About Us

Miguel Pagan is the Assistant Vice President of Administrative Services, charged with the leadership of Columbia Mail, Columbia Print and Columbia Transportation. Mike provides strategic and operational oversight to these departments, with a focus on customer service, operational efficiency, and sustainable solutions.

Since joining the University in 2004, Mike has led the organization with his significant operational experience and expertise. He spent nearly two decades in healthcare administration, first in a staff position at Mt. Sinai Hospital and rising to Corporate Director of Materials Management at St. Luke’s-Roosevelt Hospital.

Jimmy Lai is the Manager of Operations for Administrative Services, Manhattanville. Jimmy acts as a liaison between the Manhattanville campus and Mail and Transportation operations. This is a critical position managing the logistics of services for our growing campus community there, ensuring schools and departments have a single point of contact and access to the support needed.  

Jimmy is a well-respected member of the Columbia community, having served within Public Safety since 2018 in an administrative and planning leadership role.

Greg Rivas is the Executive Director of Administrative Services, responsible for strategic direction, planning and execution across Columbia Mail and Transportation. In this role, he oversees the technology systems utilized by Administrative Services, acts as the financial steward for department operations, and serves as the senior relationship manager with service contractors. He also works closely with the departments and schools who utilize our services, ensuring operations are customer-focused and seeking new opportunities to evolve the portfolio.  

Greg's previous role was at NYU, where he served as the Director of Transportation Services since 2014. He holds a BS in Business Administration from Fordham, as well as two Masters degrees in Transportation Planning and Urban Planning from NYU. 

David Ramos is responsible for overseeing the daily operation of the shuttles system, including regular monitoring of the shuttles along their routes. David performs routine spot checks to verify and ensure quality service. He also manages rider customer service, responding to individual concerns and questions sent via email or phone.

David joined Columbia in 2006 after serving as an Operating Room Tech Coordinator at St. Luke’s Hospital.

Daniel Allalemdjian is the Director of Sustainability and Transportation in the Office of Sustainability at Columbia University. He joined Columbia in 2014 and now his role encompasses multiple topics that support Columbia’s sustainability goals.

Daniel manages the University’s campus engagement strategies for sustainability. This includes establishing and maintaining initiatives at multiple layers of the University to spur action to decrease greenhouse gas (GHG) emissions. Specifically, his focus is on decreasing Scope 3 emissions sources such as business travel, supply chain, waste, and commute travel. Daniel is also responsible for supporting Columbia’s “Campus As a Living Lab” initiative that connects Columbia students to work on in-house, real-world challenges that will enhance their Columbia experience and act as a learning opportunity – resulting in a mutual benefit. Daniel is often a client to the undergraduate Sustainability Development capstone classes, as well as manages student interns.

Daniel’s role also includes managing and growing the University's Transportation Demand Management (TDM) initiatives that reduce GHG emissions and congestion associated with commute travel to and from the University. These initiatives have been centralized on Columbia’s Transportation website.

Daniel is also responsible for overseeing the transition of Columbia’s owned and contracted vehicle fleet to zero emissions to meet Columbia’s sustainability targets. Most notably, in 2018, Columbia transitioned its intercampus bus fleet to all-electric buses, which were among the first to operate in New York City.

Daniel leads Columbia’s sustainability planning efforts for transportation, serving as the Chair of Columbia's Transportation Working Group. This group brings together key staff, expert faculty, and students to plan how to improve campus access and support sustainable transportation design that maintains Columbia as a leader in transportation. Daniel and the working group have established GHG inventories and targets to support Columbia’s sustainability plan, Plan 2030.  

Under Daniel’s leadership, Columbia has received multiple transportation awards from industry organizations including Best Workplace for Commuters, The Association for Commuter Transportation, and The Association for the Advancement of Sustainability in Higher Education.

In Daniel’s time before Columbia, he worked as a TDM consultant at URS, now AECOM, in Boston, and as a stakeholder and community engagement consultant at Parsons Brinckerhoff, now WSP in Brisbane, Australia.

Daniel holds a Bachelor of Science in Environment from Griffith University, Australia, is a TDM Certified Professional, and is currently a candidate for a Master of Science in Sustainability Management at Columbia University.

Daniel is a transportation enthusiast, a “commute doctor,” and loves topography maps. In his job, Daniel genuinely enjoys building relationships with his University and professional peers, and thinking big picture.