Since Portfolio was founded by Adrian Zackheim in 2001, it has emerged as a major force in nonfiction publishing for ambitious people. We connect readers with powerful ideas that inform and improve their lives, within the workplace and beyond. Portfolio authors are innovators, entrepreneurs, and experts who aren’t afraid to take risks and change the world. We strive to produce original books in fields such as technology, economics, entrepreneurship, biography, and investigative journalism, with a focus on educating and inspiring a new generation of innovative leaders.

Some of Portfolio’s bestsellers include Start with Why by Simon Sinek, #Girlboss by Sophia Amoruso, The Obstacle Is The Way by Ryan Holiday, Team of Teams by General Stanley McChrystal, This Is Marketing by Seth Godin, The Bullet Journal Method by Ryder Carroll, Brotopia by Emily Chang, and The Four by Scott Galloway.

Meet Portfolio

Adrian Zackheim

Adrian Zackheim

Founder, President, and Publisher

Adrian Zackheim joined Penguin Group in September 2001 as Founder and Publisher of Portfolio. He then took on the additional challenge of starting Sentinel in April 2003. In 2018, he announced the addition of another new imprint to the group: The Optimism Press, in collaboration with Simon Sinek.

Previously, he was the Associate Publisher and Editor-in-Chief of HarperInformation, a division of HarperCollins that included HarperBusiness. His editorial career has also included positions at William Morrow, Doubleday, and St. Martin’s Press, and his first job was as School and Library Publicity Assistant at G.P. Putnam’s Sons, which was then a privately held small publishing company. He later moved to Putnam’s Editorial department under the leadership of Editor-in-Chief Phyllis Grann.

Among the many bestselling books he edited and published before joining Penguin Group were Good to Great by Jim Collins; Die Broke by Stephen Pollan and Mark Levine; The Dilbert Principle by Scott Adams; The HP Way by David Packard; and Swim with the Sharks without being Eaten Alive by Harvey Mackay.

Tara Gilbride

Vice President, Director of Marketing & Publicity

Tara Gilbride has over 20 years of experience promoting non-fiction authors and their books. As VP, Publicity Director, Associate Director of Marketing, she is in charge of helping authors find the largest readership possible through customized media and event outreach, creative online marketing campaigns and by generating innovative promotions that ignite preorder campaigns and reinvigorate backlist. Recent campaigns she has worked on include the bestsellers MEASURE WHAT MATTERS by John Doerr, TOGETHER IS BETTER by Simon Sinek, and OUT OF THE MAZE by Spencer Johnson. Before joining Portfolio she spent over a decade at the Crown Publishing Group, where she oversaw marketing and publicity for Crown Business in addition to working with authors across categories, including bestselling authors T. Boone Pickens, AG Lafley, Meg Whitman, Eric Ries, Chip and Dan Heath, Reid Hoffman, Deepak Chopra, Steve Forbes, Cesar Milan, and David Sanger, and has coordinated marketing and media strategies with such organizations as P&G, LinkedIn, McKinsey, IDEO, Wharton, WIRED, Wall Street Journal and Forbes Magazine. She lives in CT with her husband and two children.

Niki Papadopoulos

Niki Papadopoulos

Editorial Director

Niki Papadopoulos joined Portfolio in 2011 as a Senior Editor, and is a passionate advocate for business as a tool for empowerment, innovation, and social good. In addition to overseeing general acquisition strategy for the Portfolio imprint, she acquires and edits a wide range of commercial nonfiction for ambitious people, from idea-driven business books to narrative, biography, memoir, investigative journalism, and self-help. In the last decade she has published twelve New York Times bestsellers and seventeen Wall Street Journal bestsellers, including This Is Marketing by Seth Godin; The Obstacle Is the Way by Ryan Holiday; The Four by Scott Galloway; Captivate by Vanessa Van Edwards; Thinking in Bets by Annie Duke; The Death of Money by James Rickards; Hooked by Nir Eyal; and American Kingpin by Nick Bilton.She tweets about grammar, dogs, and what happens to authors who don’t turn their manuscripts in on time at @niki_pop.

Meet More

Bria Sandford

Executive Editor

Bria Sandford joined Portfolio in 2012. She enjoys editing leadership narratives, economic policy, geopolitics, history, and prescriptive career guides. Her bestselling authors include retired four-star General Stanley McChrystal, political scientist Ian Bremmer, and career advice guru Jon Acuff.  She tweets at @blsandford.

Trish Daly

Senior Editor

Trish Daly joined Portfolio in 2019 as a Senior Editor. Previously she held positions at the Little, Brown imprint of Hachette Book Group, working with the world’s bestselling author James Patterson; and the William Morrow imprint of HarperCollins where she acquired Margot Lee Shetterly’s #1 bestseller HIDDEN FIGURES, later adapted for an Oscar-nominated film. Forthcoming titles include a true-crime narrative exposing college admissions fraud from Wall Street Journal investigative reporters Melissa Korn and Jen Levitz; and Dr. Gero Leson’s LET IT GROW, a travelogue account of his work advancing the environmental and social mission of Dr. Bronner’s Magic Soaps. Trish is most interested in narrative and idea-driven nonfiction from experts and storytellers, including journalism, history, economics, sociology, environmental issues, technology, and current affairs, and as a recreational distance runner, she’s also drawn to books about sports and fitness, adventure, and food. She retweets smart and funny authors at @trish_daly.

Leah Trouwborst


Leah Trouwborst joined Portfolio in 2015. She has edited Bullet Journal founder Ryder Carroll’s New York Times bestselling guide The Bullet Journal Method; Julie Zhuo’s The Making of a Manager, Liz Fosslien and Mollie West Duffy’s No Hard Feelings, Scott Adams Win Bigly, and Marie Forleo’s forthcoming Everything Is Figureoutable. She’s looking forward to editing more fresh voices, talented storytellers, and rigorous thinkers in the idea-driven and prescriptive nonfiction spaces, including business, economics, finance, technology, behavioral science, self-help, memoir, biography, and investigative journalism.

Kaushik Viswanath

Associate Editor

Kaushik Viswanath joined Portfolio in 2015 as an editorial assistant. He likes to edit prescriptive and idea-driven books on entrepreneurship, sales, marketing, business strategy, technology, and economics. His authors include Cofounder/CEO of VC firm 1776 Evan Burfield, small-business growth expert Mike Michalowicz, and Anthony Iannarino of The Sales Blog. When he’s not editing or reading or writing or singing, you can find him lurking on Twitter @kozemoze.

Merry Sun

Associate Editor

Merry Sun joined Portfolio as an editorial assistant in 2015 and is now an associate editor. She particularly enjoys editing idea-driven books about counterintuitive concepts in economics, finance, behavioral science, and technology. Her favorite authors have provocative ideas about the way the world works, and a burning passion to spread those ideas to ambitious readers. Her authors include Harvard Business School professor Laura Huang, founder of Serious Eats Ed Levine, Columbia Business School professor Michael Morris, Wall Street Journal reporter Gregory Zuckerman, New York magazine writer Melissa Dahl, and CNET cofounder and former ambassador to the UK Matthew Barzun. She has a soft spot for books about food and the food industry and very strong opinions about where to go for lunch.