The authors of »SAP Ariba«

Justin Ashlock

Photo of Justin Ashlock
Justin Ashlock has spent over half of his more than 20-year career in technology with SAP America, joining SAP’s Professional Services organization in 2005, serving eventually as a platinum consultant, and then as the practice engineer for hundreds of global SAP customer projects and engagements supporting over $100 billion in procurement and logistics activities and pursuits worldwide. In 2013, Justin began managing the SRM cloud practice for SAP North America, focusing on SAP Ariba, SAP S/4HANA Sourcing and Procurement, Materials Management, SAP Supplier Relationship Management (SRM), as well as SAP CLM and Sourcing. Since 2018, Justin also serves as the global practice lead for SAP’s procurement solutions in parallel. 
Justin is also a longtime SAP PRESS author, having published two books (SAP S/4HANA Sourcing and Procurement and SAP Ariba and SAP Fieldglass: Functionality and Implementation), as well as two procurement chapters as a contributing author in Discover SAP, 3rd edition and an e-Bite entitled Introducing Central Procurement for S/4HANA. Justin holds a Bachelor’s Degree from the University of California, Berkeley, and a Master’s Degree in Business Administration from the University of Notre Dame. He resides in Chicago with his wife and two young sons.

Rachith Srinivas

Photo of Rachith Srinivas
Rachith Srinivas has spent more than 15 years in technology with more than 12 years in SAP America, joining SAP’s Professional Services organization in 2007, serving eventually as a platinum consultant in the SAP SRM practice. Since 2007, Rachith has been implementing and leading complex SAP procurement projects globally and has worked as a trusted advisor in this space on many strategic SAP accounts.
Rachith has a Master of Business Administration degree from McCombs School of Business at UT Austin and a Master of Science in Software Engineering. Prior to joining SAP as a functional consultant, Rachith worked as an architect and lead programmer, working on developing complex J2EE based solutions for verticals including health, insurance, and finance. In addition, Rachith is also a prior SAP PRESS author, having published a book on SAP Ariba. He resides in Dallas with one son.
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Current titles

  • Cover of Introducing Central Procurement with SAP S/4HANA

    Introducing Central Procurement with SAP S/4HANA

    Justin Ashlock, Peter Paschert, Armin Schuster

    89 pages

    SAP S/4HANA is the new hub for centralized procurement! Explore how SAP S/4HANA 1809 centrally manages requisitioning, purchasing, and contract management. Learn how you can tap into central analytics to gather actionable data about your procurement process. Central procurement is More about the book



    • Explore centralized procurement with SAP S/4HANA
    • Walk through central requisitions, contract management, and purchasing
    • Consider implementation options to connect your ERP systems
  • Cover of Sourcing and Procurement with SAP S/4HANA

    Sourcing and Procurement with SAP S/4HANA

    Justin Ashlock

    716 pages, hardcover

    Your comprehensive guide to SAP S/4HANA sourcing and procurement is here! Get step-by-step instructions to configure sourcing, invoicing, supplier management and evaluation, and centralized procurement. Learn how to integrate SAP S/4HANA with SAP Ariba, SAP Fieldglass, and more. Then, expertly More about the book

    from $79.99


    E-book | Print edition | Bundle
    • Configure purchasing, sourcing, invoicing, evaluation, and more
    • Run your sourcing and procurement processes in SAP S/4HANA
    • Analyze your procurement operations
  • Cover of SAP Ariba

    SAP Ariba

    Rachith Srinivas, Matthew Cauthen

    690 pages, hardcover

    This is your comprehensive guide to SAP Ariba: implementation, configuration, operations, and integration! Get step-by-step instructions for each functional area, from contract and invoice management to guided buying and beyond. See how each SAP Ariba application fits into your procurement More about the book

    from $79.99


    E-book | Print edition | Bundle
    • Deploy SAP Ariba for supplier relationship management
    • Configure SAP Ariba applications with step-by-step instructions
    • Run your procurement processes in SAP Ariba Sourcing, SAP Ariba Contracts, Ariba Network, and more