Meet the Team


David W. Phifer


David Phifer is the founder and CEO of Apartment & Condominium Concepts Unlimited, Inc. Mr. Phifer is a licensed real estate broker in the State of Colorado and has also received the designation of Certified Apartment Property Supervisor from the National Apartment Management Accreditation Board. Additionally, Mr. Phifer is the past President of the Apartment Association of Metro-Denver, and also the past President of the National Apartment Association.

Prior to founding ACCU, Inc., Mr. Phifer had fifteen years experience in Property Management of multifamily property management. He began his career in Property Management as a Residential Manager in 1964 to supplement his income while attending the University of Minnesota. In 1970, Mr. Phifer was hired by Godwin Bevers Development Corporation in Colorado Springs. Here Mr. Phifer was in charge of the firm’s multi-family housing division. In 1974, Van Shaack and Company employed Mr. Phifer to work in the companies property management division.

In June of 1979, Mr. Phifer founded Apartment & Condominium Concepts Unlimited, Inc., realizing that Denver’s need of a multifamily housing management company utilizing the expertise of Denver’s most prominent property managers and support staff. Apartment & Condominium Concepts Unlimited has assimilated one of the finest groups of property management professionals available in the Denver Metropolitan area.

Mr. Phifer’s goal remains to craft one of Denver’s premier property management organizations and build upon his years of experience and expertise. Through an open-door policy, Mr. Phifer is always accessible to his staff and homeowner association clients.


James Phifer

Licensed Colorado Community Association Manager

Starting his career in the Management of Community Associations at 16 years old James began by maintaining grounds, changing light bulbs, cleaning hallways, and sweeping garages for many different types of communities.

After college James took a position as an onsite Community Association Manager furthering his experience in Community Association Management.
James was afforded the opportunity to manage the Beavallon Condominium Association in 2002. He quickly accepted that position giving James the opportunity to learn and explore the complexity of luxury high-rise mix use community management.

In 2004 James was given the opportunity to continue to grow and become a portfolio manager with ACCU, Inc. After accepting the promotion James started to get diverse experience in portfolio management including new construction, conversion projects, single family, multi-family and mixed use high-rise and mid-rise Associations.

James was promoted to Assistant Vice President of ACCU in 2008, in this position James worked closely with supervising at the senior staff level and in 2012 accepted a promotion as Executive Vice President of ACCU, Inc. in this position James put together along with the President of ACCU the leadership team which will take ACCU into the next level of professionalism within the Professional management of Community Associations.

As of January 1, 2015 James began serving as President of ACCU, Inc.


Mark E. Kreger

Vice President of Operations
Director of Vendor Relations
Senior Licensed Colorado Community Association Manager

Prior to 1978, Mark Kreger’s background focused on the construction of new homes. This gave Mark extensive knowledge of blueprints and all phases of construction, including, rough and finish carpentry, electric installation, plumbing, heating and cooling systems, concrete, masonry, and final inspections. In 1979, ACCU, Inc. was pleased to add Mark to the team.,

Mark originally managed ACCU, Inc.’s satellite offices in Denver and Houston. In 1983, Mark moved permanently to the Denver headquarters, as Property Manager of Community Associations.

Mark’s property management background includes a 470-unit condominium conversion, apartment community management, commercial fee management, custom tenant finish, and all phases of association management. Mark’s familiarity with associations is two-fold. He has served as both an association board president and has over 30 years of association management experience.

In 1995, Mark was named Vice President of Property Management. Mark’s professional skills and hands-on industry knowledge are invaluable assets that have added to the success of ACCU, Inc.

Karli Phifer

Executive Director of Business Affairs

Karli has been using her creative vision and insight in company management to enhance the functions of ACCU, Inc. She earned her degree in Business Management emphasizing in Accounting and Marketing. Karli’s passion for networking, education, and constant improvement help lead the team to grow. Her experience in bookkeeping, budget management, and project management gives a demonstrated history working in the HOA and law industry.

Karli is the 2022 President-Elect for the Community Associations Institute Rocky Mountain Chapter, an organization with over 1,000 members devoted to serving, supporting, and educating community association board members, managers, and business partners. Karli will serve as President-elect for 2022 and then as President in 2023.

Samantha Avila

Executive Assistant

Samantha Avila is a highly experienced professional with a proven track record in executive level administration services. With a passion for delivering results, she has a strong commitment to excellence. Samantha has worked hard to build the administrative services team for the organization and she has been responsible for developing and implementing a range of policies and procedures to ensure the smooth running of the company.

Under her leadership, ACCU, Inc. has seen marked improvement in productivity, customer service and organizational effectiveness. Her strategic vision and ability to optimize processes and resources have led to improved results in all areas. With her keen eye for detail and ability to build strong working relationships, Samantha is a driving force behind making positive change in the workplace. She is committed to providing a positive environment and pursuing ambitious projects while focusing on keeping her team motivated and energized.

Samantha is an invaluable asset to ACCU, Inc.
She has built a successful working relationship with her team, and together they have achieved great results in customer service and the betterment of HOAs. She is passionate about making a difference and is continuously striving to make ACCU, Inc. an even better place to work.

Samantha Avila
Melissa Stern


Melissa Stern

Licensed Manager of Community Associations

In 1994, Melissa received an associate degree in Applied Science. Melissa grew up in the Property Management industry with her parents and began her career in Property Management in 1996 and has worked in Property Management for 21+ years.

Melissa takes a proactive approach to the daily operation of the communities she manages. In addition, Melissa works together with the Board members to develop goals to carry out policies and procedures for the betterment of the community. Melissa currently holds her CMCA designation and continues her education in Community Association Management through CAI.

When Melissa is not working, she enjoys spending time with her children and grandchildren either traveling with her son for Taekwondo tournaments or supporting her granddaughter in Cheer Competitions, volleyball games or softball games. Melissa also has two Huskies and German Shepherd-Huskie mix which keep her just as busy as her children and grandchildren do.


Kami Sharp

Licensed Manager of Community Associations

In 2015, Kami received an Associate Broker license from Armbrust Real Estate Institute. Kami immediately pursued the property management side of real estate. After just six months of being an assistant manager, Kami passed both the CMCA and CAM licensing and became a portfolio manager.

Kami believes in a team-based approach to the daily operation of the communities she manages. In addition, Kami works together with board members to develop priority lists and goals to carry out deferred maintenance issues. Kami also works with the board and the HOA’s legal team to create policies and procedures for the betterment of the community. Kami still currently holds her CMCA designation and Associate Broker’s License.

Kami recently became Division Manager for ACCU Rents. She oversees all operations for the rental units that ACCU manages. Kami is actively pursuing the growth of this division by creating marketing material for ACCU Rents.

When Kami is not at work, she enjoys spending time with her Son. Her son is very active in baseball, which keeps the entire house busy.

Kami Sharp
Melissa Stern


Manager of Community Associations


Yvonne Garcia

Manager of Community Associations

Yvonne, a Denver native, worked for ACCU, Inc. as on-site staff while obtaining her BS in Mathematics from CU Denver. She has had a professional career serving the Denver Metro Community in public health and other non-profits but opted to return to property management having never found an industry she enjoyed more. Yvonne enjoys working with a diverse population and the ever-changing challenges of property management and is delighted to be a member of the ACCU portfolio management team.

In her free time, Yvonne can be found volunteering in her own community, watching sports, and spending time with friends and an enormous extended family. Seriously, there are hundreds of them.

Yvonne Garcia
Michael Gima

Michael Gima

Manager of Community Associations

Michael has been in customer service and project management for over 20 years before transitioning to Community Management.  His commitment to customer service is a source of pride and a passion for him.  Michael has a thoughtful approach to board member and homeowners concerns and is results driven.  In his spare time, he enjoys being a pet owner with two dogs, a cat, chickens, and a Koi Pond and exploring Colorado’s natural beauty.

Paul Torrini

Paul Torrini

Manager of Community Associations

Paul Torrin’s 15-year background in Customer Service and newly found passion in Property Management drove him to pursue a future in Real- Estate. In 2021 he obtained his M-100 and enrolled in his Real Estate License. Eager to make an influence in the Property Management world Paul joined the ACCU Inc. family. Under the guide of ACCU Inc. Paul has discovered and cemented a new & exciting career in Association Community Management

Paul is very driven when it comes to education. Inspired by a belief that “Knowledge is Wealth,” he never stops when it comes to better understanding the world around him. Paul brings this belief with him into his new Carrer with ACCU Inc. and is self-motivated to learn so he may better guide his Boards to a wealthier future. Paul has goals to finish his CAM and CMCA and anything else he may need to ensure a successful career in Property Management

When Paul isn’t reading and continuing his education, he enjoys spending time with his family, music and his Camera. Paul’s husband and three dogs keep him busy and active with their weekly Hikes. Nature and Photography is another hobby thing he gets awarded with when he gets to hike with his family. Passionate and driven Paul is Excited to pursue a bright future with ACCU Inc., his Boards and everyone he works with

Amanda Phifer

Business Manager

Amanda Phifer is an experienced Office Manager with over a decade of experience in the field. She's highly organized and a great communicator with a strong eye for detail. She's a creative problem-solver and loves to tackle challenging tasks head-on. Her expertise includes project planning, and customer service. Amanda enjoys working in a collaborative environment and takes pride in facilitating projects that result in efficient and effective outcomes. She's committed to providing excellent customer service and a working environment that encourages respect and effective communication.

Amanda Phifer is creative and results-driven. She is dedicated to helping businesses reach their maximum potential. Amanda brings the tactical skill, motivation and enthusiasm to lead her clients from marketing conception to success.

Amanda has strong management and strategic planning skills, and an innate ability to understand client needs and develop appropriate solutions. She uses her deep understanding of electronic and print media to implement effective campaigns.

She is eager to embrace new challenges and dedicated to helping her clients succeed.

Jill Murphy
Our Address

1873 S Bellaire St Suite 1500 Denver, CO 80222