Leadership Team | John Crane
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Jean Vernet President and CEO, John Crane

Jean Vernet

CEO and Division President

Jean Vernet, appointed in 2017, is the 14th CEO to lead John Crane since its founding in 1917. In this role, Jean has global responsibility for one of the largest divisions of Smiths Group. Jean holds more than 30 years of experience in business development, technical sales and finance, with leadership in various markets including oil and gas, specialty metals, technology, big data, and clean energy, and across services and engineered products.

Prior to joining John Crane, Jean was CFO of Expro, a global leader in critical oil and gas deepwater exploration and completion services. Before joining Expro in 2012, Jean served as CFO of technology companies Grid Net and FormFactor, and as Director of Risk at Rio Tinto Alcan.

From 1996 to 2007, Jean was employed by Schlumberger, a leading provider of technology services for reservoir characterization, drilling, production, and processing to the oil and gas industry. For over 11 years he held positions of increasing responsibility including Finance Director of the wireline business and corporate R&D. Over his career, Jean has lived and worked in Asia, Europe, and the U.S.

Jean earned an MBA in finance and accounting from the University of Chicago's Booth School of Business, and an MSE in Mechanical Engineering from Ecole Centrale de Lyon in France.

Celine Boland - Chief Financial Officer of John Crane

Celine Boland

Vice President and Chief Financial Officer

Celine Boland is Vice President and Chief Financial Officer, responsible for leading the company’s global finance function and all financial operations, and driving financial excellence across the organization.

Since joining John Crane in 2000, Celine has held several finance leadership roles including Finance Director at John Crane Ireland and Director, Global Financial Projects and M&A. Prior to her current position, Celine relocated to the divisional headquarters in Chicago, Illinois, in 2011, where she served as Global Finance Director supporting the division in driving global business performance, integrating business strategic planning and forecasting, supporting investments, including M&A and driving analytical excellence.

Prior to joining John Crane, Celine held various finance roles in privately held Irish companies and started her career in Chartered Accounting Practice. Celine holds a Bachelor of Arts in Business from the Institute of Business and Accounting in Dublin, and is a Certified Public Accountant.

Olivier Lacquemanne

Olivier Lacquemanne

Executive Vice President, Human Resources

Olivier Lacquemanne joined John Crane in January 2018, and currently serves as Executive Vice President, Human Resources. In this role, he is responsible for leading and deploying global human resources strategies across the division to support the business vision.

Prior to joining John Crane, Olivier spent nearly 30 years at Schlumberger―the world’s leading oilfield services company―in various leadership roles including, human resources, marketing, news business development, sales, IT and operations. In his most recent role at Schlumberger, Olivier served as Vice President, Human Resources for M-I SWACO and was responsible for managing 15,000 employees across more than 70 countries. Olivier managed all aspects of strategic workforce planning including, talent acquisition, training and career development, competency and talent management, succession planning, and compensation strategies.

Over the course of his career, Olivier has garnered international experience in senior leadership roles throughout a variety of geographies spanning Latin America, North America and Europe.

Olivier received a Master of Science in Mechanical Engineering from Ecole Catholique d’Arts et Metiers in Lyon, France.

Ruben Alvarez

Ruben Álvarez

Executive Vice President, GeoMarkets

Ruben Álvarez is Executive Vice President, GeoMarkets covering both OEM and End User customers where he is responsible for sales, repair and services around the world.

Since joining John Crane in 1998, Ruben has held several management roles including Managing Director for John Crane Iberica and John Crane Western Europe, as well as Managing Director of John Crane MEA and Vice President and General Manager of John Crane’s upstream oil services business. Most recently, Ruben served as Vice President of John Crane’s First Fit Business, where he held global responsibility for the First Fit, OEM and Engineering, Procurement and Construction customer business.

Ruben holds a Bachelor’s degree in Aerospace Engineering from University of Central Florida and an MBA in International Management from European University of Toulouse, France. He also successfully completed the International Executive Management Program and the Corporate Leadership Program at Harvard Business School.

Terri Willis

Vice President, Global Quality and HSE

Terri Willis is Vice President, Global Quality and HSE, responsible for leading initiatives to enhance the company’s health, safety and environmental performance, along with various continuous improvement and business process standardization initiatives across the organization’s global network.

Prior to joining John Crane, Terri spent nearly 25 years at Schlumberger, the world’s leading oilfield services company. In her most recent role as Vice President, Production Group in Latin America she had full P&L responsibility of four product lines, with a shared emphasis on expansion and outperformance, across multiple countries. Over the course of her career, Terri has garnered international experience in senior leadership roles throughout North America, Asia and Latin America.

Terri received a Bachelor of Science in civil engineering from Prairie View A&M University.

John Long

Executive Vice President, Product Line and Operations

John Long is Executive Vice President, Product Line and Operations, and is responsible for leading the strategic transformation of Global Operations by driving flexibility and differentiation through product and service quality.

Since joining John Crane in 2002, John has held several management roles including U.K. Manufacturing Manager, and then Operations Director where he oversaw the development and implementation of strategic planning to increase operational efficiency and effectiveness.

He then transitioned into commercial roles serving as the General Manager Saudi Arabia, General Manager Middle East, Managing Director Canada, and Vice President of Sales and Service Europe. Most recently, John served as Vice President of Strategic Manufacturing & Supply, where he was responsible for John Crane global operations, supply chain and manufacturing technology strategy.

John holds an MBA from Aston Business School in Birmingham, U.K.

Tiffany Amlot

General Counsel and John Crane Company Secretary

Tiffany Amlot is the General Counsel and John Crane Company Secretary, serving as the chief legal advisor and leading the John Crane legal team in providing support across all facets of the company. Tiffany joined Smiths Group in October 2017, as General Counsel, Group Litigation. In this role, she managed litigation matters for all Smiths’ divisions globally.

Prior to joining Smiths, Tiffany was a partner at the multinational law firm Dentons U.S. LLP, representing corporate clients in disputes and litigation in a variety of sectors.

Tiffany holds a Bachelor of Arts in Sociocultural Anthropology from Yale University and a Juris Doctor from the University of Michigan Law School.

Amy Simpson

Executive Vice President, Energy Transition

Amy Simpson joined John Crane in March 2021, and serves as the Executive Vice President, Energy Transition. In this role, she is responsible for John Crane’s energy transition and decarbonization agenda, and will lead business development initiatives related to the global shift toward net-zero carbon emissions.


Prior to joining John Crane, Amy spent more than 20 years at Schlumberger, most recently serving as Director, Global Stewardship Integration, where she led the company-wide rollout of a global sustainability program. Amy also served as Vice President, Global Account Director, and held other international roles in operations, account management, strategic marketing, communications and field operations, with assignments in the U.S., Australia and throughout Europe.


Amy received a Bachelor of Science in Chemical Engineering from the University of Michigan. She has also completed an executive fellowship at the Center for Strategic & International Studies


Cyrille Levesque

Division Chief Technology Officer

Cyrille Levesque is Division Chief Technology Officer, responsible for ensuring the long-term strategy in new technology is aligned with the plan of growth of John Crane.

Cyrille has more than 26 years of experience in product development and manufacturing. His expertise covers bringing low-volume and high-volume products from concept to fully commercial states.

Prior to joining John Crane, Cyrille was part of Schlumberger, the leader in services for characterizing, drilling and producing oil and gas reservoirs. For the last 16 years, he held multiple management roles with assignments throughout France, the Middle East and the U.S. He was later appointed Head of Engineering and Manufacturing of two multibillion dollar divisions of Schlumberger.

Cyrille holds a Master of Science in Electronics from the École Centrale de Paris in France.