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Retiree Benefit Trust of St. Mary's County (OPEB)
St. Mary's County Commissioners oversee the OPEB trust for county retirees, investing OPEB assets via Maryland's state-level pooled trusts.
Retiree Benefit Trust of St. Mary's County (OPEB)
The Retiree Benefit Trust of St. Mary's County (OPEB) is a single-employer trust fund administered by the Commissioners of St. Mary's County, a five-member elected board based in Leonardtown, Maryland. St. Mary's County established the trust to pre-fund retiree healthcare and other post-employment benefits for its workforce, a structural overlay on the county's balance sheet shaped by Governmental Accounting Standards Board reporting requirements. Component units — St. Mary's County Public Schools, the Metropolitan Commission, and the Public Library — operate parallel OPEB trusts with their own assets, though the county's own trust remains the central obligation. The trust's investment strategy is defined by its participation in Maryland's cooperative investment pools rather than by any internal asset allocation. County OPEB assets are invested in the Maryland Local Government Investment Pool (MLGIP), a state-managed short-term fund governed by Maryland's Treasurer, which holds cash, U.S. Treasury obligations and agency securities. The school system's OPEB trust directs assets into the Maryland Association of Boards of Education (MABE) Pooled OPEB Trust, while the Metropolitan Commission and the library's OPEB trusts each place their holdings with the Maryland Association of Counties (MACo) Pooled OPEB Trust. None of these vehicles discloses individual position-level holdings on a per-participant basis. The commissioners exercise oversight through the county's Department of Finance, while the component unit trusts are governed by their respective boards. The county's total OPEB liability and the trust's funded ratio are publicly reported in St. Mary's County's Annual Comprehensive Financial Report, but the trust does not separately disclose an aggregate asset figure. In May 2026, the Commissioners of St. Mary's County convened a joint meeting with Naval Air Station Patuxent River, a regular session that addresses local infrastructure coordination — underscoring the military-installation adjacency that distinguishes southern Maryland's fiscal landscape. The trust's structural differentiator is its almost complete delegation of asset management to state-level pooled trusts. Rather than hiring staff or retaining an OCIO, the county and its component units effectively outsource investment selection to the Maryland State Treasurer's Office (via MLGIP), MABE, and MACo. This architecture locks in a conservative, short-duration, fixed-income posture that is characteristic of small municipal OPEB trusts nationwide, but it also means that allocation decisions sit with the pool managers in Annapolis and Baltimore, not in Leonardtown.
General information
Firm type
Pension Fund
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Leonardtown
Corporate office
Leonardtown, MD, United States
Principals
Eric Colvin
Commissioner
James R. Guy
Commissioner
Michael L. Hewitt
Commissioner
Mike Alderson Jr.
Commissioner
Scott R. Ostrow
Commissioner
Frequently asked questions
Who makes investment decisions for the St. Mary's County OPEB Trust?
The five-member Board of County Commissioners holds fiduciary authority over the trust, with administrative support from the county's Department of Finance. Day-to-day investment management is effectively delegated to the managers of Maryland's state-sponsored investment pools — the Maryland Local Government Investment Pool (MLGIP), the Maryland Association of Counties (MACo) Pooled OPEB Trust, and the Maryland Association of Boards of Education (MABE) Pooled OPEB Trust — each of which oversees asset allocation and security selection for its participant trusts.
How are the OPEB assets of St. Mary's County component units handled?
St. Mary's County Public Schools maintains its OPEB trust assets in the MABE Pooled OPEB Trust, a separate legal vehicle managed for participating school boards across the state. The St. Mary's County Metropolitan Commission and the county's Public Library each hold their OPEB assets in the MACo Pooled OPEB Trust. None of these component unit trusts is commingled with the county's own OPEB trust, and each board governs its trust independently.
What investment vehicles does the trust use?
The county's OPEB trust invests primarily through the Maryland Local Government Investment Pool (MLGIP), a short-term investment fund managed by the Maryland State Treasurer's Office that is restricted to U.S. Treasury securities, federal agency obligations, and high-quality money-market instruments. The component unit trusts invest through the two targeted Maryland OPEB pools — the MACo Pooled OPEB Trust and the MABE Pooled OPEB Trust — which may hold longer-duration fixed-income portfolios alongside limited equity exposure, though the exact asset mixes are determined by the pool managers, not by the county.
Does the trust make direct investments or fund commitments?
No. The Retiree Benefit Trust of St. Mary's County does not engage in direct private investments, fund commitments, or co-investments. All investable assets are funneled through Maryland's cooperative investment pools, a structure shared by many of the state's small municipal OPEB trusts. The trust's board has no in-house investment team and does not issue RFPs for external managers outside the established state pools.
Where does the trust's funding originate?
The trust is funded through annual required contributions from St. Mary's County's general fund, supplemented by state and federal grants where applicable, and by investment earnings retained within the trust. The county's actuarially determined contribution is calculated by an external actuary every two years and disclosed in the Annual Comprehensive Financial Report, alongside the OPEB liability and the trust's funded ratio.
Are the trust's assets commingled with the county's pension fund?
No. St. Mary's County operates a separate pension plan for its employees, which is not part of the OPEB trust and is managed under a different set of fiduciary arrangements. The OPEB trust is a single-purpose irrevocable trust established solely to pre-fund retiree health and other post-employment benefits, and its assets cannot be used for pension obligations or general county operations.
What is the trust's relationship with the Maryland State Treasury?
The trust's primary investment vehicle, the Maryland Local Government Investment Pool (MLGIP), is an instrument of the Maryland State Treasury. The State Treasurer administers the pool under statutory authority, and participant units — including St. Mary's County — hold shares in the pool rather than direct securities. The pool's portfolio composition and yield are publicly reported by the Treasury, but individual participant balances are not individually disclosed by the state for competitive and privacy reasons.
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