About Ad Hoc

Ad Hoc is a small software engineering company that came out of the successful effort to rescue HealthCare.gov after its disastrous initial launch.

Ad Hoc is focused on delivering and operating fast, stable, and well-designed services on behalf of U.S. federal and state government that enables agencies to provide transactional and informational services to consumers. We do this by bringing people from startups and successful private sector technology companies to these problems, collaborating closely with government partners to deliver software that actually works.

Contract vehicles

Ad Hoc has been awarded prime contracts under the following vehicles:

  • General Services Administration (GSA) Schedule 70, 132-51 Information Technology Professional Services, GS-35F-392DA, June 30, 2016 – June 29, 2021. This covers a broad range of software engineering, UX design, web design, web development, and development management for federal government.

  • Department of Homeland Security (DHS) Flexible Agile Support for the Homeland (FLASH), HSHQDC-17-D-FL012. The FLASH Contract is for a one (1) year base ordering period with an option for an additional two (2) one (1) year ordering periods. FLASH is estimated to have a maximum contract value of $1.54 billion over the three (3) year period of performance. FLASH is one of several initiatives that enable DHS to implement solutions using advanced technologies and techniques.

  • Centers for Medicare & Medicaid Services (CMS) CMS Agile Delivery to Execute Legislative Endeavors for Quality Related Initiatives (ADELE-QRI) BPA (Blanket Purchase Agreement), HHSM-500-2016-00008B, September 16, 2016 - September 15, 2021. This covers “support of procuring expert services to support the IT development under CMS Quality Related Initiatives through the transition into and delivery of agile development. The overall objective of this vehicle is to give the users with CMS Quality Related Initiatives a fast and effective way to procure agile development services as detailed in the BPA Scope and Task Areas. In this process, the BPAs will allow eligible ordering activities to save procurement time, reduce contract duplication and realize economies of scale through high-volume ordering.”


Ad Hoc is open to working with partners as both prime contractors and subcontractors. Here’s a look at a successful engagement:

  • Agile development environments that use the same tools, technologies, and processes used in the private sector

  • Projects that have defined areas of responsibility around a discreet piece of functionality for the end user. We value full-stack teams rather than staff augmentation

  • Consumer-facing government digital services that require a superior user experience, solid graphic design, and the performance and scalability that underlies modern platforms

  • Projects that rely on legacy systems that have source of truth and business logic, with challenges around processing & reliability and need improvement of user experience

  • Working with change agents who can evolve legacy systems to support features that people really need in large-scale public interactions

  • The opportunity to work on things that are meaningful and impactful. This is a clear value proposition to attract the people from private sector tech companies

The HealthCare.gov rescue

Following the initial launch of HealthCare.gov in 2013, the White House assembled a team of top technology talent from outside of government, to assess what was wrong and come up with a plan to fix it.

Greg and Paul, Ad Hoc’s cofounders and principals, were part of that original group, known as the ad hoc team, that went in and worked along side those who had built HealthCare.gov. Through their expert leadership and effort, they stabilized the site and ensured that millions of Americans were able to get affordable health coverage.

Read more on the rescue of HealthCare.gov.

The Ad Hoc Team

  • Photo of Paul Smith, Chief Technology Officer & Co-founder at Ad Hoc

    Paul Smith

    Chief Technology Officer & Co-founder

    Paul Smith is a software engineer who has been developing applications professionally for more than fifteen years. He was a co-founder of EveryBlock, a pioneering hyperlocal news startup. He worked on the 2012 re-election campaign of President Obama as the deputy director of technology of the DNC. Paul was a leader of the team that fixed HealthCare.gov after its troubled launch.

  • Photo of Greg Gershman, Chief Executive Officer & Co-founder at Ad Hoc

    Greg Gershman

    Chief Executive Officer & Co-founder

    An experienced software developer and entrepreneur, Greg’s career has included work in both startups and government. Greg’s experience as a Presidential Innovation Fellow and as part of the “tech surge” that fixed HealthCare.gov after its troubled launch, and his belief that small, smart teams of developers can improve how government delivers services, led him to co-found Ad Hoc.

  • Photo of Mike Auclair, Software Engineer at Ad Hoc

    Mike Auclair

    Software Engineer

    Mike is a software engineer with over a decade of industry experience, building CRMs, real estate platforms, and large-scale applications for government.

  • Photo of Jeff Balboni, Software Engineer at Ad Hoc

    Jeff Balboni

    Software Engineer

    Jeff is a front-end engineer with ten years of experience building applications on the web. He’s passionate about building user interfaces that are friendly and easy to use.

  • Photo of Rachel Baliff, Director of Human Resources at Ad Hoc

    Rachel Baliff

    Director of Human Resources

    Rachel is a results-oriented HR leader with 15+ years experience in technology start-ups, media, & consumer goods. She is committed to delivering progressive HR initiatives, championing a fair, consistent approach to staffing & management, and exceeding internal & external client expectations.

  • Photo of Brian Bonenberger, Software Engineer at Ad Hoc

    Brian Bonenberger

    Software Engineer

    Brian is a front-end software engineer who spent a decade building web applications for giant corporations and tiny startups before joining Ad Hoc.

  • Photo of Danny Chapman, Creative Director at Ad Hoc

    Danny Chapman

    Creative Director

    A designer of applications and services, Danny has over ten years experience improving citizen interactions with government. Danny specializes in taking government user experience from backwards and dated, to cutting edge and award-winning.

  • Photo of Nick Clyde, Software Engineer at Ad Hoc

    Nick Clyde

    Software Engineer

    Nick is a software engineer who is passionate about improving healthcare by fiddling around with computers. He also happens to be obsessed with making really good coffee.

  • Photo of Alastair Dawson, Software Engineer at Ad Hoc

    Alastair Dawson

    Software Engineer

    Alastair has over 15 years experience developing applications for both startups and established companies. Having worked in the media, banking, and mobile sectors he’s excited to bring his insight to Ad Hoc and help streamline government services.

  • Photo of Sophia Dengo, Designer at Ad Hoc

    Sophia Dengo


    Sophia is a designer/developer who loves to solve problems. She was introduced to civic tech in 2015 as a Code for America Fellow and comes to Ad Hoc after a year of getting to know how American city governments work. In a former life, she built multimedia storytelling interfaces for a major news outlet. When not in front of a computer screen, you can find her at a jeweler’s bench or the nearest yarn shop.

  • Photo of Eugene Doan, Software Engineer at Ad Hoc

    Eugene Doan

    Software Engineer

    Eugene is a developer with experience working on web and desktop applications. He believes in building software with form and function that delights users.

  • Photo of Laura Ellena, User Experience Researcher at Ad Hoc

    Laura Ellena

    User Experience Researcher

    Laura is a user experience researcher who is interested in plain language and hearing strangers’ life stories on public transit. She previously worked on police open data as a 2015 Code for America Fellow.

  • Photo of Robert Fairhead, Technical Project Manager at Ad Hoc

    Robert Fairhead

    Technical Project Manager

    Bob has more than a decade of experience across government and the private sector. He’s worked on business strategy, foreign affairs, and technology projects.

  • Photo of Louis Fettet, Software Engineer at Ad Hoc

    Louis Fettet

    Software Engineer

    Louis is a software engineer with a passion for projects that matter. He has experience working on the open data programs of a handful of government organizations, and is excited to continue repeating the phrase “I fight for the users” as he takes on projects at Ad Hoc. In his spare time he plays a variety of tabletop games and video games and obsesses over all things A Song of Ice and Fire.

  • Photo of Oren Fromberg, Software Engineer at Ad Hoc

    Oren Fromberg

    Software Engineer

    Oren has over a decade of experience developing software. Passionate about the web, he also has broad expertise with robotics, computer vision, simulation, and augmented reality. Driven by making other people say “wow”.

  • Photo of Chris Gansen, Software Engineer at Ad Hoc

    Chris Gansen

    Software Engineer

    Chris is a regular guy who likes making software that helps people live better lives. Over the course of his career, he has helped build software to re-elect a president, raise millions of dollars for charity, educate small-business owners in developing economies, and help folks get coupons for canned tuna.

  • Photo of Katie Gwinn, Operations Analyst at Ad Hoc

    Katie Gwinn

    Operations Analyst

    Katie is a lover of lists, spreadsheets and people. Her role with Ad Hoc allows her to bring these all together and focus on all things Operations. Prior to joining Ad Hoc, Katie worked in the financial services and aerospace & defense industries.

  • Photo of Aubrey Holland, Software Engineer at Ad Hoc

    Aubrey Holland

    Software Engineer

    Aubrey stumbled into a job doing atmospheric modeling in Fortran way back in 1995 and hasn’t stopped writing code since. His career has consisted primarily of web development projects for startups, primarily using languages and tools not developed in the 1950s.

  • Photo of Alexis James, Delivery Manager at Ad Hoc

    Alexis James

    Delivery Manager

    Alexis is an experienced Project/Product Manager with over 10 years of experience working on diverse software/web products for government, military, hospital and university clients. She brings her personal passion for thoughtful user experience/interaction design to all of her work.

  • Photo of Carl Johnson, Software Engineer at Ad Hoc

    Carl Johnson

    Software Engineer

    Carl is a philosopher and programmer. His first computer was a Laser 128.

  • Photo of Chris Johnson, Software Engineer at Ad Hoc

    Chris Johnson

    Software Engineer

    Chris began his career over a decade ago enlisting in the Air Force as a computer programmer. Since then, he’s generally worked on web applications for a variety of startups. He prefers spaces vs. tabs, vim vs. emacs, and Coke vs. Pepsi.

  • Photo of Kam Karshenas, Software Engineer at Ad Hoc

    Kam Karshenas

    Software Engineer

    Kam wrote his first lines of code at the age of 10, modifying Gorillas.bas to make bigger explosions. He has since honed his skills in multiple programming languages and is passionate about crafting beautiful, well-tested and secure web applications (so that things don’t explode).

  • Photo of James Kassemi, Software Engineer at Ad Hoc

    James Kassemi

    Software Engineer

    James is passionate about crafting well tested and scalable software applications. He is excited to apply over a decade of experience in the startup world to enhancing government services.

  • Photo of Brian King, Software Engineer at Ad Hoc

    Brian King

    Software Engineer

    Brian likes to write clean, portable, and practical software. He can be found among his dog entourage, donut and coffee in-hand.

  • Photo of Ken Koski, Software Engineer at Ad Hoc

    Ken Koski

    Software Engineer

    Ken got a taste of software development by doing frontend work for a startup, and has never looked back. He writes software that maximizes happiness and minimizes pain.

  • Photo of Ben Kutil, Designer at Ad Hoc

    Ben Kutil


    Ben focuses on design systems that help people succeed, with an emphasis on performance and accessibility.

  • Photo of Elizabeth Lewis, Technical Project Manager at Ad Hoc

    Elizabeth Lewis

    Technical Project Manager

    Elizabeth joins Ad Hoc with 15 years of project/program management experience ranging from process improvement to software implementations and everything in between. She thrives off projects that result in change and a positive user impact.

  • Photo of Lihan Li, Software Engineer at Ad Hoc

    Lihan Li

    Software Engineer

    Lihan is an engineer engineering emazing ebsites.

  • Photo of Maury Lindo, Software Engineer at Ad Hoc

    Maury Lindo

    Software Engineer

    Maury is a software engineer who has an eye for pixel perfection. He aims to create visually stunning and interactive websites.

  • Photo of Austin Martinez, Software Engineer at Ad Hoc

    Austin Martinez

    Software Engineer

    Austin is a software engineer with experience working at Silicon Valley startups. He is excited to create software that impacts millions of people and streamlines government processes.

  • Photo of Wryen Meek, Business Analyst at Ad Hoc

    Wryen Meek

    Business Analyst

    Wryen is passionate about building Civic Technology that works for everyone, every time. He is excited to join the Ad Hoc team to craft 21st-century solutions that matter.

  • Photo of Curtis Mejeur, Program Director at Ad Hoc

    Curtis Mejeur

    Program Director

    Curtis is an experienced program manager who has grown large and small programs.
    He led the US Government’s technical response to the breach at OPM. He believes strongly in enabling the autonomy of engineering.

  • Photo of Bill Mill, Software Engineer at Ad Hoc

    Bill Mill

    Software Engineer

    Bill is a software developer with more than ten years of experience creating programs of all sorts. He gets data from the database to where it needs to go with a minimum of fuss and a maximum of efficiency.

  • Photo of Michael Miller, Software Engineer at Ad Hoc

    Michael Miller

    Software Engineer

    With a background in academia (computer science and formal reasoning systems), government, and private industry, Michael has been developing software for more than fifteen years. He has a strong interest in research which has led to a number of patents and successful applications.

  • Photo of Leanna Miller Sharkey, Technical Project Manager at Ad Hoc

    Leanna Miller Sharkey

    Technical Project Manager

    Leanna joins Ad Hoc as a technical project manager. She’s excited to help the team develop elegant solutions to important problems. Before Ad Hoc, Leanna specialized in product development and marketing for startups.

  • Photo of Ryan Nagle, Software Engineer at Ad Hoc

    Ryan Nagle

    Software Engineer

    Ryan builds internet things to help people better understand and get along with the world around them. Before joining Ad Hoc, he worked in journalism, helping news organizations (e.g., Chicago Tribune, INN, BreakingNews.com) share their reporting with the world.

  • Photo of Juliana Neelbauer, Chief Operating Officer at Ad Hoc

    Juliana Neelbauer

    Chief Operating Officer

    Juliana leads business operations at Ad Hoc following her years of experience as a corporate counsel for software companies, business consultant, college lecturer, hackathon mentor to organizers and hackers, tech law blogger, and as an adviser to hundreds of engineers and executives.

  • Photo of Mark Olson, Software Engineer at Ad Hoc

    Mark Olson

    Software Engineer

    Mark is a backend software developer who sometimes yearns for halcyon days of TI-BASIC and making sites entirely in Notepad.

  • Photo of Daniel X. O’Neil, Director of Product Development & Business Strategy at Ad Hoc

    Daniel X. O’Neil

    Director of Product Development & Business Strategy

    Dan has worked on the Internet since 1998, running consulting practices, building products, and starting companies. He is a co-founder of EveryBlock, founding executive director of Smart Chicago, and a board member at Voqal and Sunlight Foundation.

  • Photo of James Rhein, Software Engineer at Ad Hoc

    James Rhein

    Software Engineer

    James is a software engineer who has been writing code to help people obtain health insurance since the beginning of his career. He is excited about helping to develop software that makes a difference in people’s lives.

  • Photo of Rachael Roueché, Technical Project Manager at Ad Hoc

    Rachael Roueché

    Technical Project Manager

    Rachael is crazy about using the web to make complex tasks easy. She’s been in the project management world for seven years, working with teams to deliver software, websites, mobile apps (and more!) for organizations large and small.

  • Photo of Bill Ryan, Software Engineer at Ad Hoc

    Bill Ryan

    Software Engineer

    Bill is a programmer with a background in software security. He spends his days working up and down the tech stack; changing stuff and seeing what happens.

  • Photo of Ben Shyong, Software Engineer at Ad Hoc

    Ben Shyong

    Software Engineer

    Ben Shyong is a software engineer who first got into computers when playing solitaire on a Windows 3.1 machine. He was a co-founder of Meddik, a digital health startup serving online patient communities, and has built several side projects including an internet-enabled microwave.

  • Photo of Graham Smith, Software Engineer at Ad Hoc

    Graham Smith

    Software Engineer

    Graham is a software engineer with over a decade of experience in all sorts of projects. He joined Ad Hoc after working in the ad tech & healthcare industries.

  • Photo of Sarah-Jaine Szekeresh, Software Engineer at Ad Hoc

    Sarah-Jaine Szekeresh

    Software Engineer

    Sarah-Jaine is passionate about making the world a happier, healthier and more productive place through web development and software innovation.

  • Photo of Chris Szeluga, Delivery Manager at Ad Hoc

    Chris Szeluga

    Delivery Manager

    Chris has an interest obsession with finding efficiencies in anything from critical government software development lifecycles to making pancakes.

  • Photo of Alex Taylor, Designer at Ad Hoc

    Alex Taylor


    Alex has been using design and technology to make things better than they were for over fifteen years. These days those things are mostly web applications.

  • Photo of Ian Topper, Technical Project Manager at Ad Hoc

    Ian Topper

    Technical Project Manager

    Ian has a decade of experience across the military, government and the private sector. Before joining AdHoc, Ian spent his time blowing things up as an Army Explosive Ordnance Disposal officer, but now he focuses on defusing problems encountered while developing products.

  • Photo of Christopher Valarida, Software Engineer at Ad Hoc

    Christopher Valarida

    Software Engineer

    Web developer by day, vigilante musician / gamer / computer geek by night. Chris started learning to program as a kid so he could make video games, but now uses those skills to make the web a more beautiful place whenever he can.

  • Photo of Patrick Vinograd, Software Engineer at Ad Hoc

    Patrick Vinograd

    Software Engineer

    Patrick has over a decade of experience building messaging and virtualization infrastructure. He spends his time making computers talk to each other, and making computers not talk to each other.

  • Photo of Kristin Walker, Research Coordinator at Ad Hoc

    Kristin Walker

    Research Coordinator

    Kristin has a passion to make a difference. Being able to connect with people and be a part of change is what she strives for.

  • Photo of Caitlin Weber, Designer at Ad Hoc

    Caitlin Weber


    Focused on social impact work, Caitlin is a designer trained to see patterns, and parallels across seemingly disparate ideas. She is a translator and short term expert, burdened with understanding concepts broadly (sometimes deeply), and interpreting that expert understanding into a human one.

  • Photo of Rob Wilkerson, Software Engineer at Ad Hoc

    Rob Wilkerson

    Software Engineer

    Rob is a software engineer, but he hasn’t always been one. He’s also been an architect, a carpenter and a paratrooper, but never a butcher, baker or candlestick maker.

  • Photo of Mel Woodard, Designer at Ad Hoc

    Mel Woodard


    Mel is focused on building beautiful, intuitive and scaleable products, with experience creating both complex enterprise applications and consumer experiences.