The Valens Team

 
Daveed Gartenstein-Ross
Daveed Gartenstein-Ross
Marielle Costanza
Marielle Costanza
Nathaniel Barr
Nathaniel Barr
 
Cassandra McClellan
Cassandra McClellan
Vivian Hagerty
Vivian Hagerty
Madeleine Blackman
Madeleine Blackman
Al-Husein Madhany
Al-Husein Madhany
Jacob Zenn
Jacob Zenn
Tara Vassefi
Tara Vassefi
Donté Stallworth
Donté Stallworth
Valens Team

DR. DAVEED GARTENSTEIN-ROSS

CHIEF EXECUTIVE OFFICER  

Daveed Gartenstein-Ross is the Chief Executive Officer of Valens Global. His professional focus is on understanding how violent non-state actors (VNSAs) are transforming the world, and how states are in turn trying to adapt to this challenge. Gartenstein-Ross has specialized in jihadist movements, including undertaking detailed research into al-Qaeda, the Islamic State (ISIS), Ansar al-Sharia in Tunisia, Boko Haram, and ISIS’s Wilayat Sinai. He is also a Senior Fellow at the Foundation for Defense of Democracies, as well as a Fellow with Google’s Jigsaw, an Associate Fellow at the International Centre for Counter-Terrorism – The Hague, and an Adjunct Assistant Professor in Georgetown University’s Security Studies Program.

Known for his rigorous scholarship, and also putting ideas into action as a practitioner, Gartenstein-Ross is the author or volume editor of twenty-one books and monographs. He has published widely in the popular and academic press, including in The New York Times, The Washington Post, Foreign Affairs, Foreign Policy, The Atlantic, and Terrorism & Political Violence. He is also a member of the Editorial Board of the leading peer-reviewed journal Studies in Conflict & Terrorism. As a practitioner, some of Gartenstein-Ross’s recent projects have included:

  • delivering regular briefings and assessments to U.S. government agencies on such topics as ISIS’s European attack network, the implications of the failed coup in Turkey on counterterrorism efforts, and the strategic implications of the Libyan civil war;
  • organizing and facilitating a conference in Nigeria, as an EU-appointed Strategic Communication Expert, helping civil society activists understand militant groups’ use of social media and forge a strategic action plan for countering it;
  • mapping the online counter-ISIS narrative space for a leading tech firm designing a pilot project to divert users who may be susceptible to the jihadist group’s propaganda;
  • producing reports for major oil and gas firms interested in protecting their investments and personnel on the capabilities and future trajectory of militant groups based in Africa;
  • serving as a subject-matter consultant on militant groups during live hostage negotiations;
  • designing and delivering lectures and training for U.S. government personnel through such programs as the U.S. Army Corps of Engineer’s Individual Terrorism Awareness Course and the Naval Postgraduate School’s Leader Development and Education for Sustained Peace (LDESP) program;
  • designing and leading strategic simulations exploring the competition between VNSAs and state actors for major academic institutions such as Johns Hopkins University.

Gartenstein-Ross has testified on his areas of core competency before the U.S. House and Senate a dozen times, as well as before the Canadian House of Commons. He has also served as an expert witness in seven asylum cases. He is frequently a featured speaker at events and conferences throughout the globe, including delivering keynote speeches at the U.S. Army Special Operations Command Commander’s Conference, the University of Southern California’s National Center for Risk and Economic Analysis of Terrorism Events (CREATE), and the Global Futures Forum. Other venues where Gartenstein-Ross has spoken include the Royal United Services Institute (London), the Kazakhstan Institute for Strategic Studies (Kazakhstan), Uppsala University (Sweden), the National Defence College (Abu Dhabi), the North Atlantic Treaty Organization (NATO), the Minerva Research Initiative, and the Pulitzer Center on Crisis Reporting.

Gartenstein-Ross holds a Ph.D. in world politics from the Catholic University of America and a J.D. from the New York University School of Law. He can conduct research in five languages.

His e-mail address is daveed@valensglobal.com, and he is active on Twitter as @DaveedGR.

Marielle Costanza

MARIELLE COSTANZA

SENIOR VICE PRESIDENT 

Marielle Costanza is the Senior Vice President of Valens Global. At Valens, Marielle leads business development and supports company-wide research and analysis. Before joining Valens, Marielle led business development at several national non-profits including Young Invincibles and the American-Arab Anti-Discrimination Committee. Additionally, she was a researcher at both the Washington Institute for Near East Policy and the Foundation for the Defense of Democracies, focusing on counter-terrorism, radicalization, sectarianism, political instability and democracy in the Middle East. Marielle worked as a consultant for V1 Analytical Solutions, providing in-depth analysis for country-specific economic and political threats. She has a Masters degree from Harvard University in Middle Eastern Studies, and graduated magna cum laude from the University of Utah with degrees in History, International Studies, Middle Eastern Studies and a minor in Arabic. Marielle is fluent in Arabic and skilled in Farsi.

Nathaniel Barr

NATHANIEL BARR

RESEARCH MANAGER 

Nathaniel Barr is the research manager at Valens Global. He specializes in the study of salafi jihadist groups in North Africa and the Middle East, with a specific focus on the dynamics of the global competition between al-Qaeda and the Islamic State. He has also done extensive research on domestic jihadist networks in the West, combating jihadist propaganda, and other issues relating to countering violent extremism (CVE).  

Nathaniel has co-authored six full-length monographs, and has also been published in several mainstream publications, including Foreign Affairs, the Daily Beast and Foreign Policy. He is a graduate of Brandeis, holding a degree in political science and a minor in journalism.

Cassandra McClellan

CASSANDRA MCCLELLAN

STRATEGY ASSOCIATE 

Cassandra McClellan is a Strategy Associate at Valens Global. In this role, she identifies opportunities and key partners and assists with general operations and project development. Cassandra also plays a critical research role providing analysis on foreign fighters, the persistence of the Taliban in Afghanistan, Pakistani national security, jihadi social media, domestic radicalization, and other related topics. In addition to strategic development work, she collaborates on Valens research products such as a memo on the Islamic State’s use of Islamic law, a report on Ansar Bayt al-Maqdis, threat assessments and travel advisories focused on Kashmir and the Eastern Province of Saudi Arabia, and U.S. Congressional Testimony on the Islamic State’s messaging capabilities and the potential threat to the homeland from admitting Syrian refugees. She has been interviewed by BBC Radio on the network connections between the Paris and Brussels attacks, and was recently profiled by WWP News about her time in the Middle East and work in the field. 

Cassandra has lived in Amman, Jordan, and traveled throughout the region. She is conversationally fluent in Spanish and conversant in Arabic. A cum laude graduate of Elon University, Cassandra holds dual degrees in Political Science and International Studies, with concentrations in Middle Eastern Studies and Peace and Conflict Studies. 

Vivian Hagerty

VIVIAN HAGERTY

ANALYST 

Vivian Hagerty is an analyst at Valens Global. In collaboration with Valens’ research team, Vivian works to provide innovative analysis and research on today’s most pressing security challenges. She specializes in violent non-state actors (VNSAs) in South Asia, as well as the relationships VNSAs form with one another globally. Being particularly interested in when and how these relationships fall apart, she has published on “terrorist divorce” and the ISIL/al-Qaeda split. In addition, Vivian has previous experience in government and NGOs, as well as language skills in French, German, and Turkish.

Vivian graduated magna cum laude from American University and is completing her Master’s degree in Security Studies at Georgetown University. As an undergrad, she majored in Homeland and National Security Studies with a concentration in terrorism and intelligence. She currently focuses on U.S. National Security Policy in Georgetown’s Security Studies Program.

 
Madeleine Blackman

MADELEINE BLACKMAN

ANALYST

Madeleine Blackman is an analyst at Valens Global, specializing in emerging threats within the MENA region. She supports the research team with projects concerning a range of issues related to violent non-state actors and their diverse theaters of operation.

Madeleine graduated cum laude from Georgetown University with dual degrees in government and psychology. She completed an honors thesis, to be published by the Journal of Peace Psychology in 2017, which examined correlations between personality traits and attraction to specific types of extremist propaganda. She worked for two years as a research assistant at Georgetown, focusing extensively on radicalization and issues related to countering violent extremism. Madeleine authored two entries in the Encyclopedia of Political Behavior, to be published by Sage Communications in 2017, and she coauthored a chapter entitled “Globalization and Terrorism: The Primacy of Collective Processes” in the 2nd edition of The Social Psychology of Good and Evil. Most recently she coauthored an article published in Terrorism Monitor with Nate Barr.

Al-Husein Madhany

AL-HUSEIN MADHANY

ADVISOR 

Al-Husein Madhany, who serves as an Advisor at Valens Global, is a consummate connector and facilitator for diplomatic action.

Al-Husein currently reports to the Facebook CIO and serves as his executive business partner. Previously, he was the Executive Vice President of the One Nation Foundation based in Gig Harbor, Washington. Prior to moving out West, Al-Husein taught Arabic at Georgetown University and has published with the Brookings Institution on Islam, Muslim societies, and Social Media.

Al-Husein holds a BA from Wake Forest University and advanced degrees from Harvard, Georgetown, and the University of Chicago. He is a member of the Pacific Council on International Policy, was recently an Aspen Ideas Scholar, and has been a term member of the Council on Foreign Relations.

Al-Husein serves as a Senior Advisor Patheos.com (http://www.patheos.com/), the premier online destination to explore and experience the world’s beliefs. He also is Senior Consultant at the Duncan Group (http://www.duncangroupinc.com/), and offers expertise in four practice areas: recruitment, organizational consulting, coaching, and executive-level training for professional support staff.

Al-Husein lives in Silicon Valley with his wife and two children, where he enjoys running and teaching at the University of California, Silicon Valley extension campus. You can follow Al-Husein at https://www.facebook.com/alhusein.madhany.

Jacob Zenn

JACOB ZENN

SENIOR CONSULTANT

Jacob Zenn is a Senior Consultant at Valens Global. He was component leader under European Union Technical Assistance to Nigeria’s Evolving Security Challenges (EUTANS) from 2014 to May 2016, and supported a CT Sahel project in Niger as part of the Instrument for Stability (IfS) of the EU. In 2015-2016 he provided analyses of Boko Haram’s organizational structure to the Swiss Embassy in Abuja, which supported negotiations that led to the release of 21 Chibok schoolgirls in October 2016. He is now on a consultant team as part of the Nigeria Stability and Reconciliation Programme (NSRP) drafting a Nigeria Policy Framework and National Action Plan on countering violent extremism (CVE) in Nigeria.

Zenn is a fellow on African and Eurasian Affairs at The Jamestown Foundation in Washington DC and a non-resident fellow at two think-tanks in Astana, Kazakhstan (Center for Security Programs) and Shanghai, China (Center of Shanghai Cooperation Organization Studies). Zenn is the author of more than 200 reports and articles on Nigeria, Central Asia and Southeast Asia and has spoken and published widely in the academic and popular press.

Zenn consults for clients who need to understand micro-level details about leadership, ideology, strategic communication, and operational trends of violent non-state actors (VNSAs)—and particularly those on the “geopolitical periphery” of the Middle East—as well as macro-level trends about how VNSAs in the 21st century are evolving in geographical, socio-cultural and historical context. He has provided briefings and lectures for a range of international actors, including United States Army, United Nations Counter-terrorism Executive Directorate, Canadian Special Forces, and UK Ministry of Defense, and he co-teaches a graduate-level course on VNSAs as an adjunct assistant professor in Georgetown University’s Security Studies Program. He has provided expert testimony to the U.S. Congress two times on Boko Haram and one time on Central Asian militancy.

Zenn holds a J.D. from Georgetown University Law Center, where he was a Global Law Scholar, and a Graduate Certificate in Chinese and American Affairs from Johns Hopkins SAIS-Nanjing University School of Advanced International Studies, where courses were taught in Mandarin. Zenn conducts research in more than 10 languages.

Jacob Zenn

TARA VASSEFI

SPECIAL ADVISOR

Tara Vassefi is a Special Advisor to Valens Global. At Valens, Tara supports business development, builds strategic partnerships, and provides expertise and input to company-wide research and analysis. Tara has had a range of experience from the government, non-profit, and private sectors. Tara started her career as Daveed Gartenstein-Ross’ research analyst focusing on terrorism, radicalization, and violent non-state actors. She went on to work in government for five years with the Leader Development and Education for Sustained Peace (LDESP) program where her responsibilities included everything from research and curriculum development to government contract writing and the bid-review process.

She was awarded the 2016 JD Distinguished Fellowship and is now a legal fellow working on MENA jurisprudence with the Video as Evidence Program at WITNESS, a human rights organization that collaborates with activists, human rights lawyers and international justice organizations to enhance the evidentiary value of video captured in the field. She is also a legal fellow with the Public Interest Law Network (PILnet).

She graduated cum laude from the American University Washington College of Law, received an M.A. in International Relations with Middle Eastern Studies from the University of St Andrews, and studied Arabic at Damascus University and the American University of Cairo. Tara is fluent in Farsi and skilled in French and Arabic.

Jacob Zenn

DONTÉ STALLWORTH

STRATEGY CONSULTANT 

Donté Stallworth joined the Valens Global team in 2016 where he focuses on crisis architecture, which helps secure and harden public venues against terror attacks.  He is a former professional football player who had an illustrious career as a wide receiver in the NFL after being drafted by the New Orleans Saints in the first round of the 2002 NFL Draft. Donté transitioned from the playing field to the field of journalism, completing a fellowship with the Huffington Post where he covered national security. Donté currently resides in DC where he continues his work in journalism as well as an NFL analyst.