John Callison — CEO
I’m a Senior Advisor and Principal Sourcing Executive who treats procurement as a financial‑engineering discipline. Across 20 years at Workday, Meta, Oracle, and SAP Cloud, I’ve turned nine‑figure technology contracts into competitive advantage through forensic commercial analysis, contract architecture, and systems‑level thinking across cloud, data‑center, and emerging space‑infrastructure ecosystems. How I create value: • Financial Engineering — bespoke strategies for $100M+ ELAs, cloud commitments, and platform agreements that deliver durable savings and eliminate vendor lock‑in. • Strategic Restructuring — rebuilding legacy agreements, governance frameworks, and P2P workflows to unlock operational velocity for Engineering, Finance, and Infrastructure teams. • Advisory Leadership — supporting investor, operational, and national‑security councils on diligence, infrastructure strategy, supply‑chain resilience, and frontier‑technology assessments. Quantified Impact: • 37% savings on Workday’s $148M Salesforce SELA • 26% portfolio reduction at Meta through contract audits • 50% cycle‑time reduction via enterprise process re‑engineering • $2B+ in cumulative contract value delivered across cloud and infrastructure portfolios Beyond enterprise sourcing, I write and speak on orbital and lunar data‑center supply chains, space‑rated logistics, and the governance models required for emerging off‑planet compute. My work in SpaceNews has been cited across academia, government, and national space agencies, with my second op‑ed appearing in the March 2026 print edition. I bridge terrestrial data‑center economics with space‑rated supply‑chain and governance architecture, advise Perfero, ASC, and other NDA‑bound organizations, and serve as a member of the Space Force Association. I also support a private‑equity platform on portfolio‑level infrastructure, cloud strategy, and commercial architecture, with formal onboarding underway.
Stackforce AI infers this person is a strategic sourcing expert in technology and infrastructure sectors.
Location: Duluth, Georgia, United States
Experience: 36 yrs 8 mos
Skills
- Portfolio Sourcing Strategy
- Supply Chain Resilience
- Emerging Technologies
- Technology Due Diligence
- Financial‑engineering Procurement Strategy
- Strategic Sourcing & Negotiation
- Dual‑use Technology Strategy
- Executive Advisory
- Technology Sourcing
- Contract Negotiation
- Strategy
- Digital Strategy
- Customer Relationship Management (crm)
- Finance
- Operations Management
Career Highlights
- Delivered over $2B in cumulative contract value.
- Achieved 37% savings on a $148M Salesforce SELA.
- Recognized in the top 5% of global performers for excellence.
Work Experience
Private Equity – Portfolio Advisory (Confidential)
Senior Advisor - Portfolio Sourcing & Supply Chain Strategy (Private Equity) (2 mos)
ASC
Member, Abelian Security Council (3 mos)
Perfero Advisory LLC
Strategic Advisor (5 mos)
Culture Grid HR
Strategic Advisor – Sourcing & Vendor Strategy (8 mos)
K9 Security K9 X-Factor
Advisory Board Member (2 yrs 3 mos)
Workday
Sr. Global Strategic Sourcing Manager (Technology) (2 yrs 9 mos)
Principal (P5) Global Sourcing Manager Sales and Marketing Technology (5 yrs 10 mos)
Global Strategic Sourcing Manager (Technology) (1 yr 6 mos)
City of San José
Commissioner (2 yrs)
Commissioner (3 yrs 5 mos)
Symantec
Senior Manager, Procurement & Sourcing - Technology (1 yr 1 mo)
Meta Facebook
Sourcing Manager, Strategic Operations Engineering (CorpNet / DataCenters) (1 yr 8 mos)
Supernova Spirits - Marz Vodka
Principal, Fractional CSO / CMO, (2 yrs 10 mos)
Chicago Cubs
Corporate Partnerships (1 yr 10 mos)
Over30Cosplay
Founder (9 yrs 3 mos)
SAP Cloud
Senior Manager, Global Strategic Sourcing for Technology (Data Centers) (1 yr 7 mos)
Global Strategic Sourcing Manager ( All IT / Technology for SuccessFactors) (1 yr 2 mos)
NetApp
NetApp IT Telecom and Networks Global Strategic Sourcing Manager (1 yr 3 mos)
Oracle
Senior IT Commodity Manager (Telecom / Networks) (3 yrs 3 mos)
GENENTECH, INC
Senior Operations Analyst & Telecom Engineer III (4 yrs 10 mos)
The Coca-Cola Company / Minute Maid Odwalla
Technology Manager Telecom and End user Engineering - (1 yr 1 mo)
GT Bicycles
Assistant Director of Network and Telecom Services (2 yrs 9 mos)
US Army
19D/97B/351B (14 yrs)
Education
PMP at Carnegie Mellon University
Associate of Arts at Goldenwest College
Business Continuity Disaster Recovery at Stanford University