Dice Holdings is a private, family-office-style operating platform. $2B+ in cumulative asset value across digital infrastructure, real asset, and maritime divisions. Three active books today — IRONCLAD, sovereign marina development, and the residue of a strategic fintech exit.
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.
Dedicated GPU infrastructure · owned & operated
Single-tenant NVIDIA H200 clusters, deployed and operated for enterprise AI workloads.
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 deploys and operates single-tenant NVIDIA H200 clusters for enterprises building advanced AI — dedicated, physically isolated capacity, run to the same zero-fail discipline as everything else in this portfolio. Modular 1 MW and 2 MW infrastructure, sized to the workload rather than the datacenter.
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.
Private family-office operating platform. $2B+ in cumulative asset value across digital infrastructure, real asset, and maritime divisions. Originally founded as Freedom Marine Group (2012); rolled into Technomarine Group and consolidated under Dice Holdings in 2015. Active books today: IRONCLAD and sovereign marina development.
Operating and sales leadership across four organizations — Brunswick / Cabo Yachts, Rybovich Superyacht Marina & Refit, Release Boatworks, and Tribute Boats — spanning new construction, refit, and dealer networks. Continued marina advisory and yacht brokerage work since. Full detail on the Marinas & Yachts page.
Qualified Submariner. USS Maryland SSBN-738, USS Kentucky SSBN-737, USS West Virginia SSBN-736. Eight strategic deterrent patrols. Former Top Secret / SCI clearance and Intelligence Custodian. Sub-Safe Program Director (zero deficiencies, two-year tenure). Refit Project Manager — $15M repair budgets, $1M+ documented taxpayer savings. STA-21 selectee — 1 of 273 from 3,800 applicants. Two Navy Commendation Medals; USS Kentucky Sailor of the Year (twice).