Dice Holdings is the private operating platform behind this work — $2B+ in cumulative asset value across digital infrastructure, real assets, and maritime. IRONCLAD is the lead mandate today: hardened, single-tenant AI infrastructure for enterprise, defense, and allied sovereign programs. Sovereign marina development runs alongside it; a regulated capital-markets platform was built and sold in December 2025.
Hardened AI infrastructure · owned & operated
Hardened, relocatable, single-tenant compute modules for enterprise AI, defense, and sovereign programs.
Read more ↓ Division / 02Concessions · 8 prior marinas to Blackstone / IGY
Sovereign-level marina and utility concessions in island jurisdictions. Customs, port-of-entry, independent utilities, lender step-in.
View portfolio →Ironclad builds and operates hardened, relocatable compute modules — optionally self-powered — for enterprises and research institutions training advanced AI, for federal, defense, and allied sovereign programs, and as the command center for unmanned and autonomous fleets. Single-tenant and physically isolated, factory-integrated and tested in the United States, delivered as equipment on a pad rather than a construction program — run to the same zero-fail discipline that governs every asset in this portfolio.
Welded steel, HEMP shielded, built to classified-facility construction standards — equipment on a pad, not a building.
Ironclad manages deployment, monitoring, and lifecycle operations end to end. You run the mission — we run the facility.
Optionally self-powered — Ironclad-owned generation on a skid, N+1, with the grid on standby.
Compute and command infrastructure delivered as a subcontractor under a prime’s existing contract vehicle.
The hardened, powered, networked command center for unmanned and autonomous fleets — sited where systems are built and flown.
Reserved capacity on take-or-pay, data residency pinned by data class, asset sited in-country under host law.
Single-tenant, physically isolated infrastructure for sensitive, export-controlled, or regulated workloads.
Ironclad partners with the organizations that control strategic resources — land, power, energy assets, and research ecosystems — to develop and operate AI infrastructure platforms on them.
Modular AI infrastructure platforms developed, deployed, and operated with universities and research institutions.
Behind-the-meter generation and surplus power converted into revenue-generating compute infrastructure.
Deployment where power, land, and operations already exist — no interconnection queue gating the schedule.
SEC/FINRA-registered ATS for tokenization, real-time settlement, and collateral optimization. Built and scaled the regulated digital-asset securities platform from inception through strategic acquisition. Managed CXO-level relationships across banking and broker-dealer ecosystems in multi-jurisdictional environments. Coordinated cross-functional teams across operations, engineering, and compliance through SEC and FINRA registration.
Dennis Close spent a decade in the U.S. Navy's submarine fleet, qualifying aboard SSBN ballistic-missile submarines and standing eight strategic deterrent patrols in the Atlantic Fleet. He held Top Secret / SCI clearance as an Intelligence Custodian, directed a Sub-Safe program to a zero-deficiency record, and managed multimillion-dollar refit budgets — a standard of zero-fail discipline under sustained operational pressure that has defined every venture since.
Two decades building and operating companies followed, in marine manufacturing and superyacht services — work he remains active in today — alongside founding Dice Holdings, the family-office platform that now operates across digital infrastructure and sovereign marina development.
Today that trajectory runs through IRONCLAD, where the same standard that ran a submarine runs a compute facility — owned and operated infrastructure, built to a zero-fail standard, with no dependency on any third party.
Qualified Submariner aboard USS Maryland (SSBN-738), USS Kentucky (SSBN-737), and USS West Virginia (SSBN-736) — eight strategic deterrent patrols.
Zero deficiencies across a two-year tenure.
$15M repair budgets · $1M+ documented taxpayer savings.
Two Navy Commendation Medals · Sailor of the Year, twice.