Meet our Dayforce Leaders

David Ossip is Chair and CEO of Dayforce. Under David’s leadership, Dayforce is a recognised global leader in HCM, powered by the award-winning Dayforce platform. David was the Founder and CEO of Dayforce, which was acquired by Ceridian in 2012. 

A transformational technology leader and serial entrepreneur, David has more than 30 years of experience building and leading successful HCM technology companies. 

He is the recipient of multiple leadership awards, including Waterstone Human Capital’s Most Admired CEO for Transformational Leadership and Glassdoor’s Highest Rated CEOs. David also is an investor, advisor and mentor in the Canadian business and technology communities.

David holds a Master of Business Administration degree from Harvard Business School and a bachelor’s degree in econometrics from University of Toronto. 

Sam Alkharrat is Chief Revenue Officer of Dayforce. Sam oversees the global sales team and has  responsibilities for fostering existing and prospective customer relationships globally.

An accomplished B2B software executive, Sam has over two decades of experience building and nurturing high-performance cultures at enterprise technology companies. Prior to joining Dayforce in 2023, he held senior roles at Workday, C3 AI, VMWare, SAP and Cisco Systems.

Sam holds a Global Executive MBA from Duke University and a bachelor’s degree in science from the University of Toledo.

Chris Armstrong is Chief Operating Officer at Dayforce. Chris is responsible for driving scale, efficiency and growth for Dayforce’s operations globally.  

Since joining Dayforce in 2004, Chris has held several leadership roles, including Chief Customer Officer, where he oversaw overall customer experience and satisfaction through his leadership of the Global Customer Office (GCO).  

Chris is an active supporter of Dayforce's charitable giving campaigns. He holds a bachelor’s degree in Finance from Texas A&M University.  

Brian Donn is Managing Director, Asia Pacific Japan (APJ) at Dayforce. Brian is responsible for the overall leadership of Dayforce’s operations in the Asia Pacific & Japan region. He is passionate about both employee and customer experience and a firm believer that a relentless focus on both leads to high-performing teams and a sustainable, winning culture.

With more than 25 years of experience in enterprise software, services and applications across the EMEA & JAPAC regions, Brian joined Dayforce in 2022 to lead the organisation's operations across Australia and New Zealand. Previously, Brian held leadership positions at various firms including Oracle, Verint Systems Inc and KANA Software.  

Brian holds a bachelor’s degree graduating with Highest Distinction in Information Technology & Marketing from studies at both the University of West of Scotland (UK) and the Amsterdam University of Applied Sciences (Netherlands).

Eric Glass is Chief Marketing and Communications Officer at Dayforce. In his role, Eric is responsible for driving awareness, market share and growth across the business through global marketing and communications strategies. This includes product marketing, global brand, digital marketing, corporate communications and corporate responsibility and sustainability.

Eric joined Dayforce in 2020 as Chief Communications Officer. Prior to that, Eric spent nine years at Workday, serving as Vice President and Head of Corporate Communications, where he built and led the global communications function. Previously, he served in senior roles at Hill+Knowlton Strategies and Edelman.

Eric holds a bachelor’s degree in communications from The University of Alabama and is based in London, UK.

Steve Holdridge is President, Customer and Revenue Operations at Dayforce. In this role, he leads Dayforce’s customer and revenue functions globally, with a focus on driving a best-in-class customer experience with quantifiable value at every touchpoint.

Holdridge is a seasoned leader with over 30 years of experience driving sales and customer experience teams to success throughout his career.  Before taking on this expanded role, Holdridge was Dayforce’s Chief Customer officer. Prior to Dayforce, Holdridge held global leadership roles at leading technology firms including MicroStrategy, Infor, Oracle and Price Waterhouse.

Steve holds a bachelor’s degree in Business Administration from California Polytechnic, San Luis Obispo and is former member of the TSIA (Technology Services Industry Association) Executive Advisory board.

Jeff Jacobs is Head of Accounting and Financial Reporting at Dayforce. He is responsible for global accounting, billing, collections and reporting, as well as internal controls over financial reporting. 

Prior to joining Dayforce in 2015, he held senior accounting and finance roles at General Mills, Inc. and KPMG LLP. 

Jeff is a certified public accountant (inactive) and holds a bachelor’s degree in business administration (Accounting) and a master’s degree in accountancy from the University of Wisconsin, Madison. 

Justine Janssen is Chief Strategy Officer at Dayforce. In her role, Justine oversees Dayforce's strategic goals and transformation initiatives, ensuring that they align with the company’s vision, core objectives and its continued growth. 

Justine initially joined Dayforce in 2012 where she held diverse leadership positions, including managing large-scale transformation initiatives and leading organisational strategy, prior to her departure in 2021. Most recently and prior to joining Dayforce, she served as an independent consultant on strategic projects. 

Justine has been recognised as one of Canada’s Top 40 Under 40, one of Canada’s Top 100 Most Powerful Women, one of the Top 25 Canadian Women in Tech and as a Woman of Excellence for Achievement in Business. She is a graduate of the Ivey Business School at Western University.

Jeremy Johnson is Chief Financial Officer at Dayforce. In his role, Jeremy is responsible for the global finance functions, including accounting and financial reporting, financial planning & analysis, tax, treasury, cash management, payroll trust operations, facilities, financial operations and investor relations.

Jeremy first joined Dayforce in 2012 where he spent nearly a decade within Dayforce's finance team and played a key role in scaling the finance function through periods of rapid growth. Most recently and prior to re-joining Dayforce, he served as CFO and interim CEO at SmartRecruiters, Inc. where he led the global finance function, as well as legal and privacy.

Previously, he held a variety of finance, accounting and audit positions at Capella Education Company and KPMG. Jeremy is a Certified Public Accountant and has a Masters in Accounting, with a speciality in Financial Reporting from Michigan State University.

Donnebra McClendon is Head of Diversity, Equity and Inclusion (DE&I) at Dayforce. Donnebra is responsible for designing and driving policies and programmes to ensure equity and fairness across the organisation. Donnebra first joined Dayforce in 2004.  

Donnebra is passionate about cultivating a consciously unbiased and intentionally inclusive culture. She established a non-profit organisation, Leaders are Readers, supporting literacy in the Tampa Bay area. 

Donnebra holds a bachelor’s degree in liberal arts and sciences and a master’s degree in organisational leadership from Bethune-Cookman University. She also received a diversity, equity and inclusion certification from Cornell University and is currently a doctoral student in strategic leadership at Carolina University.  

Joe Korngiebel is Chief Product and Technology Officer at Dayforce. Joe leads the company’s ambitious innovation strategy, designed to ensure its innovations continue to surpass customer expectations, disrupt the industry and drive forward the company’s position as a world-class HCM partner. 

Prior to joining Dayforce in 2020, Joe served as Chief Technology Officer at Workday after a 14-year tenure that included roles as Senior Vice President of Experience Technology, Vice President of Mobile applications and Founder of Workday Labs. A seasoned technologist, Joe has also held senior roles at Oracle and PeopleSoft.

Joe serves on the board of directors of the PulsePoint Foundation and holds a bachelor’s degree in science, mathematics and computer science from California Polytechnic State University at San Luis Obispo, where he is also an industry advisory board member.

As Executive Vice President, General Counsel and Corporate Secretary, Bill McDonald is responsible for Dayforce’s global legal activities and compliance programmes, including commercial transactions, corporate governance, mergers and acquisitions, privacy and product compliance.

Bill joined Dayforce in February 2016 as Senior Vice President, Deputy General Counsel and Corporate Secretary. Prior to that, he was a partner with the law firms of Oppenheimer Wolff & Donnelly LLP and Fox Rothschild LLP in Minneapolis, Minnesota, where his practice focused on advising public and private companies on corporate, securities and transactional issues. Previously, Bill held leadership roles in the legal departments of Dayforce and SUPERVALU INC. and has served as a board member for Gillette Children's Speciality Healthcare, Second Harvest Heartland, Special Olympics Minnesota and the Minnesota High Tech Association. 

Bill received his Juris Doctor from Vanderbilt University School of Law in Nashville, Tennessee and his undergraduate degree in finance and business economics from the University of Notre Dame.

Carrie Rasmussen is Chief Information Officer at Dayforce. Carrie leads all aspects of global Information technology at Dayforce with the objective of creating an optimise infrastructure and data strategy across all operations. Carrie joined Dayforce in 2021. 

Carrie is an industry veteran with more than 20 years of experience leading enterprise organisation. Previously, she was Chief Information Officer at The Save Mart Companies and has also held senior leadership roles at Safeway Inc.  

Carrie holds a bachelor’s degree in agriculture and a master’s degree in agriculture business management from the California Polytechnic State University at San Luis Obispo.

Erik Zimmer is Executive Vice President of Corporate Development and Head of Mergers & Acquisitions and Investor Relations at Dayforce. Erik has been leading Dayforce’s corporate strategic initiatives since 2018.

Erik has extensive experience in finance, operations, innovation, sales and strategy. Prior to joining Dayforce, Erik served as a Managing Director of Thomas H. Lee Partners, L.P. and as an operating advisor for numerous Fortune 1000 organisation. Since 2011, Erik has acted as a strategic advisor to Dayforce and had deep involvement in the design and build of Dayforce technology. 

Erik holds a bachelor’s degree in mechanical engineering from the University of Colorado Boulder. He received his master’s degree in engineering, design and operations management from McCormick School of Engineering, Northwestern University and his Master of Business Administration from Kellogg School of Management, Northwestern University.