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Mark Oshima Email & Phone Number

Trusted Advisor | Growth Leader | Change Expert | Talent & Health Strategist | Synthesizer at AMISO LLC
Location: Irvine, California, United States 18 work roles 3 schools
1 work email found @privatehealth.com 3 phones found area 317 and 312 LinkedIn matched
✓ Verified May 2026 4 data sources Profile completeness 100%

Contact Signals · 1 work email · 3 phones

Work email m****@privatehealth.com
Direct phone (317) ***-****
LinkedIn Profile matched
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Current company
AMISO LLC
Role
Trusted Advisor | Growth Leader | Change Expert | Talent & Health Strategist | Synthesizer
Location
Irvine, California, United States

Who is Mark Oshima? Overview

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Quick answer

Mark Oshima is listed as Trusted Advisor | Growth Leader | Change Expert | Talent & Health Strategist | Synthesizer at AMISO LLC, based in Irvine, California, United States. AeroLeads shows a work email signal at privatehealth.com, phone signal with area code 317, 312, and a matched LinkedIn profile for Mark Oshima.

Mark Oshima previously worked as Managing Partner at Oshima Advisory and Chief Revenue Officer & Executive Vice President, Health Solutions at Private Health Management. Mark Oshima holds Mba from Ucla Anderson School Of Management.

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Email format at AMISO LLC

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{first_initial}{last}@privatehealth.com
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Profile bio

About Mark Oshima

I'm a senior executive and advisor with experience and passion for helping leaders and investors grow their companies, lead their teams and change their organizations. Over the course of my career, I've had the privilege of leading P&Ls, sales, account management, consulting practices and functional teams. I've worked in large global organizations and small growth companies and advised companies as large as the Fortune 10 as well as those in the earliest stages of funding. This multi-faceted experience enables me see patterns as they are developing and synthesize disparate pieces of information to solve problems with practical solutions. I have a BA in Economics from the University of California, Irvine (go Anteaters), and a MBA from the University of California, Los Angeles (Go Bruins). I also completed the Pinnacle Senior Executive Program at the University of Chicago. I live in Irvine, California and my most important roles are being a husband to my wife, Stacie and a father to my three teenage sons.

Listed skills include Change Management, Strategy, Organizational Design, Mergers And Acquisitions, and 1 others.

Current workplace

Mark Oshima's current company

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AMISO LLC
Amiso Llc
Trusted Advisor | Growth Leader | Change Expert | Talent & Health Strategist | Synthesizer
Irvine, CA, US
18 roles · 33 years

Mark Oshima work experience

A career timeline built from the work history available for this profile.

Role listed

Amiso Llc

Irvine, CA, US

Managing Partner

Current
Oshima Advisory

Advisory services in M&A, Organization Change and Talent Strategy

Mar 2024 - Present

Chief Revenue Officer & Executive Vice President, Health Solutions

Los Angeles, California, US

Dec 2021 - Dec 2023

Executive Vice President Of Enterprise Solutions

Los Angeles, California, US

Private Health Management's team of clinical, research and care management experts provide unparalleled access to the best doctors, diagnostics, and treatments to find the best of what’s possible in medicine. From routine and preventative care to serious or complex conditions, our integrated clinical approach and proprietary resources deliver more accurate.

Jun 2020 - Dec 2021

Advisor

Mountain View, California, US

May 2020 - May 2021

Chief Partnerships Officer

Mountain View, California, US

Sep 2019 - Jun 2020

Partner Happiness Executive

Mountain View, California, US

Responsible for developing strategic partnership strategy for extending Humu's impact and reach across markets and customers

Mar 2019 - Jun 2020

Global Managing Partner, Strategic Advisory Practice

Aon

London, GB

  • Responsible for driving Strategic Advisory practice global strategy, P&L and firm-wide sales for M&A, Total Rewards, Human Capital Strategy and Strategic Communications service lines. Led a global team of senior.
  • Achieved margin expansion of > 2000 basis points
  • Exceeded Total Revenue (Direct Revenue + Enterprise Sales) goal 3 out of 4 years
  • Delivered NPS of 73%, highest among Aon’s human capital consulting practices
  • Achieved top quartile “Engaging Leader Score” (86) and improved global team engagement by 28 points
  • Served on Aon Hewitt Executive Committee (governing body for Aon Hewitt business unit) and Aon Executive Leadership Team (Top 150 Senior Leaders across Aon)
Sep 2014 - Aug 2018

Healthcare Exchanges Business Effectiveness Leader

Aon

London, GB

  • Responsible for working with Aon Healthcare Exchanges leaders to develop and execute a strategy and business reorganization plan that achieved the significant growth potential of the private healthcare exchange market..
  • Worked with CEO and other senior Aon leaders to build five-pillar strategy and operating plan
  • Completed business effectiveness assessment, including comprehensive review of strategy, operations and organizational capability; assembled and managed cross functional team to develop specific change recommendations.
  • Developed recommendations for accountabilities and governance for the Exchange value chain
Jan 2014 - Aug 2014

Global Head Of Talent

Aon

London, GB

  • Developed and executed Aon Hewitt’s Global Talent strategy for 29,000 employee business unit across both consulting and outsourcing divisions. Also executed ongoing operational talent processes including annual talent.
  • Established Aon Hewitt’s Talent function; hired Talent leaders for respective outsourcing and consulting divisions, who each built their organizations
  • Developed integrated talent strategy across outsourcing and consulting divisions; worked with business strategy leader that aligned talent strategy embedded within the annual long-range planning process
  • Key leader involved in rolling out new Aon Hewitt Mission and Vision to all 29,000 global employees
  • Co-led planning team for Annual Aon Hewitt Leader Forum—first of its kind business-wide leadership experience for Top 150 Aon Hewitt senior executives
Jan 2013 - Dec 2013

Lead Hr Business Partner For Client Solutions And Strategy

Aon

London, GB

  • Served as strategic advisor to President of Client Solutions and Strategy in addition to Chief Commercial Officer on strategic human capital and organization issues for this global function. Scope of the Client.
  • Worked directly with President of Client Solutions and Strategy on transformation plan
  • Partnered with Chief Commercial Officer to develop advisor capability model; initiated competency assessment process for all colleagues within market facing roles in the Commercial function
  • Led all ongoing HR processes for the Client Solutions and Strategy function
Jan 2013 - Dec 2013

Senior Vice President, Business Integration, Office Of The Ceo

Aon

London, GB

  • Responsible for final stages of business, organization and cultural integration of Aon’s $4.9B acquisition of Hewitt Associates. Was member of the Office of the CEO—core team responsible for working with Aon Hewitt CEO.
  • Executed business stabilization plan in transition to “Co-CEO Model” in mid-2011. In following year, transitioned to single CEO model in Q2 2012. Consistently exceeded financial performance targets
  • Led change management work stream to move $670M Health & Benefits business to Risk Solutions
  • Led creation and management of internal change management plan for redomicile of Aon Corporate Headquarters from the United States to the United Kingdom
  • Served on core team that designed and socialized new Aon Hewitt Mission / Vision
  • Worked with other members of the Office of the CEO to assemble and coordinate monthly governance forums and reporting cadence for Aon Hewitt Executive Committee, annual strategic planning process
Jul 2011 - Dec 2012

Senior Vice President, Aon Merger & Acquisition Solutions

Aon

London, GB

  • Member of Global Aon Merger and Acquisition Solutions Leadership Team responsible for selling and leading large, complex client engagements while maintaining senior level relationships with key clients. Key architect.
  • One of three leaders who established Aon Consulting’s Aon Merger & Acquisition Solutions team
  • Sold 3 of the 5 largest integrated assignments for the practice in its first two years
  • Established ongoing client partner relationship with one of the world’s leading acquirers
  • Architected practice model in APAC; managed lead partner who built in-region leadership team
  • Served as lead M&A human capital consultant to Aon’s acquisition of Hewitt Associates
Jan 2009 - Jun 2011

West Region Leader

Libertyville, Illinois, US

West Region Leader for Exequity, LLP, a senior advisory firm focused on mergers and acquisitions, executive compensation and other strategy human capital issues. Responsible for developing the west region market while also serving as a national expert on human capital aspects of M&A and HR strategies.

Sep 2007 - Dec 2008

Business Strategy Leader

London, GB

Responsible for evaluating and recommending long-term growth markets for the outsourcing business segment. Also responsible for assessing organizational capabilities required to execute on those growth opportunities

Aug 2006 - Jul 2007

Change Management Practice Leader

London, GB

Responsible for global change management practice within the company's HR outsourcing business. Included designing business process outsourcing specific change management model and leading a team of consultants who led change assignments for global clients.

Jan 2005 - Jul 2006

Partner, Corporate Restructuring And Change Practice

London, GB

Member of Global Leadership team for Corporate Restructuring (M&A, Restructuring, Divestitures) practice. Responsible for global post merger integration solution that crossed multiple practice lines.

2000 - 2004 ~4 yrs

Senior Consultant

Aon

London, GB

Lead consultant on HR Re engineering, competency development, organization design and performance management engagements.

1993 - 1999 ~6 yrs
3 education records

Mark Oshima education

Mba

Ucla Anderson School Of Management

Pinnacle Senior Executive Program

University Of Chicago

Ba, Economics

Uc Irvine
FAQ

Frequently asked questions about Mark Oshima

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

What company does Mark Oshima work for?

Mark Oshima works for AMISO LLC.

What is Mark Oshima's role at AMISO LLC?

Mark Oshima is listed as Trusted Advisor | Growth Leader | Change Expert | Talent & Health Strategist | Synthesizer at AMISO LLC.

What is Mark Oshima's email address?

AeroLeads has found 1 work email signal at @privatehealth.com for Mark Oshima at AMISO LLC.

What is Mark Oshima's phone number?

AeroLeads has found 3 phone signal(s) with area code 317, 312 for Mark Oshima at AMISO LLC.

Where is Mark Oshima based?

Mark Oshima is based in Irvine, California, United States while working with AMISO LLC.

What companies has Mark Oshima worked for?

Mark Oshima has worked for Amiso Llc, Oshima Advisory, Private Health Management, Humu, and Aon.

How can I contact Mark Oshima?

You can use AeroLeads to view verified contact signals for Mark Oshima at AMISO LLC, including work email, phone, and LinkedIn data when available.

What schools did Mark Oshima attend?

Mark Oshima holds Mba from Ucla Anderson School Of Management.

What skills is Mark Oshima known for?

Mark Oshima is listed with skills including Change Management, Strategy, Organizational Design, Mergers And Acquisitions, and P&L Management.

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