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John Callison Email & Phone Number

Principle (P5) Global Sourcing Manager Marketing and Sales Technology | Army Veteran | Workday Military and Veterans ERG Leader (Atlanta) at Workday
Location: Atlanta, Georgia, United States 16 work roles 3 schools
1 work email found @workday.com 10 phones found area 669, 650, 210, 714, 949, and 847 LinkedIn matched
✓ Verified July 2026 4 data sources Profile completeness 100%

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Current company
Role
Principle (P5) Global Sourcing Manager Marketing and Sales Technology | Army Veteran | Workday Military and Veterans ERG Leader (Atlanta)
Location
Atlanta, Georgia, United States
Company size

Who is John Callison? Overview

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Quick answer

John Callison is listed as Principle (P5) Global Sourcing Manager Marketing and Sales Technology | Army Veteran | Workday Military and Veterans ERG Leader (Atlanta) at Workday, a with 5 employees, based in Atlanta, Georgia, United States. AeroLeads shows a work email signal at workday.com, phone signal with area code 669, 650, 210, 714, 949, 847, and a matched LinkedIn profile for John Callison.

John Callison previously worked as Principle (P5) Global Sourcing Manager Sales and Marketing Technology at Workday and CEO and Founder at Over30Cosplay. John Callison holds Certificate Pmp, Project Management from Carnegie Mellon University.

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Email format at Workday

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{first}.{last}@workday.com
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Profile bio

About John Callison

SENIOR MANAGER, PROCUREMENT & SOURCING - TECHNOLOGYBuying & Procurement / Supplier Management / Cost Control / Performance AnalysisAccomplished, results-oriented leader, adept in all aspects of the supply chain, including sourcing, vendor selection, contract administration, and program management. Maintain collaborative partnerships and negotiate effectively with vendors, suppliers, and partners, directing efforts to control costs, maximize profitability, and achieve challenging financial objectives. Analytical performer, highly skilled in issue identification, corrective action planning, and risk mitigation. Ensure regulatory compliance and foster adherence to proven best practices. Articulate communicator and consensus-builder; collaborate extensively with project leaders and suppliers.Specialties: CORE COMPETENCIES• Logistics & Supply Chain Expertise• Sourcing & Procurement Operations• Cost Analysis / Expense Reduction• Complex Contract Negotiations • Solicitation & Bidding Management• Demand Evaluation & Forecasting• Project Planning / Management• Team Building, Training & Mentoring

Listed skills include Strategy, Management, Strategic Sourcing, Vendor Management, and 35 others.

Current workplace

John Callison's current company

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Workday
Workday
Principle (P5) Global Sourcing Manager Marketing and Sales Technology | Army Veteran | Workday Military and Veterans ERG Leader (Atlanta)
6230 Stoneridge Mall Road, Pleasanton, CA 94588, us
Website
Employees
5
AeroLeads page
16 roles

John Callison work experience

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Principle (P5) Global Sourcing Manager Sales And Marketing Technology

Current

Pleasanton, California, Us

Feb 2021 - Present

Ceo And Founder

Current

San Jose, California, Us

Over30Cosplay is a global advocacy group started in 2014 with 157 members. We now have over 67,000 members in 45 countries with a mission dedicated to promote, support, provide and encourage cosplayers over from 30 to 90 years old feel comfortable expressing themselves through costume and cosplay art forms. This is displayed routinely in convention, social media, and event settings. We offer an informative and supportive, "safe place" to discuss and collaborate on sensitive issues specifically related to cosplayers between the ages of 30-90 years old. Page contributions will include celebrating the history of comic culture related to Over30Cosplayers, couple cosplay ideas, combating negative comments related to age, tips on costume choices flattering to our community, artistic and cultural costume choices, promoting our cosplay members, incorporating retro ideas and genres, dating and family in the community, social media/marketing awareness for older cosplayers and how to combat bullying in the community. Our page addresses real issues to prepare, celebrate and assist Over30 cosplayers and costumers to feel confident, engaged and motivated! This page and our ever growing group encourages cosplayers to enter the costuming community prepared and ready to contribute to the popular art form and culture we embrace called cosplay! Our community connects 90,000 total Cosplayers in 45 countries and continuously strives to grow, reaching out to new members through such opportunities as panel discussions, group meet ups, events, and online media support.

Oct 2014 - Present

Advisory Board Member

Current

San Jose, California, Us

Quarterly Advisor to Board on K9 Tactics and Training

May 2022 - Present

Commissioner

San José, Ca, Us

Arts and Entertainment Commissioner District 6

Jun 2020 - Jun 2022

Commissioner

San José, Ca, Us

City of San Jose Parks and Recreation Commissioner District 6 (Yes I am now in a sitcom) lol - No my day job didn't change this is a add on

Jan 2017 - Jun 2020

Senior Manager, Procurement & Sourcing - Technology

San Jose, California, Us

May 2018 - Jun 2019

Sourcing Manager

Lead negotiator for Corporate Network Hardware, Additionally Support Oculus and Facebook Video negotiations

Aug 2016 - Apr 2018

Principal

Supernova Spirits - Marz Vodka

Original CSO and Junior Principal of 3 No longer work with team but still a Principle (current)The Marz Vodka journey began several years ago from a tight-knit group of spirit enthusiast friends who loved making exquisite cocktails and experiencing super premium spirits. A group of enthusiasts born with these same dynamic minds and love of all things perfectly experienced. At its most essential, Marz Vodka is a story of friends in search of enjoying world-class vodka. We are the new generation of vodka connoisseurs, and our passion for the pursuit of spirits excellence was big enough to share with the world. So, after asking ourselves if it was possible to share our dream, we decided to do it ourselves, by distilling a world-class vodka, in a world-class bottle, at a price everyone can enjoy.

Mar 2015 - 2018

Brand Marketing

Chicago, Il, Us

Feb 2015 - Dec 2016

Senior Manager, Global Strategic Sourcing For Technology (Data Centers)

Walldorf, Bw, De

Jun 2012 - Mar 2015

Netapp It Telecom And Networks Global Strategic Sourcing Manager

San Jose, California, Us

NETAPP (consultant), Sunnyvale, CaliforniaIT Global Sourcing & Supply (GSS) Manager, Telecom & Networks, 1/2011 to 12/2011Led GSS efforts within $3.9B infrastructure / server technology provider, managing IT commodity operations across vendor research, RFX development, contract negotiation, and supplier relationship management for networking and telephony. Analyzed costs, developed effective control / avoidance strategies, and forged contract performance management frameworks. Oversaw contractor resources and offshore teams in India.  Delivered a $57M annual savings across 28 contracts, through aggressive contract and price negotiation. Produced 16 RFP submissions, including a $60M global hardware acquisition. Developed mastery across an array of billing platforms to perform cost analysis; utilized Dunn & Bradstreet credit analysis reporting to enhance sourcing decisions.

Jan 2011 - Apr 2012

Senior It Commodity Manager (Telecom / Networks)

Austin, Texas, Us

Directed strategic global sourcing and procurement, leading multiple concurrent efforts. Ensured contract alignment with program quality, delivery, responsiveness, and cost requirements. Managed vendor relationships with AT&T, Sprint, TATA, Cisco, and Intercall for voice/data circuits, local long distance telephony, and audio/video conferencing. Assessed and reported on budgeting, cost tracking, and performance against key indicators. Negotiated complex contract terms and conditions. Trained, coached, and supervised junior buyers; provided contract development and negotiation mentoring.Drove an overall savings of $7.5M per year, spanning 5 functional areas, through insightful cost-avoidance and price negotiation, achieving nearly 40% of the $19M departmental savings goal.Designed and distributed RFP, RFX, and RFQ materials, selecting best-fit suppliers and negotiating both standard/non-standard contracts for optimum pricing.Aligned all efforts to best practices and conducted evaluation of vendor metrics to ensure adherence to service level agreements (SLA) and industry standards, as well as identified areas for improvement.

Sep 2007 - Dec 2010

19D/97B/351B

Arlington, Virginia, Us

USA, USAR, USNG19D - Armored Reconnaissance Specialist- Eyes and ears on the field, gather information about enemy positions, vehicles, weapons, and activity. Engage the enemy in the field, track and report their activity, and direct the employment of weapon systems to their locations. - Obtained and reported vital combat and battlefield information on the enemy and on combat circumstances and environmental conditions.- Planned and performed weekly training on weapons, explosives, tactical movement formations, radios and combat life saving skills.- Assisted the chain of command in planning, organizing, directing, supervising and coordinating combat missions and training events.- Trained to lead infantry team into combat operations, tactical and technical guideline to support both superiors and subordinates.- Planned, organized and directed the functions and soldiers of a small sized organization during combat and peacekeeping missions.97B - Job Description Available upon request351B - Job Description Available upon request

Jan 1988 - Jan 2008

Senior Operations Analyst & Telecom Engineer Iii

South San Francisco, California, Us

Played instrumental role in all voice-related initiatives and managed existing telecommunications infrastructures and contracts, supporting nationwide corporate staff. Led complex acquisition activities, including sourcing, negotiation, and delivery, serving the entire life of the contract. Liaised extensively among internal and third-party vendor stakeholders, facilitating ongoing service improvements and cost reductions; implemented benchmarking and metric tracking to enable accurate performance reporting.Researched, evaluated, recommended, and implemented new technologies for improved expense avoidance and corporate communication infrastructure; provided subject-matter expertise to inform requirements for new initiatives.Developed and led communication system training for staff; investigated security and alleged fraud incidents.Held collateral roles of Conference Services Manager and Disaster Communications Engineer, leveraging training and expertise as a Certified Business Continuity Professional (CBCP).

Aug 2002 - Jun 2007

Technology Manager Telecom And End User Engineering -

Atlanta, Ga, Us

Led telecommunications program, providing in-depth cost analysis for overall corporate communications. Processed and evaluated invoices, managed vendors, administered PBX, voice mail, and cellular systems, and programmed call routing. Purchased telephone devices.Routinely identified and secured service improvements and substantial cost-savings. Performed forward-focused usage forecasting and budgetary estimation; played a key role in short- and long-range telecommunication strategy development focused on technology acquisitions.

Feb 2001 - Mar 2002

Assistant Director Of Network And Telecom Services

Schwinn Bicycles / Gt Bicycles

MIS operations, Managing PC, Network, and Telecom groups across 11 locations and spearheading strategic MIS projects and initiatives. Administered networks and telecom systems, directing installation, configuration, and administration of data and voice networking hardware / software; administered Switchview IntelControl, OrderPro, RightOnQue, Nortel Meridian PBXs, MM1, Meridian Mail, and Novell LAN/WAN. Installed digital TV and video conferencing networks.Signing Authority for $500K - ~

May 1998 - Feb 2001
Team & coworkers

Colleagues at Workday

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3 education records

John Callison education

Certificate Pmp, Project Management

Carnegie Mellon University

Certificate, Business Continuity

Stanford University

Associate Of Arts, Administration Of Justice

Goldenwest College
FAQ

Frequently asked questions about John Callison

Quick answers generated from the profile data available on this page.

What company does John Callison work for?

John Callison works for Workday.

What is John Callison's role at Workday?

John Callison is listed as Principle (P5) Global Sourcing Manager Marketing and Sales Technology | Army Veteran | Workday Military and Veterans ERG Leader (Atlanta) at Workday.

What is John Callison's email address?

AeroLeads has found 1 work email signal at @workday.com for John Callison at Workday.

What is John Callison's phone number?

AeroLeads has found 10 phone signal(s) with area code 669, 650, 210, 714, 949, 847 for John Callison at Workday.

Where is John Callison based?

John Callison is based in Atlanta, Georgia, United States while working with Workday.

What companies has John Callison worked for?

John Callison has worked for Workday, Over30Cosplay, K9 Security K9 X-Factor, City Of San José, and Symantec.

Who are John Callison's colleagues at Workday?

John Callison's colleagues at Workday include Adriana Lukasik, Sareetha Amujala, Daniel Adamenko, Silviya Dimitrova, and Jason Cundick, Mba, Phr.

How can I contact John Callison?

You can use AeroLeads to view verified contact signals for John Callison at Workday, including work email, phone, and LinkedIn data when available.

What schools did John Callison attend?

John Callison holds Certificate Pmp, Project Management from Carnegie Mellon University.

What skills is John Callison known for?

John Callison is listed with skills including Strategy, Management, Strategic Sourcing, Vendor Management, Leadership, Program Management, Contract Negotiation, and Integration.

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