Tyson’s Corner, Virginia – July 23, 2025 – growth[period], a provider of business development and transaction advisory services worldwide, today announced that Marnix (Mark) R. Koumans has joined the firm as a Strategic Client Advisor. Based out of growth[period]’s Virginia office, Mr. Koumans will draw from decades of transformational executive leadership experience in foreign and domestic security, trade, immigration policymaking, operations, and mission support at the Department of Homeland Security (DHS) – including at DHS Headquarters, U.S. Customs and Border Protection (CBP), U.S. Citizenship and Immigration Services (USCIS), the Department of State, and the Office of the U.S. Trade Representative – to advise our clients on solving complex problems.
Mr. Koumans’ extensive experience includes having served most recently as the Deputy Executive Assistant Commissioner (DEAC) for Operations Support (OS) at CBP from 2021 to 2025. Prior to that Mr. Koumans served as the Deputy Director of USCIS, as well as the Deputy Executive Assistant Commissioner (DEAC) for Enterprise Services at CBP. He also previously served as the Deputy Assistant Secretary for International Affairs at DHS and as a Foreign Service Officer at the Department of State.
Koumans joins growth[period]’s innovative Strategic Advisory Team, which offers clients experience-based, actionable, and strategic advice. growth[period] CEO, Courtney B. Spaeth, stated that “Mark adds tremendous value to growth[period] as a global organization. His experience and insights will greatly expand our expertise in the Homeland Security, customs and immigration sectors with corporate and private equity clients.” As an experienced executive, Koumans helps growth[period]’s clients develop and prioritize practical approaches and solutions suited to each client’s unique culture, circumstances, and business development needs. growth[period]’s Strategic Advisory Program supports clients at every stage, whether the client is a high-growth start-up, a late-stage company preparing for a transaction, or a multinational public company. Similarly, the program is intended to support companies ranging from those with no or limited business development resources to those with well-established growth/transaction teams. For more information, visit growth[period] at www.growthprd.com.
About growth[period]
For more than 18 years, growth[period]’s management consulting, business development, strategy and transaction advisory services have focused on serving the principal challenges faced by the federal contractors and commercial businesses hoping to enter the federal marketplace. The firm is nationally recognized as a leading provider to growing and established clients seeking assistance to complete sophisticated corporate and technology transactions; manage entry into the federal government contracting industry; assist with navigating the federal marketplace; represent them in partnering agreements; and/or advise them on diligence matters. With deep roots globally, growth[period] has more than 50 experts and offices in multiple markets across the United States, Canada, Latin America, Asia and Europe. For more information, please visit www.growthprd.com
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