.
DG
Dave Gilden
Managing PartnerTechnology entrepreneur, investor, and executive advisor with extensive experience building companies and helping startups scale. Dave leads MDJ’s investment strategy and works closely with founders on executive decisions, positioning, follow-on capital, client introductions, and long-term value creation.
LinkedIn profileMT
Mark Tuszynski
PartnerInvestor and finance and operations executive with decades of experience helping technology businesses grow. Mark advises founders on financial planning, operating discipline, scalable systems, performance management, capital strategy, and the infrastructure required to support the next stage of growth.
LinkedIn profileJS
Julio Sanchez
PartnerInvestor and revenue executive with deep experience scaling technology companies through direct and channel sales. Julio helps leadership teams sharpen go-to-market strategy, build productive sales organizations, open client and partner relationships, and create repeatable engines for revenue growth.
LinkedIn profileInvestor / Advisor network
Experience and relationships beyond the investment.
MDJ’s Investor / Advisors are accomplished founders, executives, and business leaders. Together, they extend the experience, industry perspective, customer relationships, and strategic reach available to the companies we support.
DT
Dan Thormodsgaard
Investor / AdvisorCybersecurity technology strategist and former co-founder and CTO of Fishtech Group.
LinkedIn profileAG
AC
Aharon Chernin
Investor / AdvisorFounder of Rewst with more than 25 years of experience building technology for managed service providers.
LinkedIn profileRC
Rob Carey
Investor / AdvisorTechnology and cybersecurity executive whose leadership experience spans the U.S. Navy, Department of Defense, and private-sector data and technology organizations.
LinkedIn profileJF
John Ford
Investor / AdvisorCybersecurity executive with more than 20 years of leadership across healthcare, enterprise software, and managed-service ecosystems, including service as ConnectWise CISO.
LinkedIn profileSF
Sean Foster
Investor / AdvisorOperating executive and venture advisor with more than 25 years of experience building and scaling enterprise technology and cybersecurity companies. Sean helps founders with go-to-market strategy, enterprise sales, customer retention, partnerships, and predictable revenue growth.
LinkedIn profileKL
Karl Lunney
Investor / AdvisorCo-founder of 360° Wealth & Benefits with decades of experience in financial services, employee benefits, retirement planning, and business advisory.
LinkedIn profileKM
Ken Marks
Investor / AdvisorCybersecurity and networking executive with more than 30 years of experience building global channel programs and partner-led growth across leading technology companies.
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Wes Spencer
Investor / AdvisorCybersecurity entrepreneur and MSP community leader who co-founded Perch Security and now leads Empath, a learning and workforce-development platform for MSPs.
LinkedIn profileAt an inflection point?
Let’s talk about what comes next.
If you are a founder or CEO building a technology company and considering the right partner for your next phase, we would welcome the conversation.