US Rail Groups Confirms Medeiros CAO Jones President Posts
US rail groups confirmed Jill Medeiros as SLSI CAO and Luke Jones as MARS President in January 2024.

WASHINGTON, D.C. – The Short Line Safety Institute (SLSI) has promoted Jill Medeiros to chief administrative officer, placing her in charge of federal grant lifecycle management and regulatory compliance. Separately, the Midwest Association of Rail Shippers (MARS) announced its new leadership team following its January winter meeting, electing Luke Jones of GATX Corp. as president.
What Is the Full Scope of This Development?
Jill Medeiros’s new role at SLSI encompasses compliance with the Federal Code of Regulations Part 200 and the complete management of federal grant awards, from application to closeout. At MARS, the new leadership includes President Luke Jones (GATX Corp.), First VP Monica Freeman (CHS Inc.), and Second VP Bryan Vaughan (Modern Rail Capital LLC). The MARS Executive Committee adds six new members from companies including R. J. Corman Railroad Group, Nestle Purina PetCare Co., CPKC, and Watco.
Key Development Data
| Parameter | Value |
|---|---|
| Company / Organisation | Short Line Safety Institute (SLSI); Midwest Association of Rail Shippers (MARS) |
| Total Value | Not disclosed |
| Parties Involved | Jill Medeiros (SLSI), Luke Jones (MARS), GATX Corp., CHS Inc., CPKC, Watco, Nestle Purina, Molson Coors |
| Timeline / Completion | Announced January 2024 |
| Country / Corridor | United States |
How Does This Compare to Industry Trends?
These leadership changes occur as the U.S. rail industry faces heightened regulatory scrutiny. Medeiros’s focus on federal grant compliance is particularly timely, given ongoing legislative activity aimed at strengthening nationwide rail safety, which includes proposals to increase penalties for rail companies and enhance train inspection protocols (Source: PropertyCasualty360). The diverse representation on the MARS committee, including major shippers like Nestle and Molson Coors alongside carriers like CPKC and Watco, reflects an industry-wide trend toward improving supply chain collaboration to address persistent service and efficiency challenges.
Editor’s Analysis
The appointment of a compliance-focused executive at SLSI highlights the increasing administrative burden on short line railroads, which must navigate complex federal safety and grant regulations often without the extensive resources of Class I operators. This focus on internal governance, coupled with MARS’s cross-industry leadership, suggests a proactive industry strategy to get ahead of anticipated federal mandates. This approach contrasts with trends in some passenger rail sectors, where ridership declines are being met with service adjustments like fare simplification rather than fundamental operational overhauls (Source: Axios).
FAQ
Q: What specific regulation will Jill Medeiros oversee?
A: She will be responsible for compliance with the Federal Code of Regulations Part 200, which dictates the administration, costing principles, and audit requirements for federal grant awards. Her role covers the entire grant lifecycle from application to final closeout.
Q: Who are the key new leaders at the Midwest Association of Rail Shippers (MARS)?
A: The new top officers are Luke Jones of GATX Corp. as president, Monica Freeman of CHS Inc. as first vice president, and Bryan Vaughan of Modern Rail Capital LLC as second VP. The executive committee also gained representation from major shippers and rail operators, including Nestle Purina and CPKC.
Q: What is the significance of these appointments for the U.S. rail industry?
A: These appointments signal a dual industry focus on strengthening internal safety compliance and improving shipper-carrier collaboration. SLSI is bolstering its administrative capabilities for federal programs, while MARS is fostering dialogue across the supply chain to address operational issues ahead of potential new regulations.




