Leo Sheridan, CEO & President

Leo Sheridan is chief executive officer and president of the Advanced Group, a staffing and outsourcing solutions provider with offices across the U.S. In 1988, Sheridan founded Advanced Resources, and as the firm quickly expanded, he added additional businesses to create the Advanced Group. Today, the Advanced Group includes Advanced Resources, Advanced Clinical, the WunderLand Group, and Advanced RPO. 

Leo earned a Bachelor of Science degree in business administration from St. Michael’s College in Vermont. He completed the Executive Management Program at Northwestern University’s Kellogg School of Management. He has provided leadership to a variety of professional organizations, including TechServe Alliance, American Staffing Association, and Young Presidents’ Organization. He serves on the Board of Directors for Cristo Rey Network and the Board of Trustees for Robert Morris University.

Jim Johnson, Chief Operating & Financial Officer

Jim Johnson has been Advanced’s Chief Financial Officer since 2002. He oversees all matters related to finance, accounting, treasury, operations, technology, and human resources. He has led the negotiation and subsequent integration of several mergers and acquisitions, negotiated several business divestitures, and negotiated more than 10 loan agreements.

Previously, Jim served as the EVP of Finance for HALO Industries, Inc., a $400 million publicly traded marketing services and products business. Prior to this role at HALO, Jim was the Chief Integration Officer, responsible for all aspects of the integration of Starbelly.com, an e-commerce promotional products company, with HALO. Before HALO, Jim had been the CFO of Starbelly.com, where he was responsible for all financial and accounting matters of the venture-backed Internet company, including equity raising efforts and financial leadership in the sale of Starbelly.com to HALO in May of 2000.

Jim began his career at Arthur Andersen in 1989, where he worked until joining his client Starbelly.com in 1999. He concluded his career at Arthur Andersen as a Senior Manager. Jim is a Certified Public Accountant in Illinois and graduated Magna Cum Laude from the University of Notre Dame in 1989 with a B.B.A. in Accounting.

Mary Finley, Vice President, Human Resources

Mary leads Advanced Group’s Human Resources function, serving over 400 internal employees and 1,500+ talent. She brings progressive experience in conceptualizing and implementing global human resources projects and programs, with a focus on human capital management, recruitment, development and retention of talent.

Prior to joining Advanced Group, Mary led global Talent Acquisition, Learning & Development, and strategic HR for TwentyEighty, a global leader in workplace performance solutions. While at TwentyEighty, she also held business operations roles, which included leading global sales operations, running an executive PMO and working to integrate business lines post-acquisition.

Mary holds the SPHR and PMP certifications, a master’s certificate in Project Management from George Washington University and an undergraduate degree in Business Administration from the University of Mary Washington.

Tim Jackson, Vice President, Technology & Operations

Tim earned his staffing industry credentials managing a nurse staffing/MSP business and a PeopleSoft consulting practice. Tim's insights into the strategic role of contingent labor and how to best use technology serves our internal teams, clients and talent well.

Prior to working in the staffing business, Tim was CFO/CIO for a Chicago-based food manufacturer and a co-founder and former COO of an e-learning start-up. Before that, Tim managed a number of product management groups at Bank of America specializing in corporate finance and investment management.

Tim Jackson has a B.S. in Finance from DePaul University and an M.B.A from the University of Chicago specializing in Finance and Marketing. He and his family live in the northern suburbs of Illinois.

Julie Ross, President, Advanced Clinical

Julie is a tenured executive leader responsible for all aspects of strategic planning, corporate alliances, sales and marketing, operations, financial management and regulatory compliance for Advanced Clinical’s CRO and Patient Recruitment offerings. Previously with inVentiv Health Clinical, Ms. Ross served as Senior Vice President, Global Strategic Services and had oversight of Feasibility, Patient Recruitment and Retention, Global Study Start-up, Document Management and Publishing, Expedited Safety Reporting, Grants and Contracts, Clinical Trial Supply Management and Medical Writing. She has a therapeutic specialty in urology and gastroenterology and has consulted with many clients developing products in BPH, MED, OAB, and IBS.

A graduate of the University of Wisconsin, LaCrosse with a bachelor's degree in Nuclear Medicine Technology, Ms. Ross has been in the clinical research industry for over twenty five years. She has held a number of crucial positions allowing her to gain comprehensive knowledge in all facets of clinical research, as well as the Program Director for the School of Nuclear Medicine and Diagnostic Ultrasound at St. Mary's Hospital in Milwaukee, Wisconsin.

Rich Diaz, President, Advanced Resources

As President of Advanced Resources, Rich’s goal is to help people, whether it’s helping a client solve a problem or a candidate finding the next job in their career. Mostly, Rich is driven to help our internal team learn, grow, and reach their potential. “In short, our job is fun! We have the ultimate flexibility to provide tailored solutions that really make a difference. We aren’t here for the money, but instead what we do really helps people in their professional lives.”

Rich joined Advanced Resources with more than 15 years of experience working for high growth, results-oriented companies, including management roles at SolomonEdwardsGroup (SEG) and MPS Group.

Rich is an Ernst & Young Entrepreneur Of The Year® Midwest Finalist and under his leadership Advanced is a perennial Top Workplace winner. He is a member of HRMAC, SHRM, and FEI. Rich graduated with a Bachelor of Science degree in psychology from Northwest Missouri State University.

Pam Verhoff, President, Advanced RPO

Pam is an accomplished executive leader that has extensive experience building RPO businesses and solutions, as well as developing growth strategy. Pam is responsible for all aspects of strategic planning, sales and marketing, operations, financial management and compliance for Advanced RPO. Her success has largely been a result of building high performance teams and creating a values-driven culture resulting in exceptional employee engagement.

Pam is passionate about impacting every client’s talent acquisition results. The ultimate compliment is when clients tell her that Advanced RPO “gets it”.  She hears it often and Pam believes it’s a result of the experience and strength of the team along with the unique approach we take with each client engagement. Our agenda is not to disrupt, it is to collaborate, innovate and leverage best practices to create an efficient hiring program. Pam’s goal is provide business leaders peace of mind by creating confidence in their talent acquisition function.

Jon Jelinek, President, WunderLand Group

Jon serves as WunderLand Group’s President, leading all aspects of the firm’s growth strategy. “You’re not just a ‘number’ at WunderLand. We strive to make a difference every day, so we place our team, clients, and talent first.”

Prior to joining WunderLand, Jon was Managing Director at Advanced Resources, an affiliate company. WunderLand Group and Advanced Resources are part of the Advanced Group, an industry-leading diversified professional staffing, consulting, and outsourcing organization. Jon joined Advanced Resources in 2014 as HR Division Director to build the HR practice. In just 18 months he was promoted to Managing Director. During Jon’s time at Advanced Resources he built the HR practice to become the largest HR staffing business in Chicago. He also developed the HR consulting practice to offer additional solutions for clients.

Jon is active in the staffing industry, participating in Chicago SHRM, HRMAC, STAR Chicago, and ELITE. He was recognized by Staffing Industry Analysts as one of 35 Millennials in staffing to be shaping the future of the American economy through results and community involvement. Jon has served on the Board of Directors for Chicago SHRM since January 2016.

He received his bachelor’s degree in Business Management, Entrepreneurship from Illinois State University.