Senior Leadership


Jeffrey J. Hansen

As Chief Executive Officer, Jeffrey (Jeff) Hansen works with stakeholders to ensure awareness of the overall strategic direction and financial health of the company. Specifically, Jeff is responsible for driving the integrity and sustainability of the business by building a culture of leadership excellence and accountability. Jeff believes in fostering a progressive business environment through innovation, creativity and growth to maximize the organization’s performance and effectiveness.

Jeff leads AP’s national footprint of border-to-border and coast-to-coast capabilities to deliver an exceptional product and building experience to its customers. Jeff has held financial leadership positions in family-owned entrepreneurial companies with operations in construction, real estate development and property management. Jeff is a certified public accountant.

Jeff holds a bachelor’s degree in Accounting from the University of Northern Iowa.


Cesar Diaz

As Chief Financial Officer, Cesar Diaz works with regional leaders to assist them with financial solutions, business opportunity analyses and risk management support. Cesar creates a collaborative environment and believes in establishing cross-functional partnerships to deliver optimal financial results.

Cesar brings more than 15 years of experience in the construction industry and is a champion for the application of data analytics within AP.  Cesar drives the financial integrity and sustainability of the business, including timely and accurate financial reporting, cash flow management, financial modeling and forecasting.

Cesar is a Certified Management Accountant
Cesar holds a bachelor’s of science degree from the University of Michigan and a Master’s in Business Administration from the Michigan State University.


Brenna Mann

As Senior Vice President and General Counsel, Brenna Mann is responsible for overseeing all legal and risk management affairs of the company. She and her team serve as a national resource to all AP entities, providing counsel to mitigate risk and protect profitability. Brenna believes proactive and collaborative efforts promote the best outcome for all parties involved in AP’s projects.

Brenna is a trusted advisor to all AP stakeholders and navigates complex business issues to outstanding outcomes. She ensures that the legal and risk management groups operate as strategic partners and problem solvers to the business. Brenna also leads governance as corporate secretary to the AP Board of Directors.

Brenna has been a practicing attorney for over 20 years, both in private practice and in-house roles. She has extensive corporate, litigation, transactional and risk management experience in the construction market.

Brenna holds bachelor’s degrees in Business Management and Political Science from Hamline University and a J.D. from the University of Minnesota Law School.


Frank Sarno

As Vice President, Construction Processes and Technologies, Frank Sarno partners with our regional offices and operational leadership to develop and drive overall business strategy and direction for the company’s construction processes and technologies. Frank has more than 20 years of operations, financial and technical leadership experience in the construction industry. Frank leads a team of highly skilled individuals whose focus is to ensure project management and construction related processes are executed to drive successful outcomes that provide positive experiences for both AP’s customers and project teams.

Frank has long been a champion of Lean Construction and ‘grass roots’ based innovation in the field.  His innovation framework has allowed AP to expand their number and quality of innovations occurring in the field along with the urgency in which AP democratizes them to all team members.

Frank holds a bachelor’s degree in Construction Engineering from Iowa State University and his Master’s in Business Administration from the University of St. Thomas.


JoAnn Stork

As Vice President, Human Resources, JoAnn is responsible for leading AP’s commitment to attract and retain top talent and build high-performing teams that deliver exceptional results to the market.   

JoAnn is a veteran HR professional, her team provides consultative and advisory partnerships and creates best-in-class programs, tools and processes. JoAnn believes strongly in training and career development, total rewards and recognition, team development and leadership continuity across the business.

JoAnn is the champion of integrating company culture and values throughout all people-practices.  A key priority for her is the development of knowledgeable servant leaders who are empowered to make AP decisions that reflect and optimize both the national brand and the local connection.

JoAnn holds a bachelor’s degree in Business from Drake University.

Vice President, Field Operations

Kent Weicht

In his role as VP, Field Operations Kent’s corporate responsibilities include safety, quality, productivity resourcing and corporate operations. He was previously Executive Vice President, with responsibility for AP’s Mountain States, Gulf States, California, Washington State, Arizona, Atlantic regions and all federal projects.

Kent joined AP in 1991 and served as project superintendent, project manager and Vice President of Operations with direct responsibility for field operations throughout the company. Kent led the implementation of Total Station at AP, increasing the efficiency and accuracy of surveying and layout, and has been instrumental in AP’s approach to safety. And development of Quality Control process and implementation In October 2015, AP adopted an incident and injury free safety model for the future, and Kent is currently leading a national team tasked with building safety as a culture throughout the company.

Prior to his career at AP, Kent was a civil and construction engineer with two national engineering/construction firms, where he gained engineering, construction and quality control experience in Heavy Civil, Industrial both in manufacturing and oil refinery.

Kent holds a bachelor’s degree in Civil Engineering from Montana State University and an MBA in Finance from Colorado State University. He serves on the board of AP Development and is chairman of the board for iState Insurance. He is an active member of the Associated Builders and Contractors of Colorado and the American Subcontractor Association.

Away from the office Kent enjoys skiing, fly fishing, hiking and spending time with his family.


Regional President

Mike Bontrager

As the Regional President, Mike Bontrager oversees the strategic direction and overall growth performance of the AP Southwest region. With over 35 years of construction experience, he directs all activities, including estimating, scheduling, project and field management, marketing and business development.

Mike’s expertise includes expanding organizations through market introduction, sector growth and high-performing cultures. His role extends to showcasing AP’s reputation for integrity, community involvement and client-centric solutions.

He is currently the co-chair of the Greater Phoenix Chamber Foundation Construction Workforce Collaborative, aimed at increasing the number of qualified applicants in the construction trades. In addition, he serves on the boards of numerous associations, including the Greater Phoenix Chamber of Commerce Board of Directors, the Better Business Bureau Board of Directors, Arizona Business and Education Board of Directors and Beatitudes Campus Board of Directors.
Mike received his degree in Construction Engineering from Iowa State University.


Tom Horsting

As Regional President, Tom Horsting directs all operational activities of the region and is responsible for strategic planning, risk management and operational decisions. Tom reinforces with all regional teammates a culture of trust, believing that doing the right thing by AP projects and clients is always the right choice.

Since joining AP 1984, Tom has held a number of positions, including superintendent, general superintendent, vice president, and senior vice president. He works closely with the region’s leaders in marketing, business development, preconstruction, project management, field operations and finance to produce and execute comprehensive plans covering every aspect of the region’s operations.

Tom serves on the board of directors for the Metro Denver Economic Development Corporation, and is a board member of the Associated General Contractors of Colorado (AGC). He is a member of the US Green Building Council, the Rocky Mountain Chapter of the Associated Builders and Contractors (ABC), the American Hospital Association (AHA) and is Healthcare Construction Certified through the American Society for Health Care Engineering (ASHE).


Mark Liska

As the Regional President, Mark Liska leads regional operations and is responsible for strategic planning, risk management and operational decisions. He works closely with business unit leaders in marketing, business development, preconstruction, project management, field operations, safety and finance to create and execute comprehensive strategic plans.

Since joining AP in 1987, Mark has worked in many roles. He believes that everyone brings value to a team and that through hard work, focus and passion, we all succeed. He actively supports the continued advancement of every AP employee throughout their careers.

Active in his community, Mark is the Past President of Sunnyside Marina, Past Commodore of the St. Croix Yacht Club and an active member and volunteer at Eagle Brook Church.

Mark holds a bachelor’s degree in Construction Management from Bemidji State University and has completed the Executive Education program at the University of St. Thomas. He is a LEED-Accredited professional.


Humberto Lopez

As Vice President of Industrial Markets, Humberto Lopez works with all regional offices to identify, secure, develop and lead projects focused on the manufacturing, automotive, food and beverage and supply chain industries. Humberto’s experience in both the design/construction and operation of industrial facilities, allows him and the AP team to assist organizations in developing world class facilities that incorporate the latest technologies and innovations.

Humberto is a seasoned leader with more than 30 years of experience successfully delivering projects for domestic and multi-national corporations and has significant knowledge and expertise in the markets he serves. This includes management positions in the Oil & Gas, Brewing and Construction industries for organizations in the US and South America.

Humberto holds a degree in Civil Engineering from University Rafael Urdaneta in Venezuela and has completed advanced studies in Structural Design, Business, Brewing and Supply Chain.


Corbett Nichter

As President of the AP Gulf States Region, Corbett believes his greatest professional mission is to serve the dedicated employees of the Region in executing the strategic plan while creating an unequaled company culture.

With over 26 years of construction experience, he strives to be a servant leader in support of every level of the organization and all facets of the business, including estimating, scheduling, project and field management, risk management, marketing and business development.

Corbett has extensive experience in negotiating and executing significant, complex construction projects totaling more than $3 billion for a variety of clients, including numerous Fortune 100 firms. However, his favorite projects are those that serve the community, such as the Dallas Children’s Advocacy Center (DCAC), Grapevine GRACE’s food pantry and clothing center, and the new headquarters for Southwest Transplant Alliance.

Corbett’s passion is serving at-risk children and veterans of the United States Armed Forces. He served multiple terms on the Board of Trustees for the DCAC and currently serves on the organization’s Advisory Council. He was recently named to the national Board of Directors for the One Heart Project, which provides at-risk and incarcerated youth a second chance. His grandfather, a WWII veteran, remains an inspiration and drives his passion for organizations such as 22Kill, The Seal Legacy Foundation, and programs like AP’s Veteran Transition Initiative that focuses on employment opportunities for veterans.

In 2002, the Engineering News-Record recognized Corbett with the prestigious Newsmaker of the Year Award, and in 2007 he graduated from Leadership Dallas, a program of the Dallas Chamber of Commerce which he still remembers fondly to this day.

Corbett holds a bachelor’s degree in Civil Engineering from Texas A&M University in College Station and an MBA from Houston Baptist University. He also completed post-graduate studies at Stanford University’s Graduate School of Business.