About Us

Since its founding in 2003, The Sierra Institute (TSI) has been pursuing a simple Vision – to provide a safe place for top HR leaders to hone their craft and form powerful relationships. This idea arose out of the simple recognition that CHROs face truly lonely circumstances – who are you supposed to go to for help when you most need it? TSI primarily fulfills this Vision by hosting 2 meetings each year, in wonderful locations around the US.


Throughout its history, TSI has fulfilled its Vision by focusing on 3 things – Great People, Great Content, and Great Relationships. We invite and attract whole People; people who are balanced with broad and varied interests. We trust and promote the creation of powerful ideas and supportive Relationships, relationships that are fostered 365 days a year. We actively seek out speakers who provide thought-provoking ideas that fuel Content-rich discussions.


The power and value of TSI is most singularly realized through the quality of its members, who we refer to as “Senior Fellows”. “Senior” because we only have the senior-most HR leaders, those who are most accountable for their organization’s human capital strategies; and “Fellows” because, at its core, TSI is all about learning and evolution, conceptually similar to think tanks.


In evaluating a potential Fellow, we look for a leader who:

• Is the HR leader of a stand-alone company (public or private), or of a large Business Unit;
• Is pursuing a robust human capital strategy;
• Has a history of delivering unique value to her/his organization;
• Shares our Values and is a “whole” person.


Our membership is limited to no more than 50 Senior Fellows. Collectively our members have responsibility for leading the human capital agendas for organizations employing over 400,000 employees, doing business in 65 countries, and have 840 years of experience in #1 HR roles.


If you would like to learn more about TSI, go the “contact us” tab.

The Sierra Institute Leadership

Bob Ryan

Michael Keane

Theo Killion

Courtney B. Murtaugh

The Sierra Institute Advisors

Wendy Boswell

The Sierra Institute Members

Vivek Arora

Tamara L. Bray

Andrea J. Barry

Jeff Childs

Kim Coldiron

Liz Evans

Caskie Lewis-Clapper

Anastasia Falconio

Gail Forrest

Larry Fultz

Maurice Harapiak

Margie Harris

Keagan Kerr

Sean Kimble

Rochelle Krombolz

Deon MacMillian

Wayne A. Luce

Christine M. Michel

Katie Lawler

Toyin Ogun

Tim Paige

Brian R. Powers

Ed McCann

George Powers

Mahesh R. Puducheri

Melinda Reeves

Laura Ramey

Whitney Shelley

Carol Summersgill

Michelle Tenzyk

Nancy Tostanoski

Robert H. Sims

Elizabeth Wood


Vivek Arora

Vivek currently serves as Chief Administrative Officer and General Counsel for Mears Group, Inc.  In this role, Vivek oversees several administrative functions, including human resources, legal, safety, and quality.  Mears Group, along with its affiliated companies, provides a comprehensive scope of oil and natural gas infrastructure services including transportation, logistics and construction.   Our companies’ services include pipeline construction of any length and diameter, underground capabilities providing support for gas and electric distribution, horizontal directional drilling, pipeline integrity management, engineering services, and trenching.  Vivek has over 10 years of experience in human resources and related fields.  Vivek joined Mears in June 2015 and is based in Houston, Texas.  Vivek has been a Senior Fellow of TSI since 2014.

Last 1-3 HR Leadership Roles (Company – Title – Yrs)

  1. Mears Group, Inc. – Chief Administrative Officer and General Counsel (2015-present)
  2. Quanta Services, Inc. – Head of HR (2012-2015)


  • Bachelors’ – University of Pennsylvania, B.A.
  • Doctorate – Columbia Law School, J.D.
  • Master’s –  Rice University, M.B.A.

Personal &/or Professional Affiliations

  • Corporate Boards/Advisory Groups –
  • Non-Profit Boards – Career and Recovery Resources, Inc.
  • Personal Advocacy Interests –

Areas of Expertise: (e.g. labor, compensations, comp committee. Board management)

Compensation, People Development, Training, Labor and Employee Relations

Tamara L. Bray

Tamara Bray is Group Vice President and Chief Human Resources Officer for DCP Midstream, “one of the largest producers of NGLs and one of the largest natural gas processing companies in the U.S.” DCP gathers and/or processes about 12% of our nation’s gas supply. Since joining DCP in 2014, Tamara has had positions of increasing responsibility. She currently leads employee and organizational development, talent management, culture change, compensation and benefits. She also leads corporate real estate and facilities management. With over 20 years of human resources management at leading companies like Ford Motor Company, Bechtel Corporation, Dana Holding and Molson Coors prior to joining DCP, Tamara is a broad based manager with a strong international background. Tamara lives in Denver and is a Purdue Boilermaker.

Liz Evans

Liz Evans currently serves as CHRO for TETRA Technologies Inc. TETRA is comprised of diverse global businesses including oil & gas services and chemical manufacturing. Additionally, TETRA is general partner of a compression manufacturing and services MLP. The combined businesses operate on five continents with approximately 3000 employees.
Her current responsibilities at TETRA include managing the Human Resources and corporate communications functions.

With 30 years of broad-based experience in the field, Liz’ areas of special interest include talent identification and development, building high performance teams, coaching and compensation design with a focus on executive compensation and Compensation Committee interface.

Prior to TETRA, Liz served in HR executive leadership roles at Boardwalk Pipeline Partners and Atlanta Gas & Light Resources (now Southern Company) and in various roles at Accenture, ARAMARK and Amoco (now BP).
Liz holds a Master’s Degree in Economics from Indiana University and received a Bachelor’s Degree in Economics from Indiana State University.

Liz is new to The Sierra Institute, joining in June 2019.

Caskie Lewis-Clapper

As chief human resources officer, Caskie Lewis-Clapper is accountable for the evolution of Magellan’s strategic workforce capability. With more than 25 years of experience in organization development and human resources, she has extensive experience in leading organizational transformations, championing large-scale change and shaping culture to align with business strategy.

Prior to joining Magellan, Lewis-Clapper served as senior director for human resources operations for Helix Health (Medstar), a Baltimore-based healthcare system. At Helix, Lewis-Clapper held a variety of senior leadership positions, including senior director of human resource operations and director of training and organizational development. Prior to joining Helix, Lewis-Clapper was a consultant with General Physics Corporation, providing training and performance improvement consulting services, and conducting human performance improvement research. She is a published author of articles on team building and human performance improvement.

Lewis-Clapper received her bachelor’s degree from the University of Maine and her master’s degree from Johns Hopkins University. She is an alumna of the Johns Hopkins Fellows in Change Management program and serves as a member of the Board for the Organizational Design Forum.

Anastasia Falconio

Anastasia Falconio has been Chief People Officer at Kids ll since January 2017. Kids ll is a private company that has has been “inventing and reinventing baby toys and gear for over 40 years.” With award winning brands like Baby Einstein, Bright Starts, Oball, Ingenuity, and Disney Baby, chances are you’ve had one of the Kids ll products in your home. A lawyer by training, Anastasia has been leading human resources functions domestically and internationally for over 20 years. Her skill and capability has been demonstrated in diverse assignments at Caesars, Harrah’s, Caterpillar and American Girl. Anastasia lives in Atlanta and is an Illini from University of Illinois.

Larry Fultz

At the time of their sale in March 2017 to Sycamore Partners, Larry was the EVP and Chief Operating Officer for The Limited, a 256 store $450M in sales specialty retail business.  Larry was responsible for all Stores, Stores Operations, Real Estate and Construction, and Human Resources. In November, 2017 Larry assumed responsibility for Marketing and the $120M E-Commerce Channel. He joined the Limited in 2014 as SVP and CHRO for the company.

Prior to The Limited, Larry was the SVP and CHRO for Vanguard Health Systems, a $6 Billion dollar Healthcare company based in Nashville, TN. Larry assisted in taking Vanguard public in June, 2012 and help guide the company through its sale to Tenet Health in October, 2014

Other top CHRO roles Larry has held include Victoria’s Secret/Pink (a$7B specialty retailer); Cintas (a $3B uniform and business services Company located in Cincinnati, OH); Lexis-Nexis (a $1.8B premier on-line legal information business located in Dayton, OH), as well as several HR roles with Whirlpool Corporation (the world’s largest appliance company, located in Benton Harbor, MI).

Larry has deep expertise in all areas of HR and has led major projects and strategic initiatives in the areas of: Organizational Design/Performance; Change Management; Succession Planning; Leadership Development; Training Curriculum Design; Compensation/Benefits Redesigns; and HR Systems Design and Implementation.

He has a long history of Leadership roles totaling over 38 years of business experience primarily in Human Resources, Business Operations and Accounting. Larry has both an MBA (’82) and a BS degree (’79) both in Business Administration from the University of Dayton. He serves on the New Albany, OH Chamber of Commerce and is a current member of The Sierra Institute, an organization of Chief HR Officers for major US and International corporations.

In the past he has served on the Corporate Advisory Boards for the University of Dayton and Xavier University. He has been a frequent guest lecturer at Miami of Ohio University, Vanderbilt, and The Ohio State University. He was a member for several years of the Health Management Academy HR Forum consisting of the top 50 healthcare companies in the United States and SHRM (the Society of Human Resources Management). He has spoken at numerous industry conferences on various topics including annual conferences for SHRM Executive Leadership Forum, AON/Hewitt, Towers/Watson, and Gallup.

Larry has been married for 37 years and has 3 grown children. He currently resides in Nashville, TN and maintains several business interests in Nashville, TN and Columbus, OH.

Keagan Kerr

Keagan Kerr is accountable for shaping the human capital, safety and training capabilities of Pacific Seafood to further enhance its industry leadership position throughout the United States & Canada.

Keagan joined Pacific Seafood in September 2016 from Coeur Mining, the largest U.S. based silver producer where he most recently held the position of Sr. Vice President, Corporate Affairs and Chief Human Resources Officer.

He has previous experience at Barrick Gold Corporation, and Zespri kiwifiruit holding various leadership positions in operations, community relations, marketing and continuous improvement. His global experience includes assignments in Africa, South America and Australia.

Keagan holds a Bachelor of Arts in Public Relations and Communication from Florida Southern College and a Master of Arts in Organization Leadership from Gonzaga University. He has served as an Executive Board Member for Meyvn Global, advising the company on talent strategy and public affairs and was named a “Top 25 HR Executive under 40” by Workforce Magazine. He has been a member of TSI since 2013.

Keagan  is currently based in Portland, OR

Wayne A. Luce

Mr. Luce is the newly appointed Vice President of People for Amsted Industries. In this role Mr. Luce will join Amsted’s leadership team and will head up all Human Resources initiatives throughout the organization.

Previously, Mr. Luce was Vice President of Human Resources and Environmental Affairs for Amsted Rail.  In this role, he was responsible for the strategy, design and ongoing management of HR programs focused on talent management, labor relations, talent acquisition, compensation, and benefits.  He was also responsible for strategic HR consultation with business leaders, payroll, safety, environmental services and employee relations, which includes the delivery of HR services to employees and managers.

Previously, Mr. Luce was Vice President Human Resources & Safety for Griffin Pipe Products where he provided strategic human resource programs for their US business involving three manufacturing locations.

Mr. Luce undergraduate work was performed at the Confederation College where he studied Human Resources and Industrial Relations. Mr. Luce earned an MBA from Athabasca University and continued his learning with the University of Chicago – CMI program at the Booth School of Business.

Christine M. Michel

Chris Michel is Senior Vice President, Global Human Resources and Communications of Exterran Corporation and previously served as Senior Vice President, Global Human Resources, of Exterran Energy Solutions, L.P. She joined Exterran in 2009 after serving in a number of positions of increasing responsibility for Ford Motor Company, including Executive Director, Human Resources, The Americas and Corporate Staffs; Executive Director, Global Compensation and Benefits; HR Manager, Corporate Finance; and HR Manager, Ford of Hungary.

Toyin Ogun

Toyin Ogun is responsible for overseeing all aspects of global human resources for HAVI, including talent and leadership development, succession planning, performance management and total rewards.  Toyin has 30 years of experience in the field of human resources and joined HAVI in June, 2014. He is based in Downers Grove, IL.

Prior to joining HAVI, he served as the Senior Vice President for Human Resources and Customer Service for Zale Corp., based in Irving, Texas.  In this role, he was responsible for all human resource activities, as well as the direct guest/customer service experience.

Toyin was the Head of Human Resources at LL Bean, based in Freeport, Maine, where he led a successful transformation of the human resources function.  From 2007-2009, he was Chief Talent Officer for Sears Holdings in Hoffman Estates, Illinois.  Prior to Sears, Toyin spent ten years as human resources executive with Limited Brands, where he held a variety of positions, ending as the Senior Vice President, Victoria Secret stores.

Toyin has a Bachelors’ degree in Business Administration from North Dakota State University, a Master’s degree in Human Resources from Troy University and a Doctorate in Business Administration from Nova Southeastern University.

Toyin is an advocate of Human Rights causes especially as it relates to issues of family violence and he serves on the Board of the DuPage County Family Shelter of Illinois.

Tim Paige

Tim is responsible for overseeing all aspects of human resources management for Bryant University, including all workforce planning, talent acquisition, learning and development, employee and labor relations, and total rewards initiatives for the University.  Founded in 1863 and located in Smithfield, Rhode Island, Bryant is a top-ranked private university with a tradition of innovation and a global vision for success. Its academic programs are distinguished by an integration of business and the arts and sciences with a global perspective.  Tim has 37 years of experience in the field of human resources and joined Bryant in September, 2016.  Tim resides in Providence, Rhode Island, and has been a Senior Fellow of TSI since 2012.

Last 1-3 HR Leadership Roles (Company – Title – Yrs)

  1. Vice President, Human Resources, Libbey Inc., 1997 – 2016
  2. Director, Human Resources Administration, Libbey Inc., 1995 – 1997
  3. Various Human Resources Leadership positions, Frito-Lay, Inc., 1985 -1995

Bachelors’ – Amherst College

Personal &/or Professional Affiliations
Board Trustee, Greater Providence Chamber of Commerce
Employer Advisory Committee, Rhode Island Quality Initiative

Ed McCann

Ed is responsible for providing HR leadership across all ED&F Man businesses within the North America region. His role includes managing HR business partner teams as well as the benefits, policy, and payroll functions. Ed joined ED&F Man in April 2015.

ED&F Man is a privately held, specialist merchant of agricultural commodities, trading specifically in sugar, molasses, coffee, grains and pulses. The company provides services across the whole supply chain, including sourcing, processing, marketing, distribution and transport.  Founded in 1787, ED&F Man operates in 60 countries with over 7000 employees.

Based in Chicago, Illinois, Ed has 20+ years of HR generalist experience, and has been a Fellow of TSI since 2015.

Previous HR Leadership Roles

  1. AMCOL International Corporation; VP Human Resources,   2006-2015
  2. BP, HR Manager,  1999-2006

Bachelor’s Degree – University of Illinois  (Champaign/Urbana); Industrial Psychology, 1994

Master’s Degree – University of Illinois (Champaign/Urbana); Industrial Labor Relations, 1995

SHRM Advocacy Team – Member since 2016

Areas of Expertise –Change Management, Labor Relations, and Benefits

Michelle Tenzyk

Michelle is President of East Tenth Group. Michelle works as a strategic leadership advisor and executive coach to CEOs by leveraging 25 years in business to bring insight, perspective, and experience to all aspects of human resources. Her goal is to support, strengthen, and revitalize your organization so you attract, retain and develop the right talent. Because when your people thrive, your business thrives.

Michelle advises and coaches CEOs and senior level executives to create company cultures that attract and retain critical talent at all levels. Her leadership coaching has expanded key executives’ effectiveness and their ability to improve their organization’s results. She particularly focuses on strengthening leadership capabilities, operational excellence, executive presence and confidence and navigating organizational nuances. Michelle works with growth enterprises and middle market companies to develop talent management solutions that improve performance, encourage increased productivity, and better engagement. She has also guided organizations through mergers, downsizings, and turnarounds.

Michelle has held senior HR and executive team positions at a wide range of companies—from financial services firms to marketing communication agencies. She most recently served as EVP, Chief Human Resources Officer for Healthcare Consultancy Group, part of Omnicom, where she led the talent function for nine companies and served as trusted advisor to the companies’ presidents and the group’s CEO.

Michelle founded East Tenth Group, a New York City based boutique consulting firm, in February of 2008 and has been a Senior Fellow of TSI since 2011.

Nancy Tostanoski

Nancy Tostanoski joined OUTFRONT Media in 2014 and currently serves as Executive Vice President, Chief Human Resources Officer overseeing talent acquisition and management, compensation and benefits, recruitment, diversity and inclusion, communications, and administration. With over 25 years’ human resources experience, Nancy has championed significant cultural changes at OUTFRONT, including the creation of a diversity and inclusion counsel and corporate social responsibility initiative. Before coming to OUTFRONT, Nancy served as Vice President, Global Compensation and Benefits at PVH Corp. (formerly known as The Warnaco Group, Inc.), where she was responsible for global compensation, benefits and performance management for the publicly-held, branded apparel company. And before that she was Vice President, Global Compensation, Benefits and Shared Services at Reader’s Digest Association, Inc., where she was responsible for global compensation, benefits and U.S. shared services for the privately-held publishing and media company. Nancy is based in the New York headquarters of OUTFRONT Media. She lives in New York with her husband and four children.

OUTFRONT Media is one of the largest out-of-home advertising and media companies and leverages the power of technology, location and creativity to connect brands with consumers outside of their homes through one of the largest and most diverse sets of billboard, transit, and mobile assets in North America. Through its ON Smart Media platform, OUTFRONT is implementing digital technology that will fundamentally change the ways advertisers engage audiences on-the-go.

Prior HR Leadership Roles
PVH (formerly The Warnaco Group, Inc.)
Vice President Global Compensation and Benefits, 2010-2013

Reader’s Digest
Vice President, Global Compensation, Benefits and Shared Services, 2007-2010

Starwood Hotels and Resorts Worldwide, Inc.
Senior Vice President, Global Compensation and Benefits 2003-2006
Vice President of Global Benefits 2001-2003
Director of Benefits 1998-2001

Georgetown University, BA English 1986
Northeastern University, MBA 1992

Areas of Expertise
Compensation Committee

Personal Affiliations
Georgetown University Alumni Ambassador

Elizabeth Wood

Elizabeth Wood is Chief Human Resources Officer for Levi Strauss & Co. In this position, she is responsible for leading all aspects of the human resources function, including recruitment, talent planning and organizational development. As a member of the worldwide leadership team, she also helps set the company’s global direction.

Elizabeth is a seasoned human resources executive, bringing 25 years of retail and apparel experience to the role. Her background includes leading brands and businesses through transformational change.

Elizabeth comes to LS&Co. from Toys “R” Us, Inc., where she was senior vice president of human resources. Prior to Toys “R” Us Inc., Wood was Chief Human Resources Officer at Warnaco, before it was acquired by PVH Corporation. She also has held leadership positions at Brooks Brothers and Marks and Spencer Group plc.

She holds a degree from Durham University and a postgraduate degree in human resources from University of West London.