More than a decade of experience as a contractor to Industry, the US federal government, states and local agencies.

Incorporated in 1998, the Seneca Group is a business consulting firm serving public and private clients in the global transportation industry. Our team offers a unique combination of hands-on operating experience, an expert understanding of transportation law and financing and significant experience in relating business issues to the governmental process.

We have specific expertise in the areas where the public and private sectors intersect, such as with government-funded projects. We have prepared and analyzed applications for federal grants and loans up to several hundred million dollars in value. The firm has performed financial and benefit-cost analyses for a range of transportation project types. Many of our projects have involved different aspects of policy development and regulatory compliance. Our firm has a niche expertise in rolling stock, with a specialty in motive power propulsion systems and controls. We have participated in research and pilot projects in the areas of sensors, propulsion and energy efficiency. Seneca has also performed traditional market assessments for firms in the railway operations and supply sectors, and supported companies’ product development, market entry and acquisition strategies.

Seneca has more than a decade of experience as a contractor to the US federal government, states, and local agencies. Internationally we have worked for both individual foreign governments and multilateral organizations.

Seneca has a sister company, Chambers, Conlon & Hartwell, LLC, a leading Washington government relations and advocacy firm that has been in business for more than 30 years.

Our Team

Seneca’s expert professional consultants have extensive hands-on experience in roles such as executive management, accounting and finance, marketing, engineering, and government affairs. They have supported acquisitions and restructuring, helped develop new railway technology, and negotiated commercial contracts, mergers, and acquisitions. They have gained this experience while working for a diverse array of transportation systems around the world. Seneca’s experienced analysts and project managers support these expert consultants. Our firm can assemble multi-disciplinary teams on short notice, capable of addressing a very wide range of engagements.

David Tennent, P.E.

David Tennent, P.E.


Dave Tennent joined CC&H as a partner in 2012 after working as a Principal since 2005 with CC&H’s sister firm, the Seneca Group. Mr. Tennent has 35 years of experience in the railroad industry beginning as a front-line supervisor in the Norfolk and Western’s locomotive shops following his receipt of a Mechanical Engineering degree from the University of Delaware. Mr. Tennent’s career encompasses assignments with railroad companies, rolling stock manufacturers, government financial institutions, public transportation authorities, and international state-owned railways as well as owning and running his own small engineering and manufacturing firm. This has provided him with a unique understanding of the technical and managerial issues associated with the procurement, design, maintenance, and operation of railway rolling stock and the role of government entities in this sector of the industry.

In addition to a stable sequence of technical and engineering assignments, Mr. Tennent participated in projects involving project administration and management insight while a Principal with the Seneca Group. These included assisting the Egyptian National Railways in a locomotive procurement, developing a locomotive fleet and maintenance plan for the State Railways of Azerbaijan, assisting a major domestic locomotive manufacturer in the development and structure of their engineering department as well as providing direction with their major transit contracts, and coordinating the activities between the train operating companies and the Australian Rail Track Corporation for the Lockheed Martin positive train control system being developed in Australia. Mr. Tennent also recently authored two successful TIGER grants, one in 2014 and one in 2015. He was a member of a successful TIGER team for a grant award in 2013. As part of his partnership activities with CC&H, Mr. Tennent is the Executive Director of the Railway Engineering-Maintenance Suppliers Association (REMSA).

Prior to joining the Seneca Group, Mr. Tennent was the President and founder of Diesel Power and Controls, a fifteen-employee firm designing and manufacturing electrical control systems for locomotives, transit cars, and railroad work equipment. Mr. Tennent’s customers included Amtrak, New York State Department of Transportation, New York City Transit Authority, Toronto Transit Commission, and others. During this time Mr. Tennent also performed numerous consulting assignments including locomotive procurement for the Panama Canal Commission, privatization of locomotive maintenance for the State Railways of Thailand, and a positive train control feasibility study for the Romanian National Railways. In the earlier part of his career, Mr. Tennent achieved the position of Assistant Superintendent – Locomotive with the Norfolk Southern railroad and was responsible for 210 locomotives and 115 employees at the Bellevue, Ohio locomotive shop. Following his work with Norfolk Southern and prior to starting Diesel Power and Controls, Mr. Tennent was also Vice President – Manufacturing for Republic Locomotive and was responsible for the operation of the company and its 150 employees.

Mr. Tennent has a Bachelor of Mechanical Engineering degree and is a licensed Professional Engineer.

richard sherman

richard sherman

Project Director/Senior Analyst

Richard Sherman has been with CC&H and its affiliated companies since 1999. He is a Senior Associate and his areas of expertise include transportation sector and not-for-profit sector government relations, project management and railway and transport business, market, policy and institutional analyses. He has several years of experience preparing applications for federal assistance for infrastructure capital projects including through the U.S. DOT’s National Infrastructure Investments  (TIGER/BUILD), CMAQ, INFRA and CRISI grant programs, as well as the Railway Rehabilitation and Improvement Finance (RRIF) loan program. He has secured more than $45 million in federal grant funding for clients across eight separate awards. He has provided regulatory and contract compliance support to railroad and rail supply sector clients, including for U.S. DOT’s Buy America program and federal and industry rolling stock materials performance standards.

Mr. Sherman has performed several scoping and due diligence projects for U.S. government-financed international trade promotion activities in different infrastructure sectors. He has worked as a team member on several overseas projects involving organizational and financial restructuring of major railway and natural resource enterprises, financed variously by national governments, private companies and multilateral lending institutions such as the World Bank and the European Bank for Reconstruction and Development.

 Mr. Sherman has been a key team member in several market assessment projects for transportation industry supply sector clients. He has performed policy research, analysis and writing in areas ranging from federal funding to safety regulation to labor issues.

As a member of the U.S. Army Reserve he led a tactical psychological operations team in Baghdad, Iraq in 2006-2007.

Mr. Sherman holds a B.A. in International Affairs from the George Washington University and a Master’s Degree in Public Policy, with a concentration in public financial management, from American University. He earned a Graduate Certificate in Spanish Translation from American University in 2019.  He received CAPM certification from the Project Management Institute in 2009.