M&R Strategic Services (MRSS) is a Washington, D.C.-based government relations and consulting company that primarily caters to left-of-center clients. The firm was founded by Donald Ross, ex-director of the New York Public Interest Group (NYPIRG) and founder of NEO Philanthropy, and Arthur N. Malkin, a former NYPIRG staffer who worked under Ross’s tenure in the early 1980s.
MRSS is affiliated with Malkin & Ross, an Albany, New York-based lobbying and government affairs firm created by Donald Ross and Arthur Malkin in 1984. Malkin & Ross lists clients including Food and Water Watch, Vera Institute of Justice, Sierra Club, and Make the Road New York; it’s first large client was reportedly the New York Trial Lawyers Association.   
MRSS notes campaigns and left-wing groups it’s consulted for, including People for the Ethical Treatment of Animals (PETA), Union of Concerned Scientists (UCS), Sierra Club, GLAAD, Center on Budget and Policy Priorities, Population Connection, Oxfam America, Planned Parenthood, 350.org, and Earthrights International.  The group also opposed the Trump administration’s decision to undo the creation of several national parks in the final weeks of the Obama administration. 
Past MRSS clients also include AARP, Alliance for Justice, Bread for the World, Environmental Defense Fund, Human Rights Campaign, NARAL Pro-Choice America, League of Conservation Voters, National Environmental Trust, the Bauman Family Foundation, the Hewlett Foundation, the Service Employees International Union (SEIU), and Public Interest Projects (NEO Philanthropy). 
In 2018, the Packard Foundation reported a $50,000 grant to MRSS “for public opinion polling and other research on views of science”; in 2018 it reported another $150,000 grant to the firm for the same purpose.  
2018 Midterm Elections
In the 2018 midterm election, MRSS received $1,335,417 in payments from left-wing PACs and labor unions, including Planned Parenthood Votes, the SEIU, League of Conservation Voters, Win Justice PAC, United We Can, American Nurses Association, and It Starts Today. 
Also see NEO Philanthropy (Nonprofit)
NEO Philanthropy has hired M+R Strategic Services (MRSS), the firm co-founded by NEO Philanthropy founder Donald Ross, for “project management” services at least twice. In 2013, NEO paid MRSS $5,257,000.  In 2014, NEO paid MRSS $3,992,498.  According to a 2012 NEO report, the group hired MRSS “to help design, staff and manage state campaigns” for its project National Campaign to Reform State Juvenile Justice Systems.