Leads: strategy, culture, and the long-term direction of the company.

Mike's tenure at Justworks began in 2015 as its first independent board member. After four and a half years serving in this capacity, he transitioned from the Board to join as Chief Operating Officer in 2019.

In June 2021, Isaac and the Board promoted Mike to serve as President & COO and later to the role of President & CEO in November 2022. Before getting involved with Justworks, Mike co-founded Employease in 1996, an HR SaaS company he built for over a decade before its acquisition by ADP. After serving as a division vice president at ADP, he co-founded Euclidean Technologies, an investment management firm specializing in machine learning and long-term equity investing.

Mike holds a dual Bachelor’s Degree in Geology and History from Williams College. He lives in New York City with his wife and three daughters.

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Leads: Board of Directors

In addition to leading our Board, as Executive Chair, Isaac focuses on innovation at Justworks Labs, social impact initiatives via Justworks.org, and developing Justworks’ next generation of leaders through its Leaders’ Fellowship program.

Before founding Justworks, Isaac served for 12 years in the National Guard and Army Reserve as an intelligence officer, where the importance of an unshakeable team and a focus on people became clear to him. He began his professional career as a software engineer for Amazon, eventually leaving to build his first startup Adtuitive, which was acquired by Etsy in 2009.

At both Adtuitive and later Etsy, where Isaac led the HR and payments group, he recognized the system was broken. Frustrated by paperwork, exorbitant costs, and endless hours spent on administration instead of his team, he came up with the idea for Justworks in 2012. Isaac served as Justworks’ CEO for ten years (2012 - 2022) before transitioning into the role of Executive Chair in November 2022.

Isaac is a Fellow of the Aspen Institute’s 25th Henry Crown Fellowship and a member of the Aspen Global Leadership Network. He holds an MBA from Cornell University and a BS in Computer Science from the University of Illinois at Urbana-Champaign. He resides in Manhattan with his son James.

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Leads: legal strategy, ensuring compliance at the corporate level with all federal and state laws.

Mario leads Justworks’ Legal and Compliance functions, overseeing scalable support to internal teams on benefits, HR, payroll, compliance, and external communications. He also oversees the protection of Justworks’ intellectual property assets.

Before joining Justworks, Mario worked at ADP for ten years, first as General Counsel for their real estate function and later as Vice President, Compliance and Assistant General Counsel, where he co-developed and implemented ADP’s global compliance program. Prior to ADP, he practiced corporate and commercial real estate law for nine years at White & Case LLP, Morgan Lewis & Bockius LLP, and Greenberg Traurig LLP.

Mario holds a JD from the University of Virginia School of Law and a Bachelor’s Degree from the University of Chicago, where he was an all-American wrestler. He lives in New Jersey with his wife and three children.

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Leads: sales, business development, sales training & enablement, 24/7 full-service support, account management, and HR Consulting.

Robert has built Justworks’ consultative sales team of over 100 people, who act as trusted advisors and educators to businesses across the country. He has broad oversight to ensure a sales process that aligns with the company's core values of camaraderie, openness, grit, integrity, and simplicity. He is the champion of these values as the foundation of all sales and revenue efforts.

Robert joined Justworks as the first salesperson in 2014. Before Justworks, he worked for Groupon as the Head of Sales, Sales Operations, and Business Development before becoming the General Manager and CEO, Andean Region. Prior to this, he worked in Business Development for Platinum Equity, LLC and as a Senior Associate for Morgan Stanley.

Robert holds an MBA from the Stanford University Graduate School of Business and a Bachelor’s Degree in International Relations from the College of William and Mary.

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Leads: insurance, wealth, and other benefit programs.

David manages a cross-functional team with broad oversight to ensure delivery of clients’ health insurance, workers compensation, and other benefits in compliance with regulation across all 50 U.S. states.

He began his career as equity research analyst for Morgan Stanley and later Goldman Sachs, where he first covered legacy PEOs. David learned the ins, outs, and pitfalls of PEOs while covering Administaff (now Insperity) and Gevity (now part of TriNet). He first made the transition to the startup world at WellNet, where he built national, small group health plans as the Executive Vice President of Health Plan.

David holds a Bachelor’s Degree from Duke University and an MBA from Columbia University. He lives in Connecticut.

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Leads: the People function, corporate HR, and workplace structure

Allison leads the People, Workplace, and Corporate HR teams at Justworks, responsible for helping the leadership team navigate continued growth, organizational development, and manage teams to support employee well-being, professional development, and the workplace environment.

Before joining Justworks, Allison served as the Chief Human Resources Officer at The Metropolitan Museum of Art, where she was responsible for managing all human resources functions as well as project management of The Met’s Diversity, Equity, Inclusion and Access (DEIA) strategic planning. Prior to this, Allison held human resources and people community leadership roles at MacMillian Learning, Fab.com, and Kaplan.

Allison lives with her multi-generational family (mom, adult daughters and various friends, husband, large dog), in New York City. She holds a Bachelor’s Degree in English from Yale University and a Juris Doctor Degree from Columbia Law School.

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Leads: software development and architecture.

Yujin leads the Engineering department, guiding our technology teams and driving initiatives across the company to bring the impact of Justworks’ products and services to the next level.

Before joining Justworks, Yujin was the Chief Technology Officer at WorkMarket, a cloud-based workforce management solution startup acquired by ADP in 2018. As CTO of WorkMarket, he built a cloud-based, API-led enterprise SaaS strategy and scaled a successful engineering organization in size many times over. Prior to this, he held a leadership position at The New York Times where he played a key role in efforts to integrate its digital and print systems for major cost savings and operational efficiencies, as well as to launch its new design, next-generation paid digital products, development of Continuous Delivery, and event and behavior data-driven product strategy.

Yujin holds a dual Bachelor’s degree in German Language & Literature and History from Guilford College. He is based in New York City.

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Leads: Payments and Tax Unit (PTU).

Shankar manages a cross-functional team with broad oversight to ensure robustness and integrity of Justworks’ payments and tax operations, and is responsible for driving technological innovation to further scale the payments and tax engine, as well as deliver new features for Justworks’ small business customers.

With over a decade of experience, Shankar has led both engineering and non-technical teams at financial institutions. Prior to joining Justworks, he served as the Global Head of Engineering & Technology at Quantitative Brokers where he was responsible for growing the company’s global technology footprint and driving product expansion efforts.

Shankar holds a Bachelor’s Degree in Computer Science & Engineering from Anna University and a Master’s Degree in Management Information Systems from Texas A&M. He lives in Summit, NJ with his lovely wife.

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Leads: financial strategy, money-related operations, and capital management.

Johnathan oversees our Finance teams, responsible for equipping management with data and analysis to drive action that aligns with Justworks' overall growth strategy. He focuses on optimizing the company's return on capital while building controls and processes that scale effectively.

He started his career at Morgan Stanley in the investment banking division where he worked in both the Financial Sponsors Group and the Technology Group.

Johnathan is originally from Tennessee and holds a BA in English from Columbia University and an MBA from Oxford.

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Leads: diversity, equity, and inclusion; environmental, social, and governance; and Justworks.org

Yrthya holds a cross-functional position that embeds diversity, equity, and inclusion, social impact, and sustainability into all business practices at Justworks. In her role, Yrthya focuses on executing Justworks’ social impact vision and the company’s corporate social responsibility programming to further advance its commitment of serving the needs of customers, colleagues, and their respective communities. Her work to formalize and grow the company’s devotion to social, environmental, and governance issues is demonstrated in the development of Justworks.org, which is devoted to creating equitable access to entrepreneurship.

Prior to joining Justworks, Yrthya was the Culture and Operations Chief at the Open Society U.S Foundation where she led human resources, compliance, operations, work culture, and the organization's budget. Her career began working for the Manhattan Borough President where she focused on elevating constituent concerns to influence policy making. She later went on to become the first Chief Diversity Officer for the State of New York, furthering her support for Minority- and Women-Owned Business Enterprises (MWBEs) and workforce diversity across government. She has held roles across the public and private sectors including Robin Hood Foundation, Toyota, Thomson Reuters, Time Warner, and NYC Department of Education.

Yrthya serves on the board of the Hispanic Federation, Latino Victory Fund, and The Public Theater of New York. She holds a Bachelor’s Degree from Dickinson College and a Master’s in Public Administration from NYU Wagner Graduate School of Public Service.

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Leads: brand, marketing, communications, and demand generation.

Julie leads the Marketing team, spearheading advertising, content, and programming that builds trust, drives conversions, and supports Justworks’ community initiatives. Through integrated campaigns, the team amplifies the Justworks brand and drives growth.

Prior to Justworks, Julie worked at DeSantis Breindel, an independent branding and marketing agency in NYC. As the Managing Director of Engagement, she built the firm's content-driven digital marketing program from the ground-up and led a nimble team in the ideation, implementation, and optimization of creative and efficient digital marketing programs.

Julie holds an MBA from Wharton Business School and a Bachelor's degree from Tufts University. She resides in Union Square with her husband and two kids.

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Leads: strategic initiatives, special projects, strategic planning, investments, acquisitions, and partnerships

Jonathan leads a team that is responsible for driving revenue growth and market share by understanding the industry landscape, identifying business risks and opportunities, and by leading new investments, acquisitions and initiatives that enable the company’s long-term success.

Joining Justworks in 2017, Jonathan has been responsible for many of the company’s growth initiatives, including Justworks’ expansion into new markets, new product investments, and the acquisition and management of Boomr in 2020. Prior to Justworks, he worked in strategy and corporate development at iCIMS, Towers Watson, and SuttonPark Capital.

Jonathan holds a Bachelor’s degree in Finance from Manhattan College and a Masters of Business Administration from Pace University. He lives in Staten Island with his wife.

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Leads: operations scaling, business intelligence, and data analytics

Tim leads a team that is responsible for building and scaling operations in support of Justworks mission to help small and medium businesses grow with confidence. His team works cross-functionally to enable all Justworks departments to streamline systems, data, and processes necessary to do their best work. His team’s success has allowed Justworks to elevate its data-orientation to better understand the company’s impact and drive continuous improvement for customers.

Joining Justworks in 2017 with 15 years of sales and operations experience, Tim has held multiple positions supporting operations and data analytic functions for sales and revenue growth. It became clear that Tim’s work with data-driven functions for sales had a strong impact that could be adopted across the company, further developing his role at Justworks. Prior to Justworks, he held successful positions developing sales, operations, and customer success teams at ServiceSource and Actus Data.

Tim holds a Bachelors of Science degree from Santa Clara University. He lives in New Jersey with his wife and two daughters.

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