Sourcing Solutions and Deal Advisory

Clay Calhoun, ISG Partner and ISG Sourcing Solutions Leader, is a senior member of ISG’s Americas Leadership Team. He brings more than 25 years’ experience in IT consulting, strategy, service delivery, and advisory services. His experience includes leading, managing, and supporting Global 2000 client engagements which consider solutions that maximize the benefits from internally optimized and sourced service delivery operations. With ISG, Clay has advised on more than 50 engagements totaling more than $25B of contract value.

What she does at ISG

Andrea approaches her clients’ toughest problems, most ambitious goals, and most compelling opportunities with a simple and inspiring motto: “Everything is possible.” She grounds this visionary outlook with an exceptional understanding of what it takes for businesses to succeed into today’s complex markets, and how ISG’s portfolio of solutions and services can help them make rapid competitive transformations. 

Past achievements for clients

Andrea began her career in banking and classical business management environments. In her career at ISG, she has built on this rigorous foundation, cultivating a holistic expertise that allows her to apply her knowledge and experience across the entire business process optimization and digital transformation life cycle, from assessment through value realization. 

Among her 100+ engagements with ISG’s largest global clients, Andrea worked directly with senior leadership at a leading global healthcare firm to reshape their digital agenda. The company had never outsourced IT and needed to catch up with the market fast. She orchestrated a complete digital transformation, establishing a cutting-edge, product-aligned organization that leapfrogged legacy technology to achieve a rapid positive transformation – a process that many companies take a decade or more to complete. 

Ant leads ISG's UK & Ireland Market.  He works with clients to navigate their most complex challenges and support them to over-achieve their goals. He is excellent at building broad relationships and driving consensus amongst a diverse range of stakeholders. He uses his experience gained working at senior levels in large enterprise clients, coupled with deep relationships with the service provider community, to drive the best possible outcome for clients. He has worked across a range of different sectors, from the top end of the FTSE100 to local government and charities.  In each case, he works to understand client imperatives, and design solutions tailored to deliver their objectives.

Chuck Walker, ISG Partner and America’s Transaction and Transition Leader, leads the Sourcing Strategy group within the Sourcing Solutions team. Chuck brings more than 25 years’ experience in IT strategy, service delivery, consulting and advisory services including assessments, strategies, transactions, implementations, service management and corporate governance and compliance.

Dr. Daniel Gerster is a Partner at ISG and offers clients more than 22 years of experience in strategic information management, thereof nine years as global CIO in a professional services company and more than 13 years in management consulting. Daniel helps CIOs and leading IT executives to successfully master digital transformation and to increase core capabilities such as organizational agility or resilience. He has a highly successful track record in CIO advisory. He is a well-known specialist for IT sourcing and contracting and covers commercial, legal and data protection aspects. He is a recognized speaker at conferences for IT executives, on IT events such as Sapphire, DSAG, VOICE, and BME IT Sourcing, VOICE Entscheiderforum.

Mr. Loeer is a proven leader in IT operation and management and in IT outsourcing. He has demonstrated expertise in assessment, strategy development and sourcing transactions. Friedrich's clients benefit from his 35 years of IT industry tenure, his practical experience in IT thereof more than 18 years in sourcing. Friedrich also offers clients his expertise in the financial services industry, manufacturing and automotive.

What he does at ISG

Julien oversees ISG’s IT and technology consulting and advisory teams across South Europe, Middle East and Africa with a strong focus on Italy. He works to make sure that clients are using the right technology to optimize your internal IT operations, including workflow, efficiency, and that they’re getting the most from every interaction with their technology service providers.

Past achievements for clients

• Mediating a volatile exit negotiation between a client and their service provider, resulting in a win-win outcome in which the relationship was rebuilt on a new, more sustainable basis, and the costs and operational disruptions of changing providers were avoided. 

• Overseeing a team that developed a new methodology for assessing IT cost structure for a major European insurance firm, which was implemented across the US, Europe and Asia.

• Benchmarking a major utilities client for their international IT operations, helping them understand their priorities for improvement in their transformation to an agile enterprise,.

What he does at ISG

Lyonel Roüast has both seen and been actively involved in the IT market’s global growth from the beginning. With 22 years as a consultant—which has included doubling the size of the ISG advising team in SEMEA—paired with 15 years as a service provider, he continues to help his clients build more efficient, productive and powerful technology services ecosystems.

Past achievements for clients

An unwavering and adaptive ally to manufacturing and banking clients alike, Lyonel sees himself as the familiar face of ISG in France, taking care to cultivate deep, multi-decade relationships with ISG’s top clients in the region. He ensures that ISG’s presence, in addition to his own, becomes an integrated fixture throughout clients’ infrastructures and enterprises. Lyonel has achieved this, with examples in particular, by:

• Reviewing the IT ecosystem of a large food conglomerate which involved assessing the firm's sourcing strategy. Thorough analyses resulted in €60 Million+ cost savings, including renegotiation of major software contracts, several of them exceeding €100 Million a year. He and his team continue to manage governance for the whole IT ecosystem, ensuring the client elicits full value of their complex agreements, day in and day out.
• Helping a large international commercial banking company in France monitor their worldwide IT spend and quality, while considering all other business units like HR and service providers, and reduced costs by €50 Million+. Lyonel helped optimize their performance and rationalize their global IT ecosystem as well.