Leadership
Evidence of
operational excellence.
A fund is only as credible as the people who run its buildings, control its books, and answer its residents. Here are ours.
Founder
Lawrence "Larry"
Macarty Eyeson
Founder, Mavinstone Onyx LLC
Born in Ghana and raised in the vibrant city of Philadelphia, Larry brings a rare combination of cultural depth and urban tenacity to real estate. The journey from West Africa to the East Coast instilled a durable appreciation for three things: opportunity, community, and resilience.
A lifelong entrepreneur, he has spent decades building businesses centered on real estate development, investment, and community revitalization. The mission has never wavered — transform underutilized spaces into thriving environments, and create lasting value for families, investors, and neighborhoods alike.
Through Mavinstone Onyx LLC he continues to champion smart growth, equitable housing, and impactful investment, particularly in Opportunity Zones and economically distressed areas, with a vision rooted in integrity, innovation, and legacy-building.
Beyond the boardroom he is a devoted Philadelphia Eagles supporter — a fan who wears green with pride and brings the same loyalty and grit to his business ventures that he brings to his team.
Opportunity, community, resilience. Three lessons from one passage — and the whole basis of a firm.
The operating team
Stewardship, staffed.
01
Tonya Hopkins
Chief of Staff
Mavinstone Companies & Macarty Eyeson Global Family Office
The connective tissue between leadership, teams, contractors, and partners.
Tonya serves as Chief of Staff for Macarty Eyeson Global Family Office LLC and the Mavinstone Companies, providing executive support across the family of companies. She coordinates day-to-day operations, manages strategic initiatives, oversees administrative functions, and keeps projects moving efficiently from concept to completion.
A graduate of Woodrow Wilson High School, she brings years of hands-on experience to the role. Work as a private caretaker developed exceptional organizational skill, discretion, and attention to detail; extensive experience in landscape design added a practical, solution-oriented willingness to solve problems in the field as readily as behind the scenes.
A resident of Oak Level, Virginia, she spends her time with family and at Giggling Creek Cottage. Her dedication, reliability, and consistently positive attitude make her indispensable to how the companies operate.
02
Timothy DeLonghi
Risk Management Officer
Liaison to Antstone LLC
An operations-first mindset applied to every property in the portfolio.
A Miami native raised in South Florida, Timothy developed an early appreciation for the role housing plays in building stable communities — an interest that became the foundation of his career.
He attended the University of Miami, focusing his studies on real estate and sharpening his understanding of asset performance, tenant operations, and long-term portfolio strategy. His professional work has centered on property management systems, process improvement, and risk mitigation, ensuring properties are run with consistency, accountability, and strong resident outcomes.
Today he serves as liaison to Antstone LLC, connecting leadership objectives to day-to-day execution, and is responsible for firm-wide risk management and internal controls — supporting operational integrity through structured oversight, compliance-driven practice, and proactive problem-solving.
03
Kaylyn Rouse
Quality Control Manager
Antstone LLC
The standard a resident actually experiences on move-in day.
Kaylyn ensures that Antstone's rental properties — and those of the investors it serves — consistently meet the standard residents expect. Her focus is the tenant experience: conducting property inspections, identifying maintenance concerns, and verifying that every home is genuinely move-in ready.
Her attention to detail and proactive approach maintain the standards that define our communities, reflecting Antstone's commitment to quality, safety, and professionalism.
She is currently enrolled to sit for her Virginia Real Estate licensing examination. Once licensed, she will further extend her ability to serve tenants and property owners as Antstone and its affiliates continue to grow.
04
Jennifer Jones
Controller
Antstone LLC
The financial foundation beneath a growing portfolio.
Jennifer oversees financial operations for Antstone LLC, ensuring accurate records, strong financial controls, and timely reporting across the portfolio. She manages expense categorization, accounts payable and receivable, and reconciliations, and supports leadership with budgeting and operational reporting that informs decision-making.
Working closely with property management, maintenance, and executive teams, she ensures vendor payments, tenant accounting, and company finances are handled with precision and professionalism.
As Controller she also improves internal processes, maintains financial compliance, and supports the strategic goals of the Mavinstone Companies — the discipline that lets the firm expand throughout Virginia without loosening its grip.
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