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DS Portrait of Dennis Siefker

Dennis Siefker

Experienced counselor blending compassion and practical strategies

LPC Colorado

Experience
30 years in practice
Focus areas
Addictions, Relationship, Family
Approaches
Cognitive Behavioral Therapy (CBT), Client-Centered Therapy
Languages
English
Continue with Dennis

About Dennis

Dennis Siefker is a licensed professional counselor practicing in Colorado with 30 years of clinical experience. He concentrates on helping people manage complex emotional and behavioral issues, including depression, addiction, anxiety, trauma, grief, relationship and intimacy concerns, and challenges related to eating, sleeping, and parenting.

Background and approach

His background also includes work with bipolar disorder, ADHD, compassion fatigue, and a range of personality and attachment-related difficulties. His style blends empathy with practical strategies, drawing on approaches such as Cognitive Behavioral Therapy, Client-Centered Therapy, Dialectical Behavior Therapy, Emotionally-Focused Therapy, and Existential Therapy.

Sessions emphasize collaborative problem solving, skill building, and exploration of values to support coping with life changes and to address communication and control issues. Dennis aims to help clients strengthen self-esteem, improve interpersonal functioning, and make steady progress toward their goals.

People seeking a therapist who combines long-term experience with a flexible, client-focused approach may find his practice a constructive option. He offers a professional therapeutic environment aimed at promoting insight, resilience, and clearer paths forward.

Approaches that guide online care and practical access



Dennis uses Cognitive Behavioral Therapy and Client-Centered Therapy as central tools in his online work. Cognitive Behavioral Therapy focuses on identifying and changing unhelpful thoughts and behaviors, which can be useful for managing anxiety, depression, substance use patterns, and sleep or eating disturbances. Client-Centered Therapy prioritizes the client's perspective, offering a supportive, nonjudgmental space that helps people explore emotions and make choices aligned with their values.

Choosing the right approach is part of the therapeutic process, and he works collaboratively to determine what fits best based on a client's goals, values, and practical needs. Together they review which techniques feel most helpful and adjust the plan as progress and priorities evolve.

Online therapy with him includes video sessions, phone appointments, live chat, or text-based messaging, providing flexible options to match schedules and comfort levels. These formats make regular contact and skills practice more accessible for people balancing work, caregiving, or other commitments while still engaging in structured therapeutic work with a licensed professional.

Frequently asked questions

What concerns does this therapist address?
Dennis works with a broad range of issues including addictions, depression, anxiety, trauma and abuse, relationship and intimacy-related problems, grief, eating and sleeping difficulties, parenting challenges, career concerns, bipolar disorder, ADHD, and compassion fatigue.
What is his therapeutic approach and style?
He combines client-centered empathy with evidence-based techniques such as Cognitive Behavioral Therapy and Dialectical Behavior Therapy, while also drawing on emotionally-focused and existential perspectives to tailor the work to each person.
How much experience does he have?
He brings 30 years of experience providing counseling and psychotherapy in Colorado settings with a long history of working across varied clinical concerns.
What are his credentials and where is he based?
He holds the LPC credential and is licensed in Colorado under CO LPC 12839, practicing from that state.
Does he offer services in other languages or accept international clients?
Sessions are conducted in English, and he is not accepting international clients at this time.
In what session formats can clients work with him?
He offers multiple online formats including video calls, phone sessions, live chat, and text-based messaging to accommodate different preferences and schedules.
How is cost handled for sessions?
Cost varies depending on location and therapist availability; sessions are provided through a subscription model that can be canceled at any time.
What are the steps to begin working with him?
To start, select the Start Therapy button, complete a short matching questionnaire, and schedule a session based on the therapist's availability.

Areas of expertise

Primary focus

AddictionsRelationship issuesFamily conflictsTrauma and abuseDepression

Also works with

Stress, AnxietyGriefIntimacy-related issuesEating disordersSleeping disordersParenting issuesAnger managementSelf esteemCareer difficultiesBipolar disorderCoping with life changesCompassion fatigueADHD

Additional focus areas

AbandonmentAntisocial personalityAttachment issuesAutism and Asperger SyndromeAvoidant personalityBlended family issuesBody imageCancerCo-morbidityCodependencyCommitment issuesCommunication problemsControl issuesCoping with natural or human-caused disasterDependent personalityDisruptive Mood Dysregulation Disorder (DMDD)DissociationDivorce and separationDomestic violenceDrug and alcohol addictionEmptinessFamily of origin issuesFamily problemsFatherhood issuesFirst responder issuesForgivenessGuilt and shameImpulsivityInfidelityIntellectual disabilityIsolation / lonelinessJealousyLife purposeMen's issuesMidlife crisisMood disordersNarcissismObsessions, compulsions, and OCDPanic disorder and panic attacksParanoiaPersonality disordersPhobiasPostpartum depressionPost-traumatic stressProcess addiction (porn, exercise, gambling)Seasonal Affective Disorder (SAD)Self-harmSelf-loveSex addictionSexual assault and abuseSocial anxiety and phobiaTraumatic brain injuryWorkplace issuesYoung adult issues

Therapeutic approaches

Client-Centered TherapyCognitive Behavioral Therapy (CBT)Dialectical Behavior Therapy (DBT)Emotionally-Focused Therapy (EFT)Existential TherapyMindfulness TherapyMotivational InterviewingSolution-Focused TherapyTrauma-Focused Therapy

Experience

30+ years

Licensed

Colorado

Languages

English