1990s

Marchick started his service in the Clinton Administration In 1993, Marchick became the deputy director of presidential correspondence.^[14] Marchick joined the Office of the United States Trade Representative in early 1993.^[15] In May 1996, Marchick was appointed by United States Secretary of Commerce Mickey Kantor to being deputy assistant secretary for trade development.^[16][17]

By January 1998, Marchick held the position of Deputy United States Assistant Secretary of State.^[18][19] Marchick led negotiations with China to expand air passenger and cargo services between the United States and China.^[20][21]

In October 1999, Marchick left the U.S. State Department to join the newly formed Bid4Assets, a website for bankrupt businesses to auction off their assets.^{[22][23][24][25]}

2000s

In March 2002, Marchick joined Covington & Burling, an international law firm.^[26] At Covington, Marchick began work on international transportation and trade issues.^[26] In September 2003, Covington formed a business alliance with Kissinger-McLarty Associates.^[27] In 2006, Marchick co-authored the book, U.S. National Security and Foreign Direct Investment,^[28] and focused his law practice on representing companies, such as IBM,^[29] seeking approval from the Committee on Foreign Investment in the United States (CFIUS), an inter-agency committee of the United States Government that reviews the national security implications of foreign investments in U.S. companies or operations.^[30]

Marchick served vice chair of Covington & Burling's international practice^[31]

In October 2007, Marchick joined The Carlyle Group, a Washington, D.C. based global asset management firm specializing in private equity. Marchick was hired for the newly created position of managing director of Carlyle's regulatory affairs.^[2] As a managing director, Marchick was responsible for regulatory issues in countries where Carlyle operates.^[2] Marchick was also responsible for supervising firm's branding and communications, research and sustainability issues. Marchick later served on Carlyle's Operating Committee and Management Committee.

In support of his work on domestic manufacturing investments, Marchick was awarded the "Solidarity and Appreciation Award" by the United Steelworkers.^[32][33]

Marchick retired from the Carlyle Group in December 2018.^[34]

After Carlyle, he served as Director of the Center for Presidential Transition at the Partnership for Public Service, an adjunct professor at the Tuck School of Business at Dartmouth, and Senior Of Counsel at the law firm Covington & Burling. As Director of the Center for Presidential Transition, he worked on a non-partisan basis on the Presidential Transition of 2020.^[35][36]

As Chief Operating Officer of the United States International Development Finance Corporation, Marchick served as the senior Biden appointee at the agency.^[37] During his tenure, DFC invested more than any time in the agency's 25-year history and invested in vaccine manufacturing capacity for 2 billion doses of COVID-19 vaccines.^[38][39]

He serves on the National Council of the National Park Foundation^[40] and the governing council for the United States Holocaust Memorial Museum.^[41]

In 2022, he was appointed as the dean of the Kogod School of Business at American University.^[42] With nearly 2,000 students and more than two dozen undergraduate and graduate degree and certificate programs, the Kogod School of Business is a leader in business education and is known for its outstanding academic pursuits in sustainability; analytics; cyber management; entrepreneurship; and hands-on learning.^[1]