Mr. Diarmaid Cunningham is Chief Administrative Officer, General Counsel, Executive Vice President and Company Secretary. 

Mr. Cunningham joined the Company as General Counsel in November 2009.  From 2009 until 2013, Mr. Cunningham was based in the Company’s global headquarters in Dublin.  In 2013, Mr. Cunningham was seconded to the Company’s US headquarters in Pennsylvania and that secondment ended in 2018 when Mr. Cunningham returned to Dublin.

In July 2016, Mr. Cunningham’s role expanded to include Chief Administrative Officer in addition to General Counsel which added responsibility for the Company’s Quality Assurance, Client Contracts Services, Facilities and Procurement groups in addition to his responsibility for the Company’s Legal group. In 2023, Symphony Health (ICON's data business) moved to report to Mr. Cunningham and was also added to his group. 

Mr. Cunningham graduated with a Bachelor of Business and Legal Studies from University College Dublin in 1997, qualified as a lawyer in 2001 and completed the Stanford Executive Program at Stanford University in California in 2015.  Mr. Cunningham served as Secretary to the Board of the Association of Clinical Research Organizations (ACRO) in 2013 and 2014 and 2020 and has been appointed again for 2021. ACRO represents the CRO industry globally to key stakeholders including pharmaceutical, biotech and medical device companies, regulators, legislators and patient groups.

Prior to joining the Company, Mr. Cunningham spent 10 years with A&L Goodbody, one of Ireland's premier corporate law firms.

In January 2021, Mr. Cunningham was appointed as a non-executive director of the Irish charity The Jack & Jill Foundation.

Mr. Simon Holmes leads ICON’s Corporate Investment and Partnerships group which has responsibility for capital allocation into M&A, equity investments and innovation partnerships. During his time at ICON Simon has led the acquisition of over 24 companies including the $12bn acquisition of PRA Health Sciences. A member of ICON’s leadership team since 2009 he is also involved in strategy development and business planning. Mr. Holmes joined ICON in 2005 originally as VP of Marketing and Market Development and took responsibility for Corporate Development in 2006. Between 2013 and 2017 he also had responsibility for ICON’s Investor Relations functions. Prior to joining ICON, Mr. Holmes held a number of senior roles within “Blue Chip” organisations in the IT Services and Telecommunications sectors, including Cable and Wireless, Logica and Microsoft. Mr. Holmes has an MBA from Smurfit Business school and is a graduate of Cambridge University and the University of East Anglia.

Ms. Ramita Tandon leads ICON Commercialisation and Outcomes, the industry leading provider of services to help life science companies achieve market authorisation, accelerate market access, and drive market adoption. ICON Commercialisation and Outcomes delivers resources and expertise to generate and analyse real world evidence and communicate treatment safety and value to help regulators, payers, providers and patients make informed health decisions. With over two and a half decades in the drug development industry, Ms. Tandon, is a recognised executive leader for her success in broadening boundaries, innovation, and architecting lean and efficient organizational models organically and through M&A activity. Ms. Tandon is known for her dynamic and engaging leadership encouraging teams to think more provocatively and to develop innovative solutions integrating expertise across the R&D landscape and through a treatment’s entire lifecycle to optimize biopharmaceuticals’ product value. Ms. Tandon is a sought after speaker, author and thought leader with regular industry commentary on the life-sciences industry and a member of the board of the Not-for–Profit Mapi Research Trust.

Mr. James Miskel holds management responsibility for ICON’s central laboratories, specialty laboratories, bioanalytical laboratories, and early clinical development services. He joined ICON with an initial focus on central laboratories in November 2013, after executive positions in general and operations management at Wyeth Pharmaceuticals and CROs MDS Pharma Services and Harlan Laboratories. Mr. Miskel spent his early career as a management consultant with McKinsey & Company leading engagements in growth strategy, operational improvement, and merger integration for clients in pharmaceuticals, medical devices, and several other sectors. He holds BS and MS degrees in engineering from the Massachusetts Institute of Technology along with an MBA from the Wharton School and an MA in International Studies from the University of Pennsylvania.

Mr. Joe Cronin is Chief Human Resources Officer, responsible for designing and implementing people practices and building organisational leadership and culture that enable ICON to execute its strategy. Mr. Cronin joined ICON in 2014. Mr. Cronin has almost 20 years of HR experience in a variety of global industries, including ten years at the Kellogg company in a number of regional and global HR leadership roles. Mr. Cronin also spent time early in his career with the General Motors (GM) Corporation and the Computer Sciences Corporation (CSC). Mr. Cronin has a Bachelor of Business degree with a major in Human Resources, from the University of Limerick.

Mr. O'Leary is ICON's Chief Information officer previous to this he held the position of President of ICON Central Laboratories. Mr. O'Leary joined the company in Feb-2001 as Manager of Data management in Dublin, Mr. O'Leary subsequently went on to set-up ICON's process improvement initiative "IMPROVE" and returned to Data Management to become EU VP of Data Management before becoming Global Head of Data Management in 2006. From 1994-2001 Mr. O'Leary worked for SmithKline Beecham and later GlaxoSmithKline and held positions in Data Management, Project Management and Resource Management. Mr. O'Leary is a graduate of Kingston University in Surrey and a Member of the Royal Society of Chemistry. Mr. O'Leary holds a Degree in Medicinal Chemistry and a Masters in Data Management.